Purveyors of Electronic, Musical and Vintage goods from then, now and in between. 
Since 1982.

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            NEW LISTING 7/15/2021
(click on above thumbnails to enlarge photos)
CheckMarkSmall_web.jpg (792 bytes) warranty
RESTORED / REFURBISHED / FULLY SERVICED / WARRANTED
PIONEER OPEN REEL TO REEL TAPE RECORDER
 10.5" / 1/4" STEREO TAPE DECK
PIONEER RT-909 / RT909 REEL TAPE DECK
#...2720
 4-TRACK / 2-CHANNEL
  2-SPEED / 3 HEAD
AUTO-REVERSE
 5" / 7" / 10.5" (THE BIG ONES) REEL CAPACITY
  Circa 1979-84
MIJ
for sale


  Our technician has completely gone through and 'Certified' this unit.

 We have completely and extensively gone through the mechanicals and electronics of this unit.

 Entire transport was disassembled down to the chassis, and every mechanical part was cleaned, re-lubed and reassembled.

 Pinch-roller Lift Mechanism completely disassembled, cleaned and re-lubed (requires pulling head block, and Meter CB, once entire front face panel is removed and is fairly time consuming, but must be done on about 50% of 909's)

 PR mechanism solenoid mounts adjusted

 Capstans / flywheels removed, bushings and axels cleaned and re-lubed

 Capstans burnished

 Rubber pinch rollers have been replaced with FRESH units

 Brand new drive belt installed

 Heads have been cleaned and de-magnetized as well as the entire transport.

 Power supply CB adjusted to correct 15.1 VDC which enables proper and certainly best performance from Cap motor, Playback and Record amp circuits

 Both L&R Tape Tension arm mechanisms removed, completely disassembled, solvent cleaned and re-lubed with 500,000 grade silicone gel (time consuming process and must be done to about 75+% of 909's)

 Back tension adjusted on both reel motors.

 Reel motor start / run capacitors healthy

 All three motors test perfectly. Following above adjustments, Reel Start and Stop tested at beginning, middle and end of 7" and 10.5" tapes

 Brakes adjusted on fast wind modes on both 7.5 and fully loaded 10.5 reels from top speed.

 Internal pots, switches and controls cleaned and tested for noise-free function.

 We adjusted the 'Blue Fluorescent' VU meters electronically w/ factory test tone tapes, as well as the internal playback levels for both directions independently and record levels.

 Deck has been fully calibrated to factory manual specs, tested, and found to perform like new in all categories.

 Both spindles now in perfect alignment.

 We also adjusted the reel table heights.

 Heads have virtually no appreciable, visible wear. (heads also HAVE NONE of the common 'green, surface corrosion' that a lot of Pioneer tape decks seem to get {we've had loads with the corrosion, and haven't really found a good way to remove it when a deck has it short of 'lapping' them...which we don't do})  

 BOTH direction Playback and Record Head alignment / azimuth was adjusted for peak performance with factory test tone tape and oscilloscope.

 Both internal speed pots (VR21 & VR22) adjusted to 100% accuracy on 3.75ips and 7.5ips speeds  independently (with pitch control zero'd) (meaning that our 'official' 1000Hz test tape now plays back at 1000Hz +/- 1Hz w/ pitch control at 12:00 position).

 Recording tests performed with Ampex GM456 and Maxell UD (Gold / Black) Tapes.
Heres the results;

GM 456 @ 7.5ips. White Noise @ 0dB = +3 dB L&R with very little artifacts
GM 456 @ 7.5ips. 1kHz @ 0dB = +2 dB L&R
GM 456 @ 7.5ips. Recorded program from "ddd" source @ 0dB = +2-3 dB L&R and 'bright'
Maxell UD @ 7.5ips. White Noise @ 0dB = +1 dB L & +2 dB R with very little artifacts
Maxell UD @ 7.5ips. 1kHz @ 0dB = -.05 dB L&R
Maxell UD @ 7.5ips. Recorded program from "ddd" source @ 0dB = +1-1.5 dB L&R and 'bright'

Pretty damn good numbers for a 40 year old classic!


 Floor noise measured at >-60dBm

 Original Pioneer Leg / skid sourced to replaced one of the originals that had one end chipped off

 This Pioneer RT-909 functions, plays, and records perfectly (and we really put them through the paces, testing both with well mixed, recently recorded CD material and CD recorded / factory test tones looking for correct head Azimuth and speed accuracy).  (Total time investment in refurb / testing ~ 17+ hours).

 Face is made of beautiful brushed aluminum and with the exception of a small 'smug' area and other area of light striations (see photos) is in great condition and has never been rack mounted. Deck looks and following it's extensive service, now works great! 
____________________________

Looks GREAT & is "Ready-to-go"! The VERY sought after Pioneer RT-909 Stereo Reel to Reel tape deck. Will play / record stereo 1/4" tapes on reels 5, 7 & 10.5". This is one of the few reel to reel decks we get in that make it to our finished page. Great performer. This one made it through and all functions test great! If you're looking for a reel to reel deck to "actually use" here you go. Only about 30-50% of the used Reel decks out there can be "practically" restored to working order. Heads have no appreciable, visible wear, check the record test results above, evidence theyre in fine shape! Following extensive service and alignment, both mechanically and electronically, recordings sound FANTASTIC on this unit now. Looks and sounds great too! This one has never been 'rack mounted' so no 'rack-rash' on the mounting ears. As touched on above, the heads are in beautiful condition, also with none of the common 'green corrosion'. The reel tables do have a tolerable amount of the typical corrosion that is often seen on Pioneer RT's, but doesn't have any on the head cover (which they often do). Also, both the OEM plastic skids are intact now (afflicts about half the 901's and 909's out there (just FYI: the "skids / legs" on Pio RT-909's should always be removed prior to shipping).
Again, we have completely gone through it and it's ready to go!

Pioneer RT-909 Features include:

- 4-Track / 2-Channel
- 5" / 7" / 10.5" Reel Capacity (compatible with standard / normal 4-Track / 2-Channel tape format)
- 3 Heads for instant monitoring of tape levels while recording
- Three Motors for trouble free performance (has a lot to do with it still being a viable piece of gear due to less rubber parts)
- Dual Flywheel, Closed Loop Tape Transport
- BLUE METERS! Dual "Blue", Fluorescent level meters with dimmer selector
- Variable pitch control (+/- 6%)
- Auto-Reverse for Playback (when using tape with "auto-reverse" sensing foil) (Forward Recording, with forward & reverse playback)
- Dual speeds at 7.5 ips / 19cms and 3 3/4ips / 9.5 cms
- 'IC Logic' / Solenoid Drive Touch Transport control and 'Power Brake' tape handling
- Manual Reverse switches for changing direction with out flipping reels over 
- Spring loaded, Reel table locks (no need for rubber stoppers / clamps)
- Independent Tape 'Bias' and 'Equalization' settings
- Repeat function
- Separate & dual concentric mic and line level controls
- Source / Monitor selector (for instant monitoring of recording)
- Independent L & R record enable switches for doing "sound-on-sound"
- Pitch Control (Playback)
- Left & Right output level controls
- 4-Digit, "Blue", Fluorescent tape counter
- 'Timer' Play / Record function
- Dual front mounted 1/4" Microphone inputs
- Variable output level controls for each channel 
- Standard 19" rack mountable


Pioneer RT-909 Specifications:

Heads: 4 (record, erase, fwd-play, rev-play)
1 Hard 'Permalloy' Recording Head 
1 Ferrite Erase Head 
1 Hard 'Permalloy' forward Playback Head 
1 Hard 'Permalloy' reverse Playback Head

Motors: Capstan drive motor; 1 (FG servo DC motor)
Reel base drive motors; 2 (6-pole inner rotor special induction type)
Tape Speed:
19cm/s (7-1/2ips), 9.5cm/s (3-3/4ips) 0.5%
Wow and flutter:
< 0.04% WRMS (19cm/s)
< 0.08% WRMS (9.5cm/s)
Signal to noise ratio: >60dB
THD:
<1% @ 19cms
Frequency response:
@ 19cm/s  20Hz to 30,000Hz (20Hz to 28,000Hz 3dB)
@ 9.5cm/s  20Hz to 20,000Hz (20Hz to 18,000Hz 3dB)
Crosstalk:
>50dB
Channel separation:
>50dB
Erasing coefficient:
>60dB
Recording bias Frequency:
125kHz
Pitch-control:
+/- 6%
2 VU-meters:
dB (-30 to +8)
Input Sensitivity (Minimum / Maximum allowable level / impedance):
Mic x 2; 0.316mV /100mV /27kΩ, 1/4" / 6mm diam. jacks
(suitable microphone, 250Ω to 10kΩ)
Line; 50mV / 25V / 50kΩ
Output Level Reference / Maximum:
Line; 900mV / 50kΩ
Headphones; 50mV / 8Ω, 1/4" / 6mm diam. jack
Fast Wind Time w/ 720m Tape & 10.5" reel:
Less than 120 sec.


As stated earlier we have completely gone through it cleaning, lubing, adjusting, demagnetizing and testing everything. Plays and records perfectly, AGAIN, records at +2dB @ 1kHz!

As we replaced one, now the OEM feet / skids intact and perfect (these are commonly broken / partially missing).

Thick & solid brushed aluminum face plate in good condition with only the above mentioned rubs / striations, and has never been 'racked' so no rack screw rack rash / marks!  

Prior to arriving to us, the sheet metal case was re-sprayed in satin black and is in good condition. There is an area on the back panel where someone had engraved id info, no obliterated with vinyl adhesive covering it.

These are great machines. I have had this one myself for years. It's a blast to put on a BIG 10.5" reel with Pink Floyds, "Dark Side of the Moon". Even though it was designed for the consumer market, many were and are in use in schools, universities, libraries, clubs, etc. I worked at a Sheraton Inn in the late 70's and early 80's, and we had two in the DJ booth, that supplied foreground music from about 11AM till the DJ showed up at about 9PM, 7 days a week!

Also includes a 'non-Pioneer', Metal (Scotch brand with some surface wear), 10.5" take-up reel, as well as our normal accessory kit that includes a 'PlayBack Demo' made on the deck, a 7" plastic take-up reel, and a couple of other assorted 7" tapes to play with.
Includes a pdf / 'e-copy' download of the Pioneer RT-909 Owners manual, and if desired, a copy of the Pioneer RT-909 Service manual. Measures 19" wide x 11.5" deep x 13.5" high and weighs 46 lbs unpacked. Includes our standard 90 day limited warranty.
We have restored / refurbished / serviced MANY reel to reel decks over the past 2+ decades, including a lot of Pioneer RT-909's. This is THE BEST recording / performing deck we have finished. "The planets all aligned" and our tech was really able to 'dial' this one in!
PIONEER RT-909, #5708 Reel to Reel Tape Deck
Cond. 8.5+

$3699.


IN ADDITION TO ABOVE MENTIONED ACCESSORIES, WITH A PAIR OF NAB HUBS FOR 10.5" REELS!!!

(Reels shown in photos are not included, but we sometimes / occasionally have them for sale. Inquire at time of order.
However, all of our decks will come with 2x tapes for testing 'Playback' and 'Recording' as well as a 7" 'take-up' reel, and RCA patch cables for connection to your system)

 
 (Above text property of www.oaktreevintage.com / Oak Tree Enterprises, LLC. See 'Copyright Information' page for details)

 

 

 

         

            NEW LISTING 7/15/2021
(click on above thumbnails to enlarge photos)
CheckMarkSmall_web.jpg (792 bytes) warranty
RESTORED / REFURBISHED / FULLY SERVICED / WARRANTED
PIONEER REEL TO REEL TAPE DECK  
PIONEER RT-701 / RT701
 1/4" STEREO
4-TRACK / 2-CHANNEL
2-SPEED / 3 HEAD
3" - 7" REEL CAPACITY
#...3003
  Circa 1977-85

MIJ
for sale


 Our technician has completely gone through and 'Certified' this unit.

"
Original condition was 6-9dB low and slightly distorted recordings L&R. Speed after warm-up was decent at 1007Hz. Bias pots intermittent. PR & counter belt melted. PB level un-even by 4dB and both down. EOT mechanism sluggish, as well as typical "40-year, no maintenance / 'as-found' condition"

 We have completely and extensively gone through the mechanicals and electronics of this unit.

 4x #2SC1344, "Black legged" transistors replaced on Line-IN / Mic-IN PCB which cured distortion issues on recording and enabled levels to be adjust properly

 Internal mechanisms, disassembled, cleaned and re-lubed

 Brakes extensively adjusted on fast wind modes also.

 Reel motor torque adjusted to correct force in grams. All three motors test perfectly.

 We also adjusted the reel table heights. Both spindles in perfect alignment and run 'true'

 We also installed a new counter belt for trouble-free service.

 All External and Internal pots, switches and controls cleaned and tested for noise-free function.

 Rubber pinch roller has been replaced with brand new

 Cntr belt replaced with brand new

 Capstan burnished

 We adjusted the internal playback levels for standard 700Hz @ 0dB (VR103/V4104) as well as the record levels and both VU meters (VR101/VR102 on PB PCB #RWF-081) mechanically and electronically w/ factory test tone tapes.

 Headstacks have been cleaned and de-magnetized as well as the entire transport.

 Head-stack alignment / azimuth has been checked for peak performance with factory test tone tape out to 15khz and oscilloscope.

 Heads have typical, normal wear and are all in fine condition with hundreds of hours left.

 Both level meters adjusted for even playback level w/ factory test tone tape.

 Both table spindles run 'true' with no run-out

 New VU meter illumination lamps installed

 Bias adjusted (VR301, VR302, VR303, VR304 on OSC PCB #RWR-059) for Ampex GM-456 Grand Master tape (same as modern ATR formulation)

 Recording tests performed with Ampex GM456 and Maxell UD (Gold / Black) Tapes.
Heres the results;

GM 456 @ 7.5ips. 1kHz @ 0dB = +3.0 dB L&R in STD+STD positions with very little artifacts
GM 456 @ 7.5ips. 1kHz @ 0dB = 0 dB L&R in LH+LH positions with very little artifacts
GM 456 @ 7.5ips. 1kHz @ 0dB = +0.5 dB L&R in STD+STD positions
GM 456 @ 7.5ips. 1kHz @ 0dB = -0.25 dB L&R in LH+LH positions
GM 456 @ 7.5ips. Recorded program from "ddd" source was "AWSOME". Best in "LH" position. "STD" was a bit too 'bright'
Maxell UD @ 7.5ips. 1kHz @ 0dB = -1 dB L&R in STD+STD positions with very little artifacts
Maxell UD @ 7.5ips. 1kHz @ 0dB = -2.5 dB L&R in LH+LH positions with very little artifacts
Maxell UD @ 7.5ips. White Noise @ 0dB = +1.5 dB L & -0.5 dB R in STD+STD positions
Maxell UD @ 7.5ips. White Noise  @ 0dB = -1 dB L & -2.5 dB Rin LH+LH positions
Maxell UD @ 7.5ips. Recorded program from "ddd" source was "Great". Best in "LH" position. "STD" was again, a bit too 'bright'

Pretty damn good numbers for a 40 year old classic!


 Floor noise measured at >-60dBm

 Both internal speed pots adjusted to 100% accuracy on 3.75ips and 7.5ips speeds  independently (with pitch control zero'd) (meaning that our 'official' 1000Hz test tape now plays back at 1000Hz +/- 1Hz w/ pitch control at 12:00 position).

We really put them through the paces, testing both with well mixed, recently recorded CD material and CD recorded / factory test tones looking for correct head Azimuth and speed accuracy.  

 (Total time investment in refurb / testing ~ 19.5 hours).

Original face panel is made of beautiful brushed aluminum, and is in great condition NO marks from ever being rack mounted. Sheet metal bonnet and rear panel as well as the original finish all in near perfect shape.
Deck looks and works great!
 
____________________________

Looks GREAT & is "Ready-to-go"! The very sought after Pioneer RT-701 Stereo Reel to Reel tape deck. Will play / record stereo 1/4" tapes on reels up to 7". This is one of the few reel to reel decks we get in that make it to our finished page. Great performer. If you're looking for a reel to reel deck to "actually use" here you go. Only about 30-50% of the used Reel decks out there can be "practically" restored to working order. This one made it through and all functions test great! Looks and sounds great too! We have completely gone through it. 

Pioneer RT-701 Reel to Reel Features include:


- 3 Heads for instant monitoring of tape levels while recording
- 3 Motors for trouble free performance (has a lot to do with it still being a viable piece of gear due to less rubber parts)
- Variable pitch control
- Dual speeds at 7.5 ips / 19cms and 3 3/4ips / 9.5 cms
- Spring Loaded reel spindles. No need for rubber reel holders / clamps
- Separate & dual mic and line level controls
- Dual 1/4" front mounted mic inputs
- Source / Monitor selector
- Independent L & R record enable switches for doing "sound-on-sound"
- Left & Right output level controls
- Dual vertical analog VU level meters
- Dual position tape Speed / EQ selector
- End of tape shut off function (Auto-Stop)
- Dual front mounted 1/4" Microphone inputs
- Variable output level controls for each channel 
- RCA I/O's 


Pioneer RT-701 Reel to Reel Specifications as follows:

Track Format: 4-Track / 2-Channel stereo
Heads:
4 (record, erase, fwd-play, rev-play)
Motors: Direct-drive 3 motors. Capstan: FG System / AC Servo
Reel: 6-pole, inner rotor induction type

Operation System: Solenoid Drive / transport selection
Tape Speed: 3-3/4 and 7-1/2 ips
Reel Size: Up to 7"
Wow and flutter: < 0.05% WRMS (7-1/2 ips / 19cm/s)
Signal to noise ratio: >58dB
Frequency response: 7-1/2 ips = 20Hz to 28kHz weighted.
& 3-3/4 ips = 20Hz to 20kHz weighted.
Crosstalk: >50dB
Channel separation: >50dB
Input Impedance sensitivity / Impedance: 50mV / 100kΩ
Input Impedance sensitivity / Impedance: 0.25mV / 27kΩ
Pitch-control: +/- 6%
2 VU-meters: dB (+3 to -20)
Output Level at 0-VU: 450mV / 50k Ohms
Recording bias frequency: 125kHz.
Rewind Time w/ 1200 Tape: ~100 sec

Following the above stated bench work / testing, our technician has 'Certified' this deck and it is an great performer sonically and mechanically. As stated earlier we have completely gone through it cleaning, lubing, adjusting, demagnetizing and testing everything. Plays and records perfectly. 701's are direct drive thus requiring no drive belt to wear out. The only belt to wear out or break is the counter belt and this one was replaced with a brand new one. (Since the 701 does not use the counter for "Auto-Stop" sensing, if you ever break the counter belt, the deck will still run fine, unlike some other high-end decks. Just FYI)
Thick & solid brushed aluminum face plate in great condition. Great deck for adding QUALITY reel to reel capability to your audio system (vintage or otherwise), or for archiving / transferring your tape collection to another format such as CD, or hard-drive. Unit includes  an 'e' pdf copy of Pioneer RT-701 owners / users manual. Measures 19" wide x 14.5" deep x 9.5" high and weighs 44 lbs unpacked. Includes our standard 90 day limited warranty.
(Reels & tape shown in photos not included. All are usually available separately if you need them)
This is THE SECOND BEST ("second" only to the above Pioneer RT-909) recording / performing deck we have finished. "The planets all aligned again" and our tech was really able to 'dial' this one in as well!
PIONEER RT-701, #3003 Reel to Reel Tape Deck
Cond. 8.5++

$1799.

(Reels shown in photos are not included, but we sometimes / occasionally have them for sale. Inquire at time of order.
However, all of our decks will come with 2x tapes for testing 'Playback' and 'Recording' as well as a plastic, 7" 'take-up' reel, and RCA patch cables for connection to your system)

 
 (Above text property of www.oaktreevintage.com / Oak Tree Enterprises, LLC. See 'Copyright Information' page for details)

 

 

 

 

 

              

            NEW LISTING 7/15/2021
(click on above thumbnails to enlarge photos)
CheckMarkSmall_web.jpg (792 bytes) warranty
RESTORED / REFURBISHED / FULLY SERVICED / WARRANTED
PIONEER OPEN REEL TO REEL TAPE RECORDER
 10.5" / 1/4" STEREO TAPE DECK
PIONEER RT-909 / RT909 REEL TAPE DECK
#...2720
 4-TRACK / 2-CHANNEL
  2-SPEED / 3 HEAD
AUTO-REVERSE
 5" / 7" / 10.5" (THE BIG ONES) REEL CAPACITY
  Circa 1979-84
MIJ
for sale


  Our technician has completely gone through and 'Certified' this unit.

 We have completely and extensively gone through the mechanicals and electronics of this unit.

 Entire transport was disassembled down to the chassis, and every mechanical part was cleaned, re-lubed and reassembled.

 Pinch-roller Lift Mechanism completely disassembled, cleaned and re-lubed (requires pulling head block, and Meter CB, once entire front face panel is removed and is fairly time consuming, but must be done on about 50% of 909's)

 PR mechanism solenoid mounts adjusted

 Capstans / flywheels removed, bushings and axels cleaned and re-lubed

 Capstans burnished

 Rubber pinch rollers have been replaced with FRESH units

 Brand new drive belt installed

 Heads have been cleaned and de-magnetized as well as the entire transport.

 Power supply CB adjusted to correct 15.1 VDC which enables proper and certainly best performance from Cap motor, Playback and Record amp circuits

 Both L&R Tape Tension arm mechanisms removed, completely disassembled, solvent cleaned and re-lubed with 500,000 grade silicone gel (time consuming process and must be done to about 75+% of 909's)

 Back tension adjusted on both reel motors.

 Reel motor start / run capacitors healthy

 All three motors test perfectly. Following above adjustments, Reel Start and Stop tested at beginning, middle and end of 7" and 10.5" tapes

 Brakes adjusted on fast wind modes on both 7.5 and fully loaded 10.5 reels from top speed.

 Internal pots, switches and controls cleaned and tested for noise-free function.

 We adjusted the 'Blue Fluorescent' VU meters electronically w/ factory test tone tapes, as well as the internal playback levels for both directions independently and record levels.

 Deck has been fully calibrated to factory manual specs, tested, and found to perform like new in all categories.

 Both spindles now in perfect alignment.

 We also adjusted the reel table heights.

 Heads have virtually no appreciable, visible wear. (heads also HAVE NONE of the common 'green, surface corrosion' that a lot of Pioneer tape decks seem to get {we've had loads with the corrosion, and haven't really found a good way to remove it when a deck has it short of 'lapping' them...which we don't do})  

 BOTH direction Playback and Record Head alignment / azimuth was adjusted for peak performance with factory test tone tape and oscilloscope.

 Both internal speed pots (VR21 & VR22) adjusted to 100% accuracy on 3.75ips and 7.5ips speeds  independently (with pitch control zero'd) (meaning that our 'official' 1000Hz test tape now plays back at 1000Hz +/- 1Hz w/ pitch control at 12:00 position).

 Recording tests performed with Ampex GM456 and Maxell UD (Gold / Black) Tapes.
Heres the results;

GM 456 @ 7.5ips. White Noise @ 0dB = +3 dB L&R with very little artifacts
GM 456 @ 7.5ips. 1kHz @ 0dB = +2 dB L&R
GM 456 @ 7.5ips. Recorded program from "ddd" source @ 0dB = +2-3 dB L&R and 'bright'
Maxell UD @ 7.5ips. White Noise @ 0dB = +1 dB L & +2 dB R with very little artifacts
Maxell UD @ 7.5ips. 1kHz @ 0dB = -.05 dB L&R
Maxell UD @ 7.5ips. Recorded program from "ddd" source @ 0dB = +1-1.5 dB L&R and 'bright'

Pretty damn good numbers for a 40 year old classic!


 Floor noise measured at >-60dBm

 Original Pioneer Leg / skid sourced to replaced one of the originals that had one end chipped off

 This Pioneer RT-909 functions, plays, and records perfectly (and we really put them through the paces, testing both with well mixed, recently recorded CD material and CD recorded / factory test tones looking for correct head Azimuth and speed accuracy).  (Total time investment in refurb / testing ~ 17+ hours).

 Face is made of beautiful brushed aluminum and with the exception of a small 'smug' area and other area of light striations (see photos) is in great condition and has never been rack mounted. Deck looks and following it's extensive service, now works great! 
____________________________

Looks GREAT & is "Ready-to-go"! The VERY sought after Pioneer RT-909 Stereo Reel to Reel tape deck. Will play / record stereo 1/4" tapes on reels 5, 7 & 10.5". This is one of the few reel to reel decks we get in that make it to our finished page. Great performer. This one made it through and all functions test great! If you're looking for a reel to reel deck to "actually use" here you go. Only about 30-50% of the used Reel decks out there can be "practically" restored to working order. Heads have no appreciable, visible wear, check the record test results above, evidence theyre in fine shape! Following extensive service and alignment, both mechanically and electronically, recordings sound FANTASTIC on this unit now. Looks and sounds great too! This one has never been 'rack mounted' so no 'rack-rash' on the mounting ears. As touched on above, the heads are in beautiful condition, also with none of the common 'green corrosion'. The reel tables do have a tolerable amount of the typical corrosion that is often seen on Pioneer RT's, but doesn't have any on the head cover (which they often do). Also, both the OEM plastic skids are intact now (afflicts about half the 901's and 909's out there (just FYI: the "skids / legs" on Pio RT-909's should always be removed prior to shipping).
Again, we have completely gone through it and it's ready to go!

Pioneer RT-909 Features include:

- 4-Track / 2-Channel
- 5" / 7" / 10.5" Reel Capacity (compatible with standard / normal 4-Track / 2-Channel tape format)
- 3 Heads for instant monitoring of tape levels while recording
- Three Motors for trouble free performance (has a lot to do with it still being a viable piece of gear due to less rubber parts)
- Dual Flywheel, Closed Loop Tape Transport
- BLUE METERS! Dual "Blue", Fluorescent level meters with dimmer selector
- Variable pitch control (+/- 6%)
- Auto-Reverse for Playback (when using tape with "auto-reverse" sensing foil) (Forward Recording, with forward & reverse playback)
- Dual speeds at 7.5 ips / 19cms and 3 3/4ips / 9.5 cms
- 'IC Logic' / Solenoid Drive Touch Transport control and 'Power Brake' tape handling
- Manual Reverse switches for changing direction with out flipping reels over 
- Spring loaded, Reel table locks (no need for rubber stoppers / clamps)
- Independent Tape 'Bias' and 'Equalization' settings
- Repeat function
- Separate & dual concentric mic and line level controls
- Source / Monitor selector (for instant monitoring of recording)
- Independent L & R record enable switches for doing "sound-on-sound"
- Pitch Control (Playback)
- Left & Right output level controls
- 4-Digit, "Blue", Fluorescent tape counter
- 'Timer' Play / Record function
- Dual front mounted 1/4" Microphone inputs
- Variable output level controls for each channel 
- Standard 19" rack mountable


Pioneer RT-909 Specifications:

Heads: 4 (record, erase, fwd-play, rev-play)
1 Hard 'Permalloy' Recording Head 
1 Ferrite Erase Head 
1 Hard 'Permalloy' forward Playback Head 
1 Hard 'Permalloy' reverse Playback Head

Motors: Capstan drive motor; 1 (FG servo DC motor)
Reel base drive motors; 2 (6-pole inner rotor special induction type)
Tape Speed:
19cm/s (7-1/2ips), 9.5cm/s (3-3/4ips) 0.5%
Wow and flutter:
< 0.04% WRMS (19cm/s)
< 0.08% WRMS (9.5cm/s)
Signal to noise ratio: >60dB
THD:
<1% @ 19cms
Frequency response:
@ 19cm/s  20Hz to 30,000Hz (20Hz to 28,000Hz 3dB)
@ 9.5cm/s  20Hz to 20,000Hz (20Hz to 18,000Hz 3dB)
Crosstalk:
>50dB
Channel separation:
>50dB
Erasing coefficient:
>60dB
Recording bias Frequency:
125kHz
Pitch-control:
+/- 6%
2 VU-meters:
dB (-30 to +8)
Input Sensitivity (Minimum / Maximum allowable level / impedance):
Mic x 2; 0.316mV /100mV /27kΩ, 1/4" / 6mm diam. jacks
(suitable microphone, 250Ω to 10kΩ)
Line; 50mV / 25V / 50kΩ
Output Level Reference / Maximum:
Line; 900mV / 50kΩ
Headphones; 50mV / 8Ω, 1/4" / 6mm diam. jack
Fast Wind Time w/ 720m Tape & 10.5" reel:
Less than 120 sec.


As stated earlier we have completely gone through it cleaning, lubing, adjusting, demagnetizing and testing everything. Plays and records perfectly, AGAIN, records at +2dB @ 1kHz!

As we replaced one, now the OEM feet / skids intact and perfect (these are commonly broken / partially missing).

Thick & solid brushed aluminum face plate in good condition with only the above mentioned rubs / striations, and has never been 'racked' so no rack screw rack rash / marks!  

Prior to arriving to us, the sheet metal case was re-sprayed in satin black and is in good condition. There is an area on the back panel where someone had engraved id info, no obliterated with vinyl adhesive covering it.

These are great machines. I have had this one myself for years. It's a blast to put on a BIG 10.5" reel with Pink Floyds, "Dark Side of the Moon". Even though it was designed for the consumer market, many were and are in use in schools, universities, libraries, clubs, etc. I worked at a Sheraton Inn in the late 70's and early 80's, and we had two in the DJ booth, that supplied foreground music from about 11AM till the DJ showed up at about 9PM, 7 days a week!

Also includes a 'non-Pioneer', Metal (Scotch brand with some surface wear), 10.5" take-up reel, as well as our normal accessory kit that includes a 'PlayBack Demo' made on the deck, a 7" plastic take-up reel, and a couple of other assorted 7" tapes to play with.
Includes a pdf / 'e-copy' download of the Pioneer RT-909 Owners manual, and if desired, a copy of the Pioneer RT-909 Service manual. Measures 19" wide x 11.5" deep x 13.5" high and weighs 46 lbs unpacked. Includes our standard 90 day limited warranty.
We have restored / refurbished / serviced MANY reel to reel decks over the past 2+ decades, including a lot of Pioneer RT-909's. This is THE BEST recording / performing deck we have finished. "The planets all aligned" and our tech was really able to 'dial' this one in!
PIONEER RT-909, #5708 Reel to Reel Tape Deck
Cond. 8.5+

$3699.


IN ADDITION TO ABOVE MENTIONED ACCESSORIES, WITH A PAIR OF NAB HUBS FOR 10.5" REELS!!!

(Reels shown in photos are not included, but we sometimes / occasionally have them for sale. Inquire at time of order.
However, all of our decks will come with 2x tapes for testing 'Playback' and 'Recording' as well as a 7" 'take-up' reel, and RCA patch cables for connection to your system)

 
 (Above text property of www.oaktreevintage.com / Oak Tree Enterprises, LLC. See 'Copyright Information' page for details)

 

 

 
         

            NEW LISTING 7/15/2021
(click on above thumbnails to enlarge photos)
CheckMarkSmall_web.jpg (792 bytes) warranty
RESTORED / REFURBISHED / FULLY SERVICED / WARRANTED
PIONEER REEL TO REEL TAPE DECK  
PIONEER RT-701 / RT701
 1/4" STEREO
4-TRACK / 2-CHANNEL
2-SPEED / 3 HEAD
3" - 7" REEL CAPACITY
#...3003
  Circa 1977-85

MIJ
for sale


 Our technician has completely gone through and 'Certified' this unit.

"
Original condition was 6-9dB low and slightly distorted recordings L&R. Speed after warm-up was decent at 1007Hz. Bias pots intermittent. PR & counter belt melted. PB level un-even by 4dB and both down. EOT mechanism sluggish, as well as typical "40-year, no maintenance / 'as-found' condition"

 We have completely and extensively gone through the mechanicals and electronics of this unit.

 4x #2SC1344, "Black legged" transistors replaced on Line-IN / Mic-IN PCB which cured distortion issues on recording and enabled levels to be adjust properly

 Internal mechanisms, disassembled, cleaned and re-lubed

 Brakes extensively adjusted on fast wind modes also.

 Reel motor torque adjusted to correct force in grams. All three motors test perfectly.

 We also adjusted the reel table heights. Both spindles in perfect alignment and run 'true'

 We also installed a new counter belt for trouble-free service.

 All External and Internal pots, switches and controls cleaned and tested for noise-free function.

 Rubber pinch roller has been replaced with brand new

 Cntr belt replaced with brand new

 Capstan burnished

 We adjusted the internal playback levels for standard 700Hz @ 0dB (VR103/V4104) as well as the record levels and both VU meters (VR101/VR102 on PB PCB #RWF-081) mechanically and electronically w/ factory test tone tapes.

 Headstacks have been cleaned and de-magnetized as well as the entire transport.

 Head-stack alignment / azimuth has been checked for peak performance with factory test tone tape out to 15khz and oscilloscope.

 Heads have typical, normal wear and are all in fine condition with hundreds of hours left.

 Both level meters adjusted for even playback level w/ factory test tone tape.

 Both table spindles run 'true' with no run-out

 New VU meter illumination lamps installed

 Bias adjusted (VR301, VR302, VR303, VR304 on OSC PCB #RWR-059) for Ampex GM-456 Grand Master tape (same as modern ATR formulation)

 Recording tests performed with Ampex GM456 and Maxell UD (Gold / Black) Tapes.
Heres the results;

GM 456 @ 7.5ips. 1kHz @ 0dB = +3.0 dB L&R in STD+STD positions with very little artifacts
GM 456 @ 7.5ips. 1kHz @ 0dB = 0 dB L&R in LH+LH positions with very little artifacts
GM 456 @ 7.5ips. 1kHz @ 0dB = +0.5 dB L&R in STD+STD positions
GM 456 @ 7.5ips. 1kHz @ 0dB = -0.25 dB L&R in LH+LH positions
GM 456 @ 7.5ips. Recorded program from "ddd" source was "AWSOME". Best in "LH" position. "STD" was a bit too 'bright'
Maxell UD @ 7.5ips. 1kHz @ 0dB = -1 dB L&R in STD+STD positions with very little artifacts
Maxell UD @ 7.5ips. 1kHz @ 0dB = -2.5 dB L&R in LH+LH positions with very little artifacts
Maxell UD @ 7.5ips. White Noise @ 0dB = +1.5 dB L & -0.5 dB R in STD+STD positions
Maxell UD @ 7.5ips. White Noise  @ 0dB = -1 dB L & -2.5 dB Rin LH+LH positions
Maxell UD @ 7.5ips. Recorded program from "ddd" source was "Great". Best in "LH" position. "STD" was again, a bit too 'bright'

Pretty damn good numbers for a 40 year old classic!


 Floor noise measured at >-60dBm

 Both internal speed pots adjusted to 100% accuracy on 3.75ips and 7.5ips speeds  independently (with pitch control zero'd) (meaning that our 'official' 1000Hz test tape now plays back at 1000Hz +/- 1Hz w/ pitch control at 12:00 position).

We really put them through the paces, testing both with well mixed, recently recorded CD material and CD recorded / factory test tones looking for correct head Azimuth and speed accuracy.  

 (Total time investment in refurb / testing ~ 19.5 hours).

Original face panel is made of beautiful brushed aluminum, and is in great condition NO marks from ever being rack mounted. Sheet metal bonnet and rear panel as well as the original finish all in near perfect shape.
Deck looks and works great!
 
____________________________

Looks GREAT & is "Ready-to-go"! The very sought after Pioneer RT-701 Stereo Reel to Reel tape deck. Will play / record stereo 1/4" tapes on reels up to 7". This is one of the few reel to reel decks we get in that make it to our finished page. Great performer. If you're looking for a reel to reel deck to "actually use" here you go. Only about 30-50% of the used Reel decks out there can be "practically" restored to working order. This one made it through and all functions test great! Looks and sounds great too! We have completely gone through it. 

Pioneer RT-701 Reel to Reel Features include:


- 3 Heads for instant monitoring of tape levels while recording
- 3 Motors for trouble free performance (has a lot to do with it still being a viable piece of gear due to less rubber parts)
- Variable pitch control
- Dual speeds at 7.5 ips / 19cms and 3 3/4ips / 9.5 cms
- Spring Loaded reel spindles. No need for rubber reel holders / clamps
- Separate & dual mic and line level controls
- Dual 1/4" front mounted mic inputs
- Source / Monitor selector
- Independent L & R record enable switches for doing "sound-on-sound"
- Left & Right output level controls
- Dual vertical analog VU level meters
- Dual position tape Speed / EQ selector
- End of tape shut off function (Auto-Stop)
- Dual front mounted 1/4" Microphone inputs
- Variable output level controls for each channel 
- RCA I/O's 


Pioneer RT-701 Reel to Reel Specifications as follows:

Track Format: 4-Track / 2-Channel stereo
Heads:
4 (record, erase, fwd-play, rev-play)
Motors: Direct-drive 3 motors. Capstan: FG System / AC Servo
Reel: 6-pole, inner rotor induction type

Operation System: Solenoid Drive / transport selection
Tape Speed: 3-3/4 and 7-1/2 ips
Reel Size: Up to 7"
Wow and flutter: < 0.05% WRMS (7-1/2 ips / 19cm/s)
Signal to noise ratio: >58dB
Frequency response: 7-1/2 ips = 20Hz to 28kHz weighted.
& 3-3/4 ips = 20Hz to 20kHz weighted.
Crosstalk: >50dB
Channel separation: >50dB
Input Impedance sensitivity / Impedance: 50mV / 100kΩ
Input Impedance sensitivity / Impedance: 0.25mV / 27kΩ
Pitch-control: +/- 6%
2 VU-meters: dB (+3 to -20)
Output Level at 0-VU: 450mV / 50k Ohms
Recording bias frequency: 125kHz.
Rewind Time w/ 1200 Tape: ~100 sec

Following the above stated bench work / testing, our technician has 'Certified' this deck and it is an great performer sonically and mechanically. As stated earlier we have completely gone through it cleaning, lubing, adjusting, demagnetizing and testing everything. Plays and records perfectly. 701's are direct drive thus requiring no drive belt to wear out. The only belt to wear out or break is the counter belt and this one was replaced with a brand new one. (Since the 701 does not use the counter for "Auto-Stop" sensing, if you ever break the counter belt, the deck will still run fine, unlike some other high-end decks. Just FYI)
Thick & solid brushed aluminum face plate in great condition. Great deck for adding QUALITY reel to reel capability to your audio system (vintage or otherwise), or for archiving / transferring your tape collection to another format such as CD, or hard-drive. Unit includes  an 'e' pdf copy of Pioneer RT-701 owners / users manual. Measures 19" wide x 14.5" deep x 9.5" high and weighs 44 lbs unpacked. Includes our standard 90 day limited warranty.
(Reels & tape shown in photos not included. All are usually available separately if you need them)
This is THE SECOND BEST ("second" only to the above Pioneer RT-909) recording / performing deck we have finished. "The planets all aligned again" and our tech was really able to 'dial' this one in as well!
PIONEER RT-701, #3003 Reel to Reel Tape Deck
Cond. 8.5++

$1799.

(Reels shown in photos are not included, but we sometimes / occasionally have them for sale. Inquire at time of order.
However, all of our decks will come with 2x tapes for testing 'Playback' and 'Recording' as well as a plastic, 7" 'take-up' reel, and RCA patch cables for connection to your system)

 
 (Above text property of www.oaktreevintage.com / Oak Tree Enterprises, LLC. See 'Copyright Information' page for details)

 

 

 

 

 

 
         

            NEW LISTING 7/15/2021
(click on above thumbnails to enlarge photos)
CheckMarkSmall_web.jpg (792 bytes) warranty
RESTORED / REFURBISHED / FULLY SERVICED / WARRANTED
PIONEER REEL TO REEL TAPE DECK  
PIONEER RT-701 / RT701
 1/4" STEREO
4-TRACK / 2-CHANNEL
2-SPEED / 3 HEAD
3" - 7" REEL CAPACITY
#...3003
  Circa 1977-85

MIJ
for sale


 Our technician has completely gone through and 'Certified' this unit.

"
Original condition was 6-9dB low and slightly distorted recordings L&R. Speed after warm-up was decent at 1007Hz. Bias pots intermittent. PR & counter belt melted. PB level un-even by 4dB and both down. EOT mechanism sluggish, as well as typical "40-year, no maintenance / 'as-found' condition"

 We have completely and extensively gone through the mechanicals and electronics of this unit.

 4x #2SC1344, "Black legged" transistors replaced on Line-IN / Mic-IN PCB which cured distortion issues on recording and enabled levels to be adjust properly

 Internal mechanisms, disassembled, cleaned and re-lubed

 Brakes extensively adjusted on fast wind modes also.

 Reel motor torque adjusted to correct force in grams. All three motors test perfectly.

 We also adjusted the reel table heights. Both spindles in perfect alignment and run 'true'

 We also installed a new counter belt for trouble-free service.

 All External and Internal pots, switches and controls cleaned and tested for noise-free function.

 Rubber pinch roller has been replaced with brand new

 Cntr belt replaced with brand new

 Capstan burnished

 We adjusted the internal playback levels for standard 700Hz @ 0dB (VR103/V4104) as well as the record levels and both VU meters (VR101/VR102 on PB PCB #RWF-081) mechanically and electronically w/ factory test tone tapes.

 Headstacks have been cleaned and de-magnetized as well as the entire transport.

 Head-stack alignment / azimuth has been checked for peak performance with factory test tone tape out to 15khz and oscilloscope.

 Heads have typical, normal wear and are all in fine condition with hundreds of hours left.

 Both level meters adjusted for even playback level w/ factory test tone tape.

 Both table spindles run 'true' with no run-out

 New VU meter illumination lamps installed

 Bias adjusted (VR301, VR302, VR303, VR304 on OSC PCB #RWR-059) for Ampex GM-456 Grand Master tape (same as modern ATR formulation)

 Recording tests performed with Ampex GM456 and Maxell UD (Gold / Black) Tapes.
Heres the results;

GM 456 @ 7.5ips. 1kHz @ 0dB = +3.0 dB L&R in STD+STD positions with very little artifacts
GM 456 @ 7.5ips. 1kHz @ 0dB = 0 dB L&R in LH+LH positions with very little artifacts
GM 456 @ 7.5ips. 1kHz @ 0dB = +0.5 dB L&R in STD+STD positions
GM 456 @ 7.5ips. 1kHz @ 0dB = -0.25 dB L&R in LH+LH positions
GM 456 @ 7.5ips. Recorded program from "ddd" source was "AWSOME". Best in "LH" position. "STD" was a bit too 'bright'
Maxell UD @ 7.5ips. 1kHz @ 0dB = -1 dB L&R in STD+STD positions with very little artifacts
Maxell UD @ 7.5ips. 1kHz @ 0dB = -2.5 dB L&R in LH+LH positions with very little artifacts
Maxell UD @ 7.5ips. White Noise @ 0dB = +1.5 dB L & -0.5 dB R in STD+STD positions
Maxell UD @ 7.5ips. White Noise  @ 0dB = -1 dB L & -2.5 dB Rin LH+LH positions
Maxell UD @ 7.5ips. Recorded program from "ddd" source was "Great". Best in "LH" position. "STD" was again, a bit too 'bright'

Pretty damn good numbers for a 40 year old classic!


 Floor noise measured at >-60dBm

 Both internal speed pots adjusted to 100% accuracy on 3.75ips and 7.5ips speeds  independently (with pitch control zero'd) (meaning that our 'official' 1000Hz test tape now plays back at 1000Hz +/- 1Hz w/ pitch control at 12:00 position).

We really put them through the paces, testing both with well mixed, recently recorded CD material and CD recorded / factory test tones looking for correct head Azimuth and speed accuracy.  

 (Total time investment in refurb / testing ~ 19.5 hours).

Original face panel is made of beautiful brushed aluminum, and is in great condition NO marks from ever being rack mounted. Sheet metal bonnet and rear panel as well as the original finish all in near perfect shape.
Deck looks and works great!
 
____________________________

Looks GREAT & is "Ready-to-go"! The very sought after Pioneer RT-701 Stereo Reel to Reel tape deck. Will play / record stereo 1/4" tapes on reels up to 7". This is one of the few reel to reel decks we get in that make it to our finished page. Great performer. If you're looking for a reel to reel deck to "actually use" here you go. Only about 30-50% of the used Reel decks out there can be "practically" restored to working order. This one made it through and all functions test great! Looks and sounds great too! We have completely gone through it. 

Pioneer RT-701 Reel to Reel Features include:


- 3 Heads for instant monitoring of tape levels while recording
- 3 Motors for trouble free performance (has a lot to do with it still being a viable piece of gear due to less rubber parts)
- Variable pitch control
- Dual speeds at 7.5 ips / 19cms and 3 3/4ips / 9.5 cms
- Spring Loaded reel spindles. No need for rubber reel holders / clamps
- Separate & dual mic and line level controls
- Dual 1/4" front mounted mic inputs
- Source / Monitor selector
- Independent L & R record enable switches for doing "sound-on-sound"
- Left & Right output level controls
- Dual vertical analog VU level meters
- Dual position tape Speed / EQ selector
- End of tape shut off function (Auto-Stop)
- Dual front mounted 1/4" Microphone inputs
- Variable output level controls for each channel 
- RCA I/O's 


Pioneer RT-701 Reel to Reel Specifications as follows:

Track Format: 4-Track / 2-Channel stereo
Heads:
4 (record, erase, fwd-play, rev-play)
Motors: Direct-drive 3 motors. Capstan: FG System / AC Servo
Reel: 6-pole, inner rotor induction type

Operation System: Solenoid Drive / transport selection
Tape Speed: 3-3/4 and 7-1/2 ips
Reel Size: Up to 7"
Wow and flutter: < 0.05% WRMS (7-1/2 ips / 19cm/s)
Signal to noise ratio: >58dB
Frequency response: 7-1/2 ips = 20Hz to 28kHz weighted.
& 3-3/4 ips = 20Hz to 20kHz weighted.
Crosstalk: >50dB
Channel separation: >50dB
Input Impedance sensitivity / Impedance: 50mV / 100kΩ
Input Impedance sensitivity / Impedance: 0.25mV / 27kΩ
Pitch-control: +/- 6%
2 VU-meters: dB (+3 to -20)
Output Level at 0-VU: 450mV / 50k Ohms
Recording bias frequency: 125kHz.
Rewind Time w/ 1200 Tape: ~100 sec

Following the above stated bench work / testing, our technician has 'Certified' this deck and it is an great performer sonically and mechanically. As stated earlier we have completely gone through it cleaning, lubing, adjusting, demagnetizing and testing everything. Plays and records perfectly. 701's are direct drive thus requiring no drive belt to wear out. The only belt to wear out or break is the counter belt and this one was replaced with a brand new one. (Since the 701 does not use the counter for "Auto-Stop" sensing, if you ever break the counter belt, the deck will still run fine, unlike some other high-end decks. Just FYI)
Thick & solid brushed aluminum face plate in great condition. Great deck for adding QUALITY reel to reel capability to your audio system (vintage or otherwise), or for archiving / transferring your tape collection to another format such as CD, or hard-drive. Unit includes  an 'e' pdf copy of Pioneer RT-701 owners / users manual. Measures 19" wide x 14.5" deep x 9.5" high and weighs 44 lbs unpacked. Includes our standard 90 day limited warranty.
(Reels & tape shown in photos not included. All are usually available separately if you need them)
This is THE SECOND BEST ("second" only to the above Pioneer RT-909) recording / performing deck we have finished. "The planets all aligned again" and our tech was really able to 'dial' this one in as well!
PIONEER RT-701, #3003 Reel to Reel Tape Deck
Cond. 8.5++

$1799.

(Reels shown in photos are not included, but we sometimes / occasionally have them for sale. Inquire at time of order.
However, all of our decks will come with 2x tapes for testing 'Playback' and 'Recording' as well as a plastic, 7" 'take-up' reel, and RCA patch cables for connection to your system)

 
 (Above text property of www.oaktreevintage.com / Oak Tree Enterprises, LLC. See 'Copyright Information' page for details)

 

 

 

 

 

 
 
 
      

NEW LISTING 9/19/2020
(Click on above thumbnails to enlarge photos)

CheckMarkSmall_web.jpg (792 bytes) warranty
RESTORED / REFURBISHED / FULLY SERVICED
SONY REEL-TO-REEL 1/4" STEREO TAPE DECK
SONY TC-377 / TC377
4-TRACK / 2-CHANNEL
3-SPEED / 3 HEAD (F&F HEADS!)
"LOCKING SPINDLES"!!!
3"- 7" REEL CAPACITY
#...1131
Circa 1972-77

SOLD 12/16/2020
SHIPPING TO DONNELLE IN CALIFORNIA


Of the many Reel to Reel Tape decks built by Sony, especially from the late 1960s and into the early 70s, this has always been one of our favorite machines for Features, Build quality (that by luck, lends itself well to restoration 50 years later), solid and most importantly DEPENDABLE performance, and consistent sound quality.

 
 Our technician has completely gone through and 'Certified' this unit.

 Entire transport was disassembled down to the chassis, and every mechanical part including head block assembly, was cleaned of "varnished" lubes and re-lubed as well as the always at issue on most Sony's of this era, Pinch Roller plunge assembly, re-lubed and reassembled.

 All Drive and counter belts replaced for trouble-free service. Rubber pinch roller has been reconditioned, as well as all three internal drive tires / wheels for positive grip, capstan burnished.

 "SERVICE DETAILS" COMING...
   
GREAT performing Sony TC-377 1/4" Open Reel to Reel stereo tape Record / Play deck and has all 3 consumer speeds! Good for reel sizes up to 7" in diameter. Great for burning your tapes to CD or Hard Drive or for making new tapes. Also great for having fun in your project recording studio.
As stated earlier our technician noted that the heads were in essentially new condition. He further stated on the work sheet, "overall, the deck shows little use, and was remarkably, actually functional prior to tear down." (a 45 year old deck that still functions prior to a restoration, would be classified as "remarkable")
Sony TC-377 Features include:
   
- Triple speeds @ 7.5 ips / 19cms, 3 3/4ips / 9.5 cms and extra long 1 7/8 ips / 4.75 cms
- 3-Heads for instant monitoring of tape levels / record quality while recording
- Plays up to a 7" reel as well as 3" & 5" reels
- Playback / Recording of either stereo or mono tapes
- "F&F" Ferrite & Ferrite Heads (super hard heads to prevent un-even headwear and maintain a perfectly parallel gap for preserving top end in recordings)
- Separate L & R Signal Input level controls
- Separate L & R Microphone level controls
- Auto-Stop
- Dual analog VU meters for monitoring Playback and Record levels
- "Sound-On-Sound" capable w/ independent L & R record Source / Monitor engage switches
- Tape 'Echo' effect capable
- Built-in Tape Type selector for normal or "Low Noise / Extended Headroom" tapes
- Dual front mounted 1/4" mic input jacks
- 1/4" Stereo Headphone jack
- Mechanical Tape counter
- Variable Output level control located near I/O ports
(one of the most important features on a deck in our opinion. Allows you to match volume level of other sources, allows adjustment for 'best' pre-amp input to avoid distortion, allows you to change the volume of the deck if you have it located remotely from the pre-amp / receiver as I do, and many other applications)
- Lockable Pause "Inst-Stop" lever
- Mic Attenuator selector
- RCA inputs and outputs
- Spring loaded tape hub spindles (no need for rubber reel retainers)
- Can be mounted in cabinet for 'vertical' orientation (as currently installed) or inverted for 'horizontal' use.
- 3-Prong, Grounded AC cord

   
Original Sony TC-377 Tape Deck Specifications:
 
(All with Sony SLH-180 type tape)
 Power Requirements:  117 VAC, 30 watts, 60 Hz     

 Capstan Drive Motor Type: Induction
 Tape Speed: 7.5 ips / 19cms, 3 3/4ips / 9.5 cms and extra long 1 7/8 ips / 4.75 cms mechanically switched with single lever, with automatic switching for equalization changes       
 Reels: 1/4" tape on 7 inches ог smaller
 Recording Format: 4-track stereophonic оr monophonic
 Frequency Response: 30-25,000 Hz @ 7 1/2ips.
                                  30-20,000 Hz @ 3 3/4 ips.
                                  30- 9,000 Hz @ 1 7/8 ips.
 Signal-to-Noise Ratio: > 55 dB @ 7 1/2 ips w/ high bias tape
 > 52 dB @ 7 1/2 ips w/ normal bias tape
 Flutter and Wow: < 0.09% @ 7 1/2 ips.
                          < 0.12% @ 3 3/4 ips.
 Level Indication: Dual Analog VU Meters
 Record: Calibrated to NAB standard reference level

 Playback Time: With 1,800' tape
 (4-track stereo)  (4-track mono) 7 1/2 ips  1 hr. 30 min.                  / 3 hr. & @ 3 3/4 ips. 3 hr. / 6 hr.
 Inputs: Dual 1/4" Microphone Input Jacks and dual RCA jacks
 Outputs: Dual RCA jacks
 Output Impedance: 10kΩ
 Line Input Sensitivity: .06 Volts
 Line Input Impedance: 100k
 Bias Frequency: 160 (kHz)
 Rewind Time w/ 1200 Tape:- 120 sec
 

Again, following the above stated bench work / testing, our technician has 'Certified' this deck and it is an great performer sonically and mechanically. This deck has had typical restoration. It's pretty much had the clock rolled back 45+ years on it. With the exception of a small veneer chip on the front, right, lower corner, (see photos above) the units looks fabulous. Again, over and above our standard restoration, this deck has virtually NEW heads!
Machine is READY TO GO! Would make a great deck for any one needing a deck to do tape to CD or Hard Drive transfers of reel to reel tapes or for making NEW reel tape recordings. Comes with an 'e' copy / pdf of the Sony TC-377 owners / users manual. Includes a take-up reel. Includes our standard 90 day limited warranty. Measures 16.25" wide x 8.5" deep x 15.75" tall and weighs 24 lbs unpacked.
(Reels & tape shown in photos not included. All are sometimes available separately if you need them) 
SONY TC-377 REEL TO REEL TAPE RECORDER / DECK #...1131
Cond. 8.5+++ (only due to a small veneer chip)

SOLD 12/16/2020
SHIPPING TO DONNELLE IN CALIFORNIA


(Reels shown in photos are not included, but we sometimes / occasionally have them for sale. Inquire at time of order.
However, all of our decks will come with 2x tapes for testing 'Playback' (actually made on this deck) and 'Recording' as well as a 7" 'take-up' reel, and RCA patch cables for connection to your system)

(Above text, in it's entirety, property of www.oaktreevintage.com / Oak Tree Enterprises, LLC. See 'Copyright Information' page for details)

 

 

          

       




NEW LISTING 12/22/2020
(Click on above thumbnails to enlarge photos)
CheckMarkSmall_web.jpg (792 bytes) warranty
FULLY SERVICED / REFURBISHED
CLASSIC / SEMI-PRO TEAC MULTI-TRACK REEL TO REEL TAPE DECK
TASCAM SERIES
TEAC / TASCAM 40-4 4-TRACK TAPE DECK
4-TRACK / 4-CHANNEL STEREO /
*QUADRAPHONIC / MONO
3-HEAD / 2-SPEED (7.5 & 15IPS) / 3-MOTOR
10.5", 7" REELS AND / OR
**
SMALLER
'SIMUL-SYNC'
MULTITRACK 1/4" TAPE DECK
#....7392
MIJ
Circa 1978-81

SOLD 12/23/2020
SHIPPING TO DAVID IN IOWA


 Our technician has completely gone through and 'Certified' this unit.

 We have completely gone through the mechanicals and electronics of this unit.

 Replaced three, incorrect value fuses in 'lower fuse PCB' #109

 All Power supply outputs tested and verified at spec.

 Transport mechanisms disassembled, cleaned, lubed w/ 'SuperLube', silicone based gel and light machine oil as necessary and reassembled including PR Pivot Arm mechanism.



 Tape Tension arms disassembled, cleaned and re-lubed, and had fresh 300,000 grade silicone lube gel applied

 Replaced one reel table / spindle

 Tape Left Tension arm had extra spring tension added for better performance on tape handling

 Capstan flywheel removed, cleaned bushings and axels cleaned and re-lubed w/ 80-90W gear oil. Flywheel surface burnished.

Capstan Motor re-lubed (has 'oil tubes')

 Capstan cleaned and burnished in drill press while removed

 Pinch-roller mechanism completely disassembled, cleaned and re-lubed.

 Rubber pinch roller removed, re-surfaced, conditioned and re-installed with fresh lubricant.

 Impedance roller had both its end bearings removed and new ones (#626) pressed in for silent tape transportation.

'Main' / Capstan belt reconditioned.

 Fresh, new counter belt (#049) installed.

 Heads have been cleaned and de-magnetized as well as the entire transport.

 Brakes adjusted on fast wind modes also (optimized for 7" & 10.5" tape.)

 Back tension checked / adjusted on both reel motors.

 All three motors test perfectly. Following above adjustments, Reel Start and Stop tested at beginning, middle and end of 7" & 10.5" tapes (VERY QUICK 'FAST WIND' ON THIS ONE)

 Both spindles in perfect alignment w/ no 'run-out' at any speed.

 Both spindle-locks hold tightly.

 We also adjusted the reel table heights.

 Heads in great shape as well, with lots of performance left in them

 Removed and burnished COMMONLY INTERMITTENT contacts on channel Circuit Boards and re-seated. Adjusted pin contacts for better connections. Was discovered that these connectors was the source of channel intermittence.

 All meter lamps replaced #25-455

 Both 'Counter' lamps replaced #A403

 All 'internal' / PC mounted pots, switches and controls cleaned and tested for noise-free function

 All 'User' pots, switches and controls cleaned and tested for noise-free function

 Playback and Record Head alignment / azimuth was adjusted for peak performance with factory test tone tape and oscilloscope.

 We adjusted the VU meters mechanically for correct 'resting position' and electronically w/ factory test tone tapes, as well as the internal playback, Monitor levels, and record levels utilizing STL test / alignment tapes.

    


 We adjusted the Bias for great sound with Ampex GM-456 tape.

 Speed tested to 99.7% accuracy following refurb (meaning that our 'verified' 1000Hz accuracy using a 1000 Hz STL test tape.  (test tape now plays back at 1003Hz +/-1Hz when warmed up).


 
 Adjusted to record AMAZINGLY WELL; 1k to 10kHz input @ 0dB = ~-1 to -2dB on 456 tape. Also tested with full bandwidth White-Noise, and in 'Real World' use w/ 'mixed DDD CD' signals. (Tested with Maxell UDXL Tape and Ampex GM-456 (best results with Ampex GM-456).

 Floor noise measured at >-60dBm w/ blank tape, L&R

 Following refurb / service mechanicals tested for 'play torque' at beginning and end of largest size reels, as well as 'Fast wind torque' and 'braking tension' in both FF and REW, at beginning, middle and end of tapes. In other words, every combination of transport function was tested and passed.

 This TEAC / TASCAM 40-4 functions, plays, and records VERY WELL (and we really put them through the paces, testing both with well mixed, recently recorded CD material and CD recorded / factory test tones looking for correct head Azimuth and speed accuracy).  (Total time investment in refurb / testing ~ 18+ hours).

 This deck had been rack-mounted so it arrive with NO side panels or most 'sheet metal'. We sourced a 'parts donor' deck later (took about a year of looking / waiting)

This is an amazing deck for both recording or playback, again of Multi-Track / Four-Track / Four-Channel / Stereo /
**Quadraphonic / Mono' tapes for speeds of 7.5ips or 15ips. Following refurbishment, the deck looks and works great and sounds amazing!!! 

The encore to the TEAC / A-3440, the TEAC / TASCAM 40-4 Multi-Track / Four-Track / Four-Channel / Stereo / Quadraphonic / Mono (Yep, that pretty much covers everything but 'half-track') Reel to Reel tape deck. Ready to GO! We've had this deck in our warehouse for years, waiting for a 'senior tech' who was qualified to the task of bringing such a deck back to life CORRECTLY. One of a recent few, we've had make it through satisfactorily in 24+ years of dealing in vintage audio.

 Following our extensive refurb / bench time it's now an AMAZING performer (Check the 'recording test results' above and the 'specs' in text below). If you're looking for a reel to reel deck to "actually use" here you go. Only about 25% of the used Reel decks out there can be "practically" restored to working order. This one made it through with flying colors after about
18 hours of bench time.

From the original TEAC / TASCAM 40-4 brochure:
They are ideal for a wide spectrum of uses: tracks for a record album, making commercial spots, or doing production work in radio, TV or Film. You can make superior recordings with these easy to operate recorders, and you get the quality and reliability for which TEAC is known. (of course as it does all of those professional tasks, it can certainly do anything you need at home).

The deck tests great! Cosmetically it's in great condition. Really not much cosmetically to talk about that the above photos don't show. There's a few small tics along the edges of the wood, grain side panels and a bit of wear to the edges of the finish on the head cover and a few scratches on the pinch roller hub cap. Nothing at all distracting. Just a solidly built, 'Pro' series deck, that's READY TO GO!

TEAC / TASCAM 40-4 Features include:

- Multi-Track / 4-Track / 4-Channel Stereo / Mono head stack / tape format
- DURABLE AC powered capstan motor (lasts decades longer than DC capstan motors of the 'later' models)

**(Can also play 'Quadraphonic' tapes as long as your tapes are 7.5 or 15 ips. Of course you can record 'Quadraphonic' tapes as well if you have the supporting resources)
- 3 Heads for instant monitoring of tape levels while recording
- 10.5" Max Reel Capacity (The BIG Reels!)
(*but could play down to 3", however the torque and brakes are optimized for 10.5" reels) (when in "fast wind" mode, it is sometimes necessary to switch to "Large Reels" when utilizing 7" or smaller reels to keep tension arm from moving to 'auto-shut-off' position)
- Punch In / Punch Out Function
- 3 Motors (means less 'Rube Goldberg' mechanisms inside like many R2R's)
- IC logic tape transport for "Touch" control
- Dual speeds at 15ips / 38cms & 7.5 ips / 19cms
- Multi-Track / Sound-on-Sound / Sound-with-Sound / Duet recording capable
- Cue Lever with 'variable pressure' for lifting tape away from head in Fast Wind modes or for moving tape close enough to head to monitor fast wind progress
- Output selector for Input, Norm or Monitor (this feature will require an understanding of the 'user manual')
- Play / Pause control lets you manually rock the reels back / forth while you listen to pinpoint an exact point for editing. (also if youre the DJ type, you can also use this feature to scratch-n-sniff just like on your records. Can you say, Yipeeee! ?... Oh sorry, I mean, Yo Dog)
- Reel Size selector for proper tape 'back tension' and braking.
- Variable Input level control for each channel
- Analog VU level meter for each channel
- Analog Tape Counter
- Spring loaded reel spindles (no need for 'rubber stoppers / reel clamps')
- RCA Line I/O's for all channels
- Accessory connectors for optional TEAC Remote control (not included, nor currently available)
- Multi-pin logic connector for external dbx unit (not included, nor currently available)


TEAC / TASCAM 40-4 Specs / Specifications:

Track / Head / Head-stack Format: 3 heads, inline (4-track / 4-channel, stereo/monaural system) Ferrite Erase and 'Permalloy' Record and Playback heads
Motors: 3X. Capstan motor: 4/8 pole, large size Hysteresis synchronous. Reel motors: 6-pole, eddy current
Reel Size: Acceptable 7 & 10.5" (3" & 5 reels may not brake correctly as deck is optimized for 7-10.5" reels)
Tape Speeds: 15 ips / 38cms & 7.5 ips / 19cms
Tape Speed accuracy: 0.5%
Frequency Response in Sync mode:
40-20,000 Hz @ 15ips.
3dB
25-15,000 Hz @ 7 1/2ips.
3dB
Wow and Flutter: 0.04% @ 15ips & 0.06% @ 7.5ips (NAB)
S/N ratio: >65Db @ 15ips / Wtd
Crosstalk; >50dB down adjacent track @ 1kHz
Erasure Depth; >65 @ 1kHz +10dB
THD: <1% @ 0VU & @ 1kHz. 3% @ +9VU & @ 1kHz
VU Meters; approx; -25dB to +5dB VU range
Bias Frequency; 100kHz
Line Input (AUX input): -10dB (0.3V) nominal /  Impedance 20kΩ
Record Level Calibration: 0 VU reference is 250 nWb/m tape flux level; adjustable LEDs preset to turn On at signal level of +10 VU.
Line Output: -10dB (0.3V) nominal & -+18dB (8.0V) nominal /  Impedance 10kΩ unbalanced
Fast Wind Time: Approx 120 Seconds for 10.5" reel / 2400' & approx 140 seconds for 1800'
Start Time (stop to full motion play): .05 sec @ 15ips & .04 sec @ 7.5 ips

As stated earlier we have EXTENSIVELY gone through it cleaning heads and all else, lubing, adjusting, reconditioning pinch rollers and other rubber parts, demagnetizing heads and entire transport and testing everything. Tape speed tested and resulted in 99.7% accuracy using a 1000 Hz STL test tape. Plays and records Exceptionally well (and we really put them through the paces, testing both with well mixed CD material and CD test tones looking for correct head Azimuth, tape speed accuracy and making test recordings. Again, check the 'test results' listed above). Pinch rollers and heads all in GREAT condition!!!

This is a highly sought after deck and now, following the extensive service, with UNBELIEVABLE PERFORMANCE.
This was not only a GREAT 'Musicians' deck, as a performer could 're-visit' their old band tapes to transfer to computer, DAW, or 'Stereo Mix Down', but since it also does standard 'Stereo' playback, Mono and even Quadraphonic (Quadriphonic) playback, it's about as versatile as you can get. Also would be a great deck for a 'media transfer house / business' that has clients with old 'band tapes' that they want to get mixed down to stereo.
All of our restored / refurbished reel to reel decks come with a 7", plastic take-up reel, a 'known good' 7" tape for initial testing of playback, and a 7" tape you can record onto, all to assist you in becoming familiar with the operation / function of your new reel to reel tape deck.
Comes with an 'e-copy' / pdf download of the TEAC / TASCAM 40-4 owners / operations manual. Measures 21" tall (with skids installed) x 17.3" wide (w/ wood side panels installed) x 21.5" tall x 12" (from tip of back feet-tip of hubs) deep and weighs a
VERY HEAVY 72+ lbs unpacked. Includes our standard 90 day limited warranty.
(Reels, tape and any NAB hubs shown in photos not included. All are sometimes available separately if you need them. We do ship our decks with a plastic take-up reel, a tape to 'practice record' on and a 'pre-recorded' tape for playback.) 
TEAC / TASCAM 40-4 MULTI-TRACK / STEREO / MONO REEL TO REEL TAPE DECK
Cond. 8.5

SOLD 12/23/2020
SHIPPING TO DAVID IN IOWA


(Reels, tape and any NAB hubs shown in photos are not included, but we sometimes / occasionally have them for sale. Inquire at time of order.
However, all of our decks will come with 2x tapes for testing 'Playback' and 'Recording' as well as a 7" 'take-up' reel, and RCA patch cables for connection to your system)


 
 (Above text property of www.oaktreevintage.com / Oak Tree Enterprises, LLC. See 'Copyright Information' page for details)

(Due to it's size and weight, it runs a bit more for shipping relative to other (consumer) reel to reel machines)

 
 
              

NEW LISTING 9/19/2020
(Click on above thumbnails to enlarge photos)

CheckMarkSmall_web.jpg (792 bytes) warranty
RESTORED / REFURBISHED / FULLY SERVICED
TANDBERG
REEL TO REEL TAPE DECK
TANDBERG X9100
#...8884
 4-TRACK / 2-CHANNEL STEREO / MONO
 4-HEADS (One is "Cross-Field") / 2-SPEED / 3-MOTOR
"DIRECT DRIVE"
"CROSS-FIELD" BIAS HEAD
"ECHO / SOUND ON SOUND" CAPABLE
7" OR 5" REELS
REEL TO REEL 
1/4" TAPE DECK


SOLD 10/12/2020
SHIPPING TO ALAN IN VIRGINIA


 Our technician has completely gone through and 'Certified' this unit.

 We have completely and extensively gone through the mechanicals and electronics of this unit.

 Transport was disassembled, and mechanical parts disassembled, cleaned, re-lubed and reassembled

 Tape Tension arms disassembled, cleaned and re-lubed, and their springs adjusted and had fresh 500,000 grade silicone lube gel applied

 pinch-roller mechanism completely disassembled, cleaned and re-lubed

 Damaged Pinch roller arm springs replaced

 PR mechanism solenoid mounts adjusted

 Capstans / flywheels removed, bushings and axels cleaned and re-lubed and flywheels burnished (see photos above)

 Capstan burnished

 Rubber pinch roller removed and re-conditioned

 Brand new #042 counter belt installed (no other belts, as it's "Direct Drive")

 Heads have been cleaned and de-magnetized as well as the entire transport.

 Brakes adjusted on fast wind modes also (optimized for 7" tape.)

 Back tension adjusted on both reel motors.

 EOT sensor adjusted

 All three motors test perfectly. Following above adjustments, Reel Start and Stop tested at beginning, middle and end of 7" tapes

 Internal pots, switches and controls cleaned and tested for noise-free function (initially, of course, had typical static / noise which is to be expected in an 'un-serviced' deck after 35+ years).

 We adjusted the VU meters mechanically and electronically w/ factory test tone tapes, as well as the internal playback levels for both directions independently and record levels.

 Specific to this deck, all the circuit board pins and connectors (and there are dozens), burnished individually with fiber-glass pen (this is a must on this deck for reliable performance)

 Both spindles in perfect alignment.

 We also adjusted the reel table heights.

 Heads in great shape as well, with many years of performance left in them.

 Playback and Record Head alignment / azimuth was adjusted for peak performance with factory test tone tape and oscilloscope.



 Speed tested to 98.6% accuracy following refurb (meaning that our 'verified' 1000Hz test tape now plays back at 986Hz).

 Adjusted to record a @ -0dB = 0dB PB (+/- 3dB) @ 1kHz on Maxell UDXL tape (Biased for same Maxell UDXL tape).

 Floor noise measured at >-60dB w/ blank tape, L&R

 This Tandberg 9100X functions, plays, and records VERY WELL (and we really put them through the paces, testing both with well mixed, recently recorded CD material and CD recorded / factory test tones looking for correct head Azimuth and speed accuracy).  (Total time investment in refurb / testing
~ 21 hours).

Face is beautiful, brushed, Stainless Steel and TEAK wood, veneer side panels all in great condition. Deck looks and works great! 


The Tandberg 9100X Stereo Reel to Reel tape deck. Ready to GO! This is one of the few reel to reel decks we get in that make it to our finished page. Great performer. If you're looking for a reel to reel deck to "actually use" here you go. Only about 25% of the used Reel decks out there can be "practically" restored to working order. This one made it through with flying colors again after
~21 hours of bench time.

The deck tests great! Looks and sounds great too! We have completely gone through it. Will play 3", 5" & 7" reels (transport best optimized for 7" reels).

Tandberg 9100X Features include:

- 4-Track / 2-Channel head stack / tape format
- 3 Heads for instant monitoring of tape levels while recordin
g (actually there's a "4th head" to handle 'bias', which is what the "Cross Field" means)
- Cross-Field Biasing (via separate head) allows for pushing levels harder, and excellent 'high frequency' performance

- 3 Motors (tech noted, "heavy duty") for trouble free performance (has a lot to do with it still being a viable piece of gear due to less rubber parts)
- Echo & Sound-on-Sound (if you're versed at using that style of recording, or educate yourself on it via the included manual)
- IC logic tape transport for "Touch" control
- Dual front mounted, BALANCED 1/4" Microphone inputs
- Analog tape counter

- Triple speeds at 7.5 ips / 19cms, 3 3/4ips / 9.5 cms &
1 7/8 ips / 4.8 cms
- Separate dual mic and line level controls AND CAN BE 'MIXED'!
- Dual, BALANCED 1/4" front mounted mic inputs
- Source / Monitor selector
- Photo-Electrical / Optical tape auto-stop for transport (best used with leaders installed on tapes)
- Edit / Cue Button (for hearing tape during 'Fast Wind')

- L & R Output level control (also controls volume to Headphones)
(one of the most important features on a deck in our opinion. Allows you to match volume level of other sources, allows adjustment for 'best' pre-amp input to avoid distortion, allows you to change the volume of the deck if you have it located remotely from the pre-amp / receiver as I do, and many other applications)
- Dual analog VU level meters (lit during Recording. Dark for Playback by design)
- Spring loaded tape hub spindles (no need for rubber reel retainers)
- optional wired remote port on rear panel (remote not included)


As stated earlier we have completely gone through it cleaning heads and all else, lubing, adjusting, reconditioning pinch rollers and other rubber parts, demagnetizing heads and entire transport and testing everything. Tape speed tested and resulted in 98.6% accuracy using a 1000 Hz test tape. Plays and records Exceptionally well (and we really put them through the paces, testing both with well mixed CD material and CD test tones looking for correct head Azimuth, tape speed accuracy and making test recordings). Pinch rollers and heads all in GREAT condition!!! Face is made of beautiful, brushed, stainless steel and looks great. Very clean and looks near new. Unit looks GREAT! 

Tandberg X9100 Specs / Specifications from the original 9100X brochure as follows:

Head / Head-stack Format: 3+1 heads (Playback, 4-track, 2-channel, stereo/monaural system and 'Cross-Field" Bias head)
Motors: 1x Dual-Speed, Hysteresis Synchronous Capstan Motor & 2x Eddy Current Induction Reel Motors
Reel Size: 5 & 7 (5 reels may exhibit erratic transport operation, near ends of tape as deck is optimized for 7 reels)

Frequency response (+/-3dB): 30Hz to 22,000Hz @ 7-1/2 ips
40Hz to 18,000Hz @ 3.75 ips
40Hz to 9,000Hz @ 1 7/8 ips

Wow and Flutter (weighted): 0.06% @ 7.5 ips & 0.11% @ 3.75 ips
Speed Variation Tolerance: +/- 0.7%
S/N ratio (weighted): 65 dB @ 7.5ips
THD (max at tape): 0.2% @ 1kHz & 19cms
Crosstalk (in stereo): >50dB @ 1kHz

Line; 30mV-5V /200
Output Level Reference / Maximum: Line; 1.5V / 150Ω
Headphones; ~5mW / 8Ω, 1/4" / 6mm diam. jack

This is a GREAT looking deck and is mounted in the original, 'REAL TEAK WOOD VENEER' side panels, and again the deck looks great, and following above extensive tech work, it works fabulously!!!
All of our restored / refurbished reel to reel decks come with a 7", plastic take-up reel, a 'known good' 5" Maxell UDXL PB tape (made on this deck) for initial testing of playback, and a 7" tape you can record onto, all to assist you in becoming familiar with the operation / function of your new reel to reel tape deck.
Measures 15.75" wide x 16.2" tall x 7.25" deep and weighs 35 lbs unpacked. Comes with an 'e-copy' / pdf download of the Tandberg 9100X owners / operations manual. Includes our standard 90 day limited warranty.
(Reels & tape shown in photos not included. All are sometimes available separately if you need them. We do ship our decks with a plastic take-up reel, a tape to 'practice record' on and a 'pre-recorded' tape for playback.) 
TANDBERG X9100
Cond. 8.5+++++


SOLD 10/12/2020
SHIPPING TO ALAN IN VIRGINIA


(Reels shown in photos are not included, but we sometimes / occasionally have them for sale. Inquire at time of order.
However, all of our decks will come with 2x tapes for testing 'Playback' (actually made on this deck) and 'Recording' as well as a 7" 'take-up' reel, and RCA patch cables for connection to your system)

 
 (Above text property of www.oaktreevintage.com / Oak Tree Enterprises, LLC. See 'Copyright Information' page for details)
 

 

  

     

NEW LISTING 9/19/2020
(Click on above thumbnails to enlarge photos)

CheckMarkSmall_web.jpg (792 bytes) warranty
RESTORED / REFURBISHED / FULLY SERVICED
SONY REEL-TO-REEL 1/4" STEREO TAPE DECK
SONY TC-377 / TC377
4-TRACK / 2-CHANNEL
3-SPEED / 3 HEAD (F&F HEADS!)
"LOCKING SPINDLES"!!!
3"- 7" REEL CAPACITY
#...7072
Circa 1972-77

SOLD 10/7/2020
SHIPPING TO MARK IN VERMONT


Of the many Reel to Reel Tape decks built by Sony, especially from the late 1960s and into the early 70s, this has always been one of our favorite machines for Features, Build quality (that by luck, lends itself well to restoration 50 years later), solid and most importantly DEPENDABLE performance, and consistent sound quality.
 
 Our technician has completely gone through and 'Certified' this unit.

 Entire transport was disassembled down to the chassis, and every mechanical part including head block assembly, was cleaned of "varnished" lubes and re-lubed as well as the always at issue on most Sony's of this era, Pinch Roller plunge assembly, re-lubed and reassembled.

 All Drive and counter belts replaced for trouble-free service. Rubber pinch roller has been reconditioned, as well as all three internal drive tires / wheels for positive grip, capstan burnished.

 Supply (left) reel spindle lock replaced from another unit we purchased for that and a couple other parts as the original had a small, almost invisible crack in it.

 Both reel hubs / clutches removed, disassembled and cleaned.

 All hub brake pads have been replaced, and their bearings re-lubed and adjusted on fast wind modes also.

 Motor has been re-lubed as well.

 Internal voltage is self regulated DC and values were verified.

 All Internal & External pots, controls, & switches (including the linear 'record' switches) cleaned and tested for noise-free function.

 Both spindles in perfect alignment (originally were not, and were off a few degrees from perpendicular).

 We also adjusted the reel table heights for no "reel rub".

 Pinch roller reconditioned / re-surfaced.

 Initial 'less than stellar' recording performance on one side was traced down to a bad, 19V Zener diode on the power supply board, causing it to supply ~5V instead of it's intended +25VDC. Once replaced, we had full voltage to the record amplifier and was then able to adjust record amp to intended levels.

 New VU meter illumination lamp installed and both record indicator lamps test fine.

 Internal 'Bias', 'Record-Level', 'Record EQ' and 'PB' micro-pots cleaned EXTENSIVELY and levels adjusted with proper test tapes.



 Heads were cleaned and de-magnetized as well as the entire transport.

 Ferrite and Ferrite heads all in great shape, with many years of performance left in them. (technicians note: "heads appear 'un-used'. They're the best we've ever had on a deck and look NEW!")

 Head alignment / azimuth has been checked for peak performance with factory test tone tape and oscilloscope at 100Hz, 1kHz and 10kHz.

 Both level meters adjusted for even playback level w/ factory test tone tape.

 Floor noise tested to -60Dbm w/ fresh, blank tape on PB.

 Entire face plate replaced with a cleaner example from a donor unit as well as the originally scratched / scuffed head cover

 Plays and Records GREAT @ 0dB / 1kHz on High Bias tape (Maxell UDXL).


 Speed checked once 'warmed up', to 98.23% accuracy. (Meaning a 'factory' 1kHz tape plays back at 1018Hz. The last on of these we had in 2014 tested to just over 95% accuracy, which is just at the limit of passing our bar) (tech note: has Sony #0 motor / belt pulley installed from factory)

 Following the above procedures, entire unit was detailed inside and out

Again, Pinch roller and Heads all in GREAT condition.

(Total time investment in refurb / testing
~ 21 hours).
Cosmetically in fabulous condition!
  ____________________________
   
GREAT performing Sony TC-377 1/4" Open Reel to Reel stereo tape Record / Play deck and has all 3 consumer speeds! Good for reel sizes up to 7" in diameter. Great for burning your tapes to CD or Hard Drive or for making new tapes. Also great for having fun in your project recording studio.
As stated earlier our technician noted that the heads were in essentially new condition. He further stated on the work sheet, "overall, the deck shows little use, and was remarkably, actually functional prior to tear down." (a 45 year old deck that still functions prior to a restoration, would be classified as "remarkable")
Sony TC-377 Features include:
   
- Triple speeds @ 7.5 ips / 19cms, 3 3/4ips / 9.5 cms and extra long 1 7/8 ips / 4.75 cms
- 3-Heads for instant monitoring of tape levels / record quality while recording
- Plays up to a 7" reel as well as 3" & 5" reels
- Playback / Recording of either stereo or mono tapes
- "F&F" Ferrite & Ferrite Heads (super hard heads to prevent un-even headwear and maintain a perfectly parallel gap for preserving top end in recordings)
- Separate L & R Signal Input level controls
- Separate L & R Microphone level controls
- Auto-Stop
- Dual analog VU meters for monitoring Playback and Record levels
- "Sound-On-Sound" capable w/ independent L & R record Source / Monitor engage switches
- Tape 'Echo' effect capable
- Built-in Tape Type selector for normal or "Low Noise / Extended Headroom" tapes
- Dual front mounted 1/4" mic input jacks
- 1/4" Stereo Headphone jack
- Mechanical Tape counter
- Variable Output level control located near I/O ports
(one of the most important features on a deck in our opinion. Allows you to match volume level of other sources, allows adjustment for 'best' pre-amp input to avoid distortion, allows you to change the volume of the deck if you have it located remotely from the pre-amp / receiver as I do, and many other applications)
- Lockable Pause "Inst-Stop" lever
- Mic Attenuator selector
- RCA inputs and outputs
- Spring loaded tape hub spindles (no need for rubber reel retainers)
- Can be mounted in cabinet for 'vertical' orientation (as currently installed) or inverted for 'horizontal' use.
- 3-Prong, Grounded AC cord

   
Original Sony TC-377 Tape Deck Specifications:
 
(All with Sony SLH-180 type tape)
 Power Requirements:  117 VAC, 30 watts, 60 Hz     

 Capstan Drive Motor Type: Induction
 Tape Speed: 7.5 ips / 19cms, 3 3/4ips / 9.5 cms and extra long 1 7/8 ips / 4.75 cms mechanically switched with single lever, with automatic switching for equalization changes       
 Reels: 1/4" tape on 7 inches ог smaller
 Recording Format: 4-track stereophonic оr monophonic
 Frequency Response: 30-25,000 Hz @ 7 1/2ips.
                                  30-20,000 Hz @ 3 3/4 ips.
                                  30- 9,000 Hz @ 1 7/8 ips.
 Signal-to-Noise Ratio: > 55 dB @ 7 1/2 ips w/ high bias tape
 > 52 dB @ 7 1/2 ips w/ normal bias tape
 Flutter and Wow: < 0.09% @ 7 1/2 ips.
                          < 0.12% @ 3 3/4 ips.
 Level Indication: Dual Analog VU Meters
 Record: Calibrated to NAB standard reference level

 Playback Time: With 1,800' tape
 (4-track stereo)  (4-track mono) 7 1/2 ips  1 hr. 30 min.                  / 3 hr. & @ 3 3/4 ips. 3 hr. / 6 hr.
 Inputs: Dual 1/4" Microphone Input Jacks and dual RCA jacks
 Outputs: Dual RCA jacks
 Output Impedance: 10kΩ
 Line Input Sensitivity: .06 Volts
 Line Input Impedance: 100k
 Bias Frequency: 160 (kHz)
 Rewind Time w/ 1200 Tape:- 120 sec
 

Again, following the above stated bench work / testing, our technician has 'Certified' this deck and it is an great performer sonically and mechanically. This deck has had typical restoration. It's pretty much had the clock rolled back 45+ years on it. With the exception of a couple small veneer chips on the two, front, lower edges, and 'light' scuffing from the perimeter of a previously installed metal reels on the face, (see photos above {the reel scuffs don't really show up for photos}) the units looks fabulous. Again, over and above our standard restoration, this deck has virtually NEW heads!
Machine is READY TO GO! Would make a great deck for any one needing a deck to do tape to CD or Hard Drive transfers of reel to reel tapes or for making NEW reel tape recordings. Comes with an 'e' copy / pdf of the Sony TC-377 owners / users manual. Includes a take-up reel. Includes our standard 90 day limited warranty. Measures 16.25" wide x 8.5" deep x 15.75" tall and weighs 24 lbs unpacked.
(Reels & tape shown in photos not included. All are sometimes available separately if you need them) 
SONY TC-377 REEL TO REEL TAPE RECORDER / DECK #...7072
Cond. 8.5 (only due to a couple small veneer chips)

SOLD 10/7/2020
SHIPPING TO MARK IN VERMONT


(Reels shown in photos are not included, but we sometimes / occasionally have them for sale. Inquire at time of order.
However, all of our decks will come with 2x tapes for testing 'Playback' (actually made on this deck) and 'Recording' as well as a 7" 'take-up' reel, and RCA patch cables for connection to your system)

(Above text, in it's entirety, property of www.oaktreevintage.com / Oak Tree Enterprises, LLC. See 'Copyright Information' page for details)

 

 

  

       

 

NEW LISTING 9/19/2020
(Click on above thumbnails to enlarge photos)

CheckMarkSmall_web.jpg (792 bytes) warranty
RESTORED / REFURBISHED / FULLY SERVICED
VINTAGE SONY REEL-TO-REEL 1/4" STEREO TAPE DECK
SONY TC-366 / TC366
4-TRACK / 2-CHANNEL STEREO OR 1-CHANNEL MONOPHONIC
3-SPEEDS / 3-HEADS

"SOUND ON SOUND" CAPABLE

3"- 7" REEL CAPACITY
#...8751
Circa 1972-77
"WORLD AC POWER"

SOLD 10/7/2020
SHIPPING TO RAY IN TEXAS



 Our technician has completely gone through and 'Certified' this unit.
 
 Adjustable input voltage verified correct for North American AC current

 We have completely and extensively gone through the mechanicals and electronics of this unit.

 AC power cord replaced

 Entire transport was disassembled down to the chassis, and every mechanical part, including head block assembly was cleaned of "varnished" lubes and re-lubed as well as the always at issue, Pinch Roller plunge assembly, re-lubed and reassembled.



 All internal drive tires / wheels burnished / conditioned for positive grip
 
 Capstan burnished.

 Both Tape Counter belts (#031 & 042) replaced for trouble-free service.

 Both 'Main Drive' belts (#157 & 232) replaced.
 
 Both reel hubs / clutches removed, disassembled and re-lubed.
 
 All hub brake pads / linings REPLACED, and their bearings re-lubed and adjusted on fast wind modes also.
 
 Motor has been re-lubed as well.
 
  Internal voltage is self regulated DC and values were verified. (Tech note: This particular unit, Sony TC-366 #8751 has the updated power supply circuit board, per recall notice in service bulletin, installed. We further, updated the Electrolytic Capacitors on the board.)
 
 All Internal & External pots, controls, & switches (including the linear 'record' switches) cleaned and tested for noise-free function.

 
 Both linear record switches removed and cleaned.

 
 All 'slide' switches cleaned.

 Both spindles in perfect alignment.
 
 We also adjusted the reel table heights for no "reel rub".
 
 Pinch roller reconditioned / re-surfaced.
 
 VU meter illumination lamps all working fine.
 
 Internal 'Bias', 'Record-Level', 'Record EQ' and 'PB' micro-pots cleaned EXTENSIVELY and levels adjusted with proper test tapes.


 
 Heads were cleaned and de-magnetized as well as the entire transport.

 Head alignment / azimuth has been checked for peak performance with factory test tone tape and oscilloscope.
 
 Both meters adjusted for even playback and Record levels w/ factory test tone tape.

 Floor noise tested to >-60dB w/ fresh, blank tape on PB.
 
 Plays and Records great. 1kHz @ -1dB Plays back @ 0dB on L and 0dB on R +/-3dB w/ Maxell UDXL tape. (We got the best results using Maxell UDXL tape).
 

 Speed checked to 99.2% accuracy. (Meaning a 'factory' 1kHz tape plays back at 992Hz. The last on of these we had in 2014 tested to just over 95% accuracy, which is just at the limit of passing our bar) (tech note: has Sony #-05 motor / belt pulley installed from factory)
 
 Following the above procedures, entire unit was detailed inside and out
 
 Again, Pinch roller and Heads all in GREAT condition.
 
 
(Total time investment in refurb / testing ~
21 hours).
 Following cosmetic detailing, it looks in great condition.
 ____________________________
 

Nice performing Sony TC-366, 3-Speed, 3-Head, 1/4" Open Reel Stereo tape Record / Play deck. Great for all-around Recording and Playback of reels up to 7" in diameter. Also has all three consumer reel speeds as you will see listed below. 3-Head monitoring allows you to make the best quality recordings with no second guessing of tape levels since you can instantly check the recording a split second after it is made. Following it's extensive refurbishment, this deck works great, sounds wonderful, and looks fine! Our tech is VERY good at restoring these Sony Reel to Reel's, and this one is a fine example of his efforts.
 
Sony TC-366 Features include:

- Dual Speed transport supporting 3 3/4 ips and 7 1/2 ips
- 3-HEAD tape monitoring (a very high end feature for checking recording quality as the tape is actually being recorded)
- Plays up to a 7" reel as well as 3" & 5" reels
- Separate L & R / Front input level controls

- Sound-on-Sound (if you're versed at using that style of recording, or educate yourself on it via the included manual)

- As well as '2-Channel / Stereo' recording / Playback, the TC-366 can also record / Playback, 4-Track / Single-mono track tapes.
- Sound-on-Sound recording (as it has independent record switches)
- Auto-Stop
- Dual analog VU meters for monitoring Playback and Record levels
- Separate Mic and Line input level controls
- Built-in Noise Suppressor
- Tape Type selector for Normal or 'Special' Bias
- Dual front mounted 1/4" mic input jacks
- 1/4" Stereo Headphone jack
- Mechanical Tape counter
- RCA & DIN inputs and outputs
-True WORLD AC POWER  allows unit to be operated on 50 or 60 Hz AC and will select voltages from 110v, 120v, 220v and 240 volts AC input.

Original Sony TC-366 Tape Deck Specifications:
  
(All with Sony SLH-180 type tape)
Power Requirements:  117 VAC, 30 watts, 60 Hz (but can be set to different voltages. "50Hz" would require a 50Hz spindle pulley)

Capstan Drive Motor Type: Induction, 'vibration free'
Tape Speed: 7.5 ips / 19cms, 3 3/4ips / 9.5 cms
Reels: 1/4" tape on 7 inch diameter ог smaller
Recording Format: 4-track Stereophonic оr monophonic
Frequency Response: 30-25,000 Hz @ 7 1/2ips.
                                   30-17,000 Hz @ 3 3/4 ips.
                                   30- 9,000 Hz @ 1 7/8 ips.
Signal-to-Noise Ratio: > 55 dB @ 7 1/2 ips w/ high bias tape
  > 52 dB @ 7 1/2 ips w/ normal bias tape
Flutter and Wow: < 0.09% @ 7 1/2 ips.
                           < 0.12% @ 3 3/4 ips.
Level Indication: 2x Analog VU Meters
Record: Calibrated to NAB standard reference level
Inputs: 4x 1/4" Microphone Input Jacks and 4x RCA jacks
Outputs: 4x RCA jacks
Output Impedance: 100kΩ
Line Input Sensitivity: -22dB / .06 Volts
Line Input Impedance: 100k
Bias Frequency: 160 (kHz)
 

 Again this deck has been completely gone through and everything works great! Exceptional performer sonically in both playback and record modes (and we are pretty critical). Comes with an 'e-copy' / pdf download of the Sony TC-366 owners / operations manual. Comes with one pair of correct and original SONY rubber reel retainers with Sony's metal clip inserts. Includes our standard 90 day limited warranty.  Measures 17" wide x 9.75" deep x 18.75" tall and weighs 28 lbs unpacked. 
(Reels & tape shown in photos not included. All are usually available separately if you need them)
SONY TC-366 REEL TO REEL
Cond. 9

SOLD 10/7/2020
SHIPPING TO RAY IN TEXAS



(Reels shown in photos are not included, but we sometimes / occasionally have them for sale. Inquire at time of order.
However, all of our decks will come with 2x tapes for testing 'Playback' (actually made on this deck) and 'Recording' as well as a 7" 'take-up' reel, and RCA patch cables for connection to your system)


 
 
(Above text property of www.oaktreevintage.com / Oak Tree Enterprises, LLC. See 'Copyright Information' page for details)

 

 

     

       


NEW LISTING
(Click on above thumbnails to enlarge photos)
CheckMarkSmall_web.jpg (792 bytes) warranty
FULLY SERVICED / REFURBISHED
CLASSIC / SEMI-PRO TEAC MULTI-TRACK REEL TO REEL TAPE DECK
TASCAM SERIES
TEAC / TASCAM 40-4 4-TRACK TAPE DECK
4-TRACK / 4-CHANNEL STEREO /
*QUADRAPHONIC / MONO
3-HEAD / 2-SPEED / 3-MOTOR
10.5", 7" REELS AND / OR
**
SMALLER
'SIMUL-SYNC'
MULTITRACK 1/4" TAPE DECK
#....7241
MIJ
Circa 1978-81
SOLD 8/19/20
SHIPPED TO PETER IN CALIFORNIA


 Our technician has completely gone through and 'Certified' this unit.

 We have completely gone through the mechanicals and electronics of this unit.

 All Power supply outputs tested and verified at spec.

 Transport mechanisms disassembled, cleaned, lubed w/ 'SuperLube', silicone based gel and light machine oil as necessary and reassembled including PR Pivot Arm mechanism.



 Tape Tension arms disassembled, cleaned and re-lubed, and had fresh 300,000 grade silicone lube gel applied

 Replaced both reel tables / spindles

 Tape Left Tension arm had extra spring tension added for better performance on tape handling

 Capstan flywheel removed, cleaned bushings and axels cleaned and re-lubed w/ 80-90W gear oil. Flywheel surface burnished.

Capstan Motor re-lubed (has 'oil tubes')

 Capstan cleaned and burnished in drill press while removed

 Pinch-roller mechanism completely disassembled, cleaned and re-lubed.

 Rubber pinch roller removed, re-surfaced, conditioned and re-installed with fresh lubricant.

 Impedance roller had both its end bearings removed and new ones (#626) pressed in for silent tape transportation.

'Main' / Capstan belt reconditioned.

 Fresh, new counter belt (#049) installed.

 Heads have been cleaned and de-magnetized as well as the entire transport.

 Brakes adjusted on fast wind modes also (optimized for 7" & 10.5" tape.)

 Back tension checked / adjusted on both reel motors.

 All three motors test perfectly. Following above adjustments, Reel Start and Stop tested at beginning, middle and end of 7" & 10.5" tapes (VERY QUICK 'FAST WIND' ON THIS ONE)

 Both spindles in perfect alignment w/ no 'run-out' at any speed.

 Both spindle-locks hold tightly.

 We also adjusted the reel table heights.

 Heads in great shape as well, with lots of performance left in them

 Removed and burnished COMMONLY INTERMITTENT contacts on channel Circuit Boards and re-seated. Adjusted pin contacts for better connections. Was discovered that these connectors was the source of channel intermittence.

 All meter lamps replaced #25-455

 Both 'Counter' lamps replaced #A403

 All 'internal' / PC mounted pots, switches and controls cleaned and tested for noise-free function

 All 'User' pots, switches and controls cleaned and tested for noise-free function


 Playback and Record Head alignment / azimuth was adjusted for peak performance with factory test tone tape and oscilloscope.

 We adjusted the VU meters mechanically for correct 'resting position' and electronically w/ factory test tone tapes, as well as the internal playback, Monitor levels, and record levels utilizing STL test / alignment tapes.

    


 We adjusted the Bias for great sound with Ampex GM-456 tape.

 Speed tested to 99.9% accuracy following refurb (meaning that our 'verified' 1000Hz accuracy using a 1000 Hz STL test tape.  (test tape now plays back at 999Hz when warmed up).


 
 Adjusted to record AMAZINGLY WELL at 0dB both with full bandwidth Pink-Noise, then 1kHz test and in 'Real World' use w/ 'mixed DDD CD' signals. (Tested with Maxell UDXL Tape and Ampex GM-456 (best results with Ampex GM-456).

 Floor noise measured at >-60dBm w/ blank tape, L&R

 Following refurb / service mechanicals tested for 'play torque' at beginning and end of largest size reels, as well as 'Fast wind torque' and 'braking tension' in both FF and REW, at beginning, middle and end of tapes. In other words, every combination of transport function was tested and passed.

 This TEAC / TASCAM 40-4 functions, plays, and records VERY WELL (and we really put them through the paces, testing both with well mixed, recently recorded CD material and CD recorded / factory test tones looking for correct head Azimuth and speed accuracy).  (Total time investment in refurb / testing ~ 24 hours).

 This deck had been rack-mounted so it arrive with NO side panels. We sourced a pair later (took about a year of looking / waiting)

This is an amazing deck for both recording or playback, again of Multi-Track / Four-Track / Four-Channel / Stereo /
**Quadraphonic / Mono' tapes for speeds of 7.5ips or 15ips. Following refurbishment, the deck looks and works great and sounds amazing!!! 

The encore to the TEAC / A-3440, the TEAC / TASCAM 40-4 Multi-Track / Four-Track / Four-Channel / Stereo / Quadraphonic / Mono (Yep, that pretty much covers everything but 'half-track') Reel to Reel tape deck. Ready to GO! We've had this deck in our warehouse for years, waiting for a 'senior tech' who was qualified to the task of bringing such a deck back to life CORRECTLY. One of a recent few, we've had make it through satisfactorily in 24+ years of dealing in vintage audio.

This is the deck that most folks want for their home studio to record 'raw tracks' on. For examples; you could lay down bass and drums on one track, then rhythm guitar on the next track, lead guitar on track 3 and vocals on track 4. Or you can lay down tracks 2-4, then bounce them to track 1 and have 2, 3 & 4 free again. Or you can records 'heads-up' (all four tracks at once), then mix those down later. Of course, you can record 'normal stereo' tapes, or you can record 4 separate mono tracks if you're trying to conserve tape. Or, Or, Or...

 Following our extensive refurb / bench time it's now an AMAZING performer (Check the 'recording test results' above and the 'specs' in text below). If you're looking for a reel to reel deck to "actually use" here you go. Only about 25% of the used Reel decks out there can be "practically" restored to working order. This one made it through with flying colors after about
24 hours of bench time.

From the original TEAC / TASCAM 40-4 brochure:
They are ideal for a wide spectrum of uses: tracks for a record album, making commercial spots, or doing production work in radio, TV or Film. You can make superior recordings with these easy to operate recorders, and you get the quality and reliability for which TEAC is known. (of course as it does all of those professional tasks, it can certainly do anything you need at home).

The deck tests great! Cosmetically it's in good condition. Cosmetic issues worth mentioning would be a veneer chip to the lower, left side panel, some scuffs / striations to the rear edges of the side panels, a note-worthy ding to the upper right side panel corner, a small 'dent' in the faceplate near the right tension arm. As we stated earlier, the deck had been rack-mounted so it arrived with NO side panels or rear sheet metal. Sometime in the past, an 'accessory' port was drilled in the rear panel, that is no longer utilized. Also, as it had been rack-mounted, there's no 'plastic' skids installed on the bottom (even though they're shown in one photo, those were from a previous deck), just 'felt feet'. We sourced all of it later from another deck we purchased. (see photos above). Functions and sounds great ! Will play up to 10.5" reels.

TEAC / TASCAM 40-4 Features include:

- Multi-Track / 4-Track / 4-Channel Stereo / Mono head stack / tape format
- DURABLE AC powered capstan motor (lasts decades longer than DC capstan motors of the 'later' models)

**(Can also play 'Quadraphonic' tapes as long as your tapes are 7.5 or 15 ips. Of course you can record 'Quadraphonic' tapes as well if you have the supporting resources)
- 3 Heads for instant monitoring of tape levels while recording
- 10.5" Max Reel Capacity (The BIG Reels!)
(*but could play down to 3", however the torque and brakes are optimized for 10.5" reels) (when in "fast wind" mode, it is sometimes necessary to switch to "Large Reels" when utilizing 7" or smaller reels to keep tension arm from moving to 'auto-shut-off' position)
- Punch In / Punch Out Function
- 3 Motors (means less 'Rube Goldberg' mechanisms inside like many R2R's)
- IC logic tape transport for "Touch" control
- Dual speeds at 15ips / 38cms & 7.5 ips / 19cms
- Multi-Track / Sound-on-Sound / Sound-with-Sound / Duet recording capable
- Cue Lever with 'variable pressure' for lifting tape away from head in Fast Wind modes or for moving tape close enough to head to monitor fast wind progress
- Output selector for Input, Norm or Monitor (this feature will require an understanding of the 'user manual')
- Play / Pause control lets you manually rock the reels back / forth while you listen to pinpoint an exact point for editing. (also if youre the DJ type, you can also use this feature to scratch-n-sniff just like on your records. Can you say, Yipeeee! ?... Oh sorry, I mean, Yo Dog)
- Reel Size selector for proper tape 'back tension' and braking.
- Variable Input level control for each channel
- Analog VU level meter for each channel
- Analog Tape Counter
- Spring loaded reel spindles (no need for 'rubber stoppers / reel clamps')
- RCA Line I/O's for all channels
- Accessory connectors for optional TEAC Remote control (not included, nor currently available)
- Multi-pin logic connector for external dbx unit (not included, nor currently available)


TEAC / TASCAM 40-4 Specs / Specifications:

Track / Head / Head-stack Format: 3 heads, inline (4-track / 4-channel, stereo/monaural system) Ferrite Erase and 'Permalloy' Record and Playback heads
Motors: 3X. Capstan motor: 4/8 pole, large size Hysteresis synchronous. Reel motors: 6-pole, eddy current
Reel Size: Acceptable 7 & 10.5" (3" & 5 reels may not brake correctly as deck is optimized for 7-10.5" reels)
Tape Speeds: 15 ips / 38cms & 7.5 ips / 19cms
Tape Speed accuracy: 0.5%
Frequency Response in Sync mode:
40-20,000 Hz @ 15ips.
3dB
25-15,000 Hz @ 7 1/2ips.
3dB
Wow and Flutter: 0.04% @ 15ips & 0.06% @ 7.5ips (NAB)
S/N ratio: >65Db @ 15ips / Wtd
Crosstalk; >50dB down adjacent track @ 1kHz
Erasure Depth; >65 @ 1kHz +10dB
THD: <1% @ 0VU & @ 1kHz. 3% @ +9VU & @ 1kHz
VU Meters; approx; -25dB to +5dB VU range
Bias Frequency; 100kHz
Line Input (AUX input): -10dB (0.3V) nominal /  Impedance 20kΩ
Record Level Calibration: 0 VU reference is 250 nWb/m tape flux level; adjustable LEDs preset to turn On at signal level of +10 VU.
Line Output: -10dB (0.3V) nominal & -+18dB (8.0V) nominal /  Impedance 10kΩ unbalanced
Fast Wind Time: Approx 120 Seconds for 10.5" reel / 2400' & approx 140 seconds for 1800'
Start Time (stop to full motion play): .05 sec @ 15ips & .04 sec @ 7.5 ips

As stated earlier we have EXTENSIVELY gone through it cleaning heads and all else, lubing, adjusting, reconditioning pinch rollers and other rubber parts, demagnetizing heads and entire transport and testing everything. Tape speed tested and resulted in 99.9% accuracy using a 1000 Hz STL test tape. Plays and records Exceptionally well (and we really put them through the paces, testing both with well mixed CD material and CD test tones looking for correct head Azimuth, tape speed accuracy and making test recordings. Again, check the 'test results' listed above). Pinch rollers and heads all in GREAT condition!!! As stated earlier, cosmetic issues worth mentioning would be some light scuffs on the face panel, between the reel tables and a few, typical nicks to the wood grain side panes, and a small nick to the head cover (see photos above).

This is a highly sought after deck and now, following the extensive service, with UNBELIEVABLE PERFORMANCE.
This was not only a GREAT 'Musicians' deck, as a performer could 're-visit' their old band tapes to transfer to computer, DAW, or 'Stereo Mix Down', but since it also does standard 'Stereo' playback, Mono and even Quadraphonic (Quadriphonic) playback, it's about as versatile as you can get. Also would be a great deck for a 'media transfer house / business' that has clients with old 'band tapes' that they want to get mixed down to stereo.
All of our restored / refurbished reel to reel decks come with a 7", plastic take-up reel, a 'known good' 7" tape for initial testing of playback, and a 7" tape you can record onto, all to assist you in becoming familiar with the operation / function of your new reel to reel tape deck.
Comes with an 'e-copy' / pdf download of the TEAC / TASCAM 40-4 owners / operations manual. Measures 21" tall (with skids installed) x 17.3" wide (w/ wood side panels installed) x 21.5" tall x 12" (from tip of back feet-tip of hubs) deep and weighs a
VERY HEAVY 72+ lbs unpacked. Includes our standard 90 day limited warranty.
(Reels, tape and any NAB hubs shown in photos not included. All are sometimes available separately if you need them. We do ship our decks with a plastic take-up reel, a tape to 'practice record' on and a 'pre-recorded' tape for playback.) 
TEAC / TASCAM 40-4 MULTI-TRACK / STEREO / MONO REEL TO REEL TAPE DECK
Cond. 8.5

SOLD 8/19/20
SHIPPED TO PETER IN CALIFORNIA


(ONE MORE remaining in stock)


(Reels, tape and any NAB hubs shown in photos are not included, but we sometimes / occasionally have them for sale. Inquire at time of order.
However, all of our decks will come with 2x tapes for testing 'Playback' and 'Recording' as well as a 7" 'take-up' reel, and RCA patch cables for connection to your system)


 
 (Above text property of www.oaktreevintage.com / Oak Tree Enterprises, LLC. See 'Copyright Information' page for details)

(Due to it's size and weight, it runs a bit more for shipping relative to other (consumer) reel to reel machines)

 

 

  

         

NEW
LISTING 5/16/20

(Click on above thumbnails to enlarge photos)  warranty
CheckMarkSmall_web.jpg (792 bytes)  warranty
RESTORED / REFURBISHED / FULLY SERVICED
VINTAGE AKAI REEL TO REEL TAPE DECK
AKAI X-1800SD (TYPE-C)

COMBO REEL / 8-TRACK CARTRIDGE
4-TRACK / 2-CHANNEL STEREO or 4-TRACK / 1-CHANNEL MONO 
AKAI's "CROSS-FIELD
" BIAS HEAD
4
*
-SPEEDS
1/4" REEL TO REEL
BUILT-IN AMP AND SPEAKERS
#...3560
MIJ
  
"
WORLD AC POWER"
Circa 1970-72

SOLD 5/26/20
SHIPPED TO BOB IN COLORADO


 Our technician has completely gone through and 'Certified' this unit.

 We have completely and extensively gone through the mechanicals and electronics of this unit.

 Entire transport was disassembled down to the chassis, and every mechanical part was cleaned, de-greased, and re-lubed including; Pinch Roller Pivot Arm, EOT Sensor Arm, Left Tape Tension arm mechanism, Capstan Motor (disassembled, cleaned and re-lubed w/ 30wt), Capstan and flywheel shaft removed cleaned / re-lubed w/30wt (pretty much every moving part)

 Transport cams checked for usable condition prior to any work starting (here in the West, we have less of an issue with the typical deterioration that you see in more 'humid' climates such as the Mid-West, South and Coasts (be very careful getting an Akai from the early to mid 1970's that has spent most of it's life in a 'humid' environment).

 Entire 8-Track transport assembly was removed and disassembled for service, including burnishing it's connector, and track selector contacts.



 Motor completely disassembled, cleaned, & re-lubed

 Voltage re-set to correct 120VAC

 Circuit board edge card contacts and connectors burnished w/ solvent and fiberglass pen



 Tape Tension arms disassembled, cleaned and re-lubed, and their springs adjusted

 Reel table height correct

 pinch-roller 'arm' mechanism completely disassembled, cleaned and re-lubed

 Capstan / flywheel removed, bushings and axles cleaned and re-lubed and flywheels burnished

 Capstan motor pulley burnished

 Capstan cleaned (as well as the internal and external surfaces of the original speed sleeve)

 ALL Internal idler tires cleaned / reconditioned

 Rubber pinch roller removed and re-conditioned

 New MAIN drive belt, #FR13.4 installed

 Brand new counter belt, #047 installed

 Repaired faulty motor 'Speed Switch' that was causing motor run intermittency

 Repaired damaged internal wire insulation from previous service

 Repaired Tape EQ switch

 Repaired Cart / Reel selector switches

(Note; these units have numerous internal switches other than what seems to be the obvious / visible ones upon initial disassembly. Most switches have ADDITIONAL switches located further inside unit, connected with linkages that also must be serviced. We've done a few of these now, and you learn.)

 Replaced 'Track Change' relay, 1000uf electrolytic capacitors on 8-track transport board for quieter track changes

 Heads have been cleaned and de-magnetized as well as the entire transport (reel and 8-Track Cartridge).

 Brakes adjusted on fast wind modes at ALL points thru a tape. It's a fine line between having the brakes actuate with too much tension, 'abruptly' stopping the tape (risking stretching / breaking of tape) or too loose (allows tape to 'dump'). (VERY difficult to do on this series). Brakes optimized for 7" reels.

 Motor torque test perfectly. Following above adjustments, Reel Start and Stop tested at beginning, middle and end of 7" reels.

 Internal pots, switches (including linear record switch and 'rotary wafer' switches) and controls cleaned and tested for noise-free function (initially, of course, had typical static / noise which is to be expected in an 'un-serviced' deck after 45+ years) (also a bit easier on this "Type-C" version. Just FYI).

 External / User adjustable pots, switches and controls cleaned on the playback / record amp and tested for noise-free function

(tech notes; Line out set to 0dB using 0dB reference @ 700Hz. Vol controls @ approx 1:30)

 Replaced VU meter lamps / bulbs #25-080

 Cleaned 8-Track cartridge heads

 We adjusted the VU meters mechanically and electronically w/ factory test tone tapes, as well as the internal playback levels for both directions independently and record levels.

 We adjusted the output, 'Minimum Input', 'Specified Input', 'Record Level' and 'Bias' all to spec, then further adjusted 'Bias' for Ampex GM-456

 Both spindles in perfect alignment.

 Heads in great shape as well, with many years of performance left in them

 Playback and Record Head alignment / azimuth was adjusted for peak performance with factory test tone tape and oscilloscope.

 Speed tested to 99.3% accuracy following refurb (meaning that our 'verified' 1000Hz test tape now plays back at 1007Hz +/- 2Hz. {well within spec by 7Hz!}).
 
 Reel Tape deck adjusted to record VERY WELL. Biased for Ampex GM 456 studio tape @ 0dB!!!

 'Real World, DDD CD recorded sounds great w/ Ampex GM456.

 'Electronic' Floor noise measured at >-60dB w/ blank tape, L&R.

 Motor had a slight amount of run-out detected at the belt pulley (side to side movement / play) which causes excessive, ambient noise, so we swapped it with another of the exact motor (we had a 'donor unit'), which was then also, completely disassembled, cleaned and lubed w/ 30W.

(tech notes; internal amp tests well w/ ~ 1mVDC across outputs w/ 8 Ohm load. Also as a side note, the Akai X-1800SD C-Type utilizes the same output transistors as the later Akai X-1810.)

 This AKAI X-1800SD functions, plays, and R2R portion records VERY WELL (and we really put them through the paces, testing both with well mixed, recently recorded CD material and CD recorded / factory test tones looking for correct head Azimuth and speed accuracy). Unfortunately, while the "8-Track" tape deck plays VERY WELL, we were not able to get it to record, and didn't want to 'chase' it indefinitely thus raising the final price disproportionally (Total time investment in refurb process / and final testing ~ 32 hours).

The AKAI X-1800SD Stereo Reel to Reel tape deck. Ready to GO! This is one of the few reel to reel decks we get in that make it to our finished page. Great performer. If you're looking for a reel to reel deck to "actually use" here you go. Only about 25% of the used Reel decks out there can be "practically" restored to working order. This one made it through with flying colors after about 21 hours of bench time.

Following mechanical / electronic refurb, entire unit was cosmetically detailed inside and out. Face is made of aluminum and is dent free and in great condition. Cabinet covered in real TEAK wood veneer, is in decent condition with just a few 'battle scars', mostly to the 'top' side of the wood case (see photos above) and just had a fresh coat of Howards 'Restore a Finish' and followed Howards 'Feed-n-Wax'. All the case hardware intact and working, and had all it's fasteners torqued down. Deck looks and sounds great! 
   ____________________________
   
Looks great & "Ready-to-go"  AKAI X-1800SD Stereo Reel to Reel tape deck. Very 'famous' and popular reel tape deck. Many of the folks stationed overseas in the military during Viet Nam that purchased a Reel to Reel came back with an 1800SD (or one of it's siblings). Unfortunately of course, 50 years has not been kind to Akai Reel decks (or any electro-mechanical devices that are 20 years old or older). The internal lubes were never meant to last that long, certainly without maintenance, and 'rubber' doesn't 'age well' either, thus requiring the above stated work. There's also the Akai Transport cams that need to be inspected for their degree of condition and replaced if necessary (difficult and potentially expensive). We've already inspected them for any detrimental issues and certified them ready to go. Will play & Record stereo 1/4" tapes on reels up to 7". This is one of the few reel to reel decks we get in that make it to our finished page. If you're looking for a reel to reel deck to "actually use" then here you go. Only about 25% of the used Reel decks out there can be "practically" restored to working order. This one made it through. Playback & transport functions test great and records well! 8-Track, built-in amp and speakers all work great as well. Looks and sounds great too!
Another note I'd like to make is that the 8-Track is probably the BEST I've ever auditioned (and we've done A LOT of 8-Track decks, and I used to sell them when NEW).

AKAI X-1800SD Features include:


- 4-Speed
* Reel to Reel, 8-Track Cartridge deck w/ built-in speakers and amp
- DURABLE AC powered capstan motor (While "AC" Capstan motors generally have a bit more 'mechanical noise' that is typically noticeable in quieter environments, they are known for lasting decades longer than the DC capstan motors of the 'later' models)
- Up to 7" reel capacity (while you could go down as far as 3" in diameter, the torque and braking on this deck has been optimized for 7"reels)
- Akai's "Cross-Field" Bias Head, gets the tape 'bias signal' off of the 'Record' head (so the 'Record Head' can be concentrated only on recording the 'music' signal) and biases with a separate head
- One-Micron Gap Recording Head (reel)
- Stereo or MONO playback / recording (reel tape) (means that in "MONO" mode, you can record 4 separate passes on a tape or playback tapes made on older decks that did 'four separate tracks')
- Quad speeds at 7.5 ips / 19cms (with included speed sleeve adapter), 3 3/4ips / 9.5 cms,1 7/8 ips / 4.8 cms &
*15 ips / 38cms (requires optional 15ips kit, not available from us.
- As it's got its own, Built-in Power amp and speakers, it can be used as a 'stand alone' unit. (very handy for a media transfer business setting up another 'station' without a stereo / audio system)
- Stereo playback / recording 8-Track Cartridge tape
- Continuous Play or 'End of Tape' Stop for 8-Track (however at this point the 'Auto-Stop' does not seem to recognize the 'sensor' tape on 8-tracks so only does "Continuous Play" at the end of track #4)
- 8-Track 'Track Selector' w/ typical indicator lights
- Auto-Off for Reel deck
- Can also transfer from Reel tape to 8-Track Cartridge tape
*
- Built-in 'Tape Cleaner' pad (can also lube 'back coated' tapes so they don't squeak if you can obtain the correct silicone lube. No, we don't know where to get it at this point...yet)
- Dual front mounted 1/4" Microphone inputs
- Side mounted 1/4" Headphone jack
- RCA and DIN I/O's
- Separate L&R Input / Volume controls
- Separate L&R Tone controls (for built-in amp)
- Internal Speaker On/Off switch (Auto switches when using 'External' speakers)

- NOT an OFFICIAL feature, BUT one function this deck will allow is a sort of CUE by slightly pushing up on the 'pause' lever, while the deck is in play, you can get a 'variable speed' CUE function. You'll either need to very gradually release the pressure or with your other hand move the 'Play' lever to 'Stop' when you reach the spot you wanted to 'cue to' or the tape will track off the front edge of the pinch roller. Takes a bit of practice to get it right.

(
*15 ips ONLY w/ optional speed sleeve / pinch roller kit (not typically avail. The 15ips was utilized for transferring Reel tape signals to the 8-Track tape. While the Reel deck could record at 15ips, there's not a 15ips Tape EQ setting, which may or may not be detrimental to your needs)
-True "WORLD AC POWER" allows unit to be operated on 50 or 60 Hz AC and will select voltages from 110v, 120v, 220v and 240 volts AC input.

AKAI X-1800SD Specifications as follows:
 

Heads / Track system: Reel Heads; 4-track 2-channel / Stereo or 1-Channel / Mono heads for stereo or mono, Erase, Recording / Playback & Cross-Field Bias head
Heads / Track system: 8-Track Cartridge; 2-track 2-channel / Stereo  Erase, Recording / Playback
Motor: Two Speed, Induction Motor (drives Reel and Cartridge capstan)
Transport Control Type: Direct linked Mechanical
Maximum Reel capacity: 7" (5" and 3" as well) (brakes and motor torque optimized for 7" reels)
Tape speeds: 1 7/8 ips, 3.75 ips, 7-1/2 ips) and 15 ips w/ optional kit
Tape speed Deviation:
3.0% (ie: 1kHz may = 970Hz-1030Hz)
Fast Wind speed:
~120 secs for 1200 feet (7" reel)
Wow & Flutter: Reel; <0.18% RMS @ 7.5 ips
THD: Reel; <2% @ Line Level out
Frequency response: Reel; 30Hz to 23,000Hz (3dB @ 7-1/2 ips)
 &
30Hz to 18,000 Hz @ 3-3/4 ips
 &
30Hz to 9,000 Hz @ 1 7/8 ips
Cartridge; 50Hz to 15,000Hz (3dB @  3-3/4 ips
Signal to Noise Ratio: > 50dB on R2R and >45dB on Cartridge
Erase Ratio: Reel; >-70 for all tracks Cartridge; >-65dB
Crosstalk rejection: Reel; >-65dB in Mono and >-43dB in Stereo
Cartridge; >-50dB in Stereo
Input Level (Line): 60mV - 2.5V @ 150k Ohms
Input Level (Mic): 0.5mV - 20mV @ 30k Ohms
Output Level (Line): 1.228V (0VU) @ 250Hz from recorded tape signal
Bias Frequency: 60kHz
Built-In Power Amp Output: 12 W (6W/Ch) via discrete output transistors
Built-In Speakers: Dual 4", Full-Range

This is only the second AKAI X-1800SD we restored in ~24 years. Great machine for playback / archiving your tapes to CD or Hard Drive or for recording new tapes. This is a beautiful deck. Performs incredibly well following extensive refurbishing. The wood case is in great 'structural' condition. It exhibits the typical and expected finish fading / checking / dings. The decks face, knobs, covers and all cosmetics are fabulous!

This machines 'Forte' would be best suited for a 'media transfer' business, especially where you have a bench / station that doesn't have dedicated sound system (as it's go it's own, built-in amp and speakers) or for someone who has a lot of tapes to preview prior to sending for transfer, or for a library or university with a lot of tapes of different speeds / and track formats to transfer. If you're going to be listening to 'quiet, chamber' music while reading, the "AC powered" motor / fan noise could be noticable while 'casually' listening to quiet passages of music. If you tend to like the volume at more than 'low, back ground' levels, then you'll not likely notice "AC powered motor" hum. There is a bit of "60 cycle" hum on the outputs (typical again, of earlier, AC motored decks) that will be noticeable if you have the decks outputs above about "3:00 O'clock" / 75% of the way up, your pre-amp is above 11:00 O'clock (almost 'half way') up and the deck is in 'Pause' or playing a very quiet passage of music. Probably won't be noticed in most playing situations. If you're utilizing if for 'media transfers', you can simply turn on a 60 Hz filter in the software to remove / reduce it. If you have a graphic EQ, you can do the same, again, if you have the deck and your volume both turned very high.

Measures 13.5" wide x 15" tall x 9.5" deep and weighs 38 lbs unpacked. Includes a set of 'fresh' spindle stoppers / reel clamps. Comes with a pdf 'e' copy of Akai X-1800SD owners manual and original brochure. Can include the AKAI X-1800SD Service Manual pdf 'e' download if you wish as well. Includes our standard 90 day limited warranty.

 (Reels & tape shown in photos not included. All are sometimes available separately depending on stock levels.) 

 AKAI X-1800SD REEL TO REEL TAPE DECK
Cond. 8.5

SOLD 5/26/20
SHIPPED TO BOB IN COLORADO


(Reels shown in photos are not included, but we sometimes / occasionally have them for sale. Inquire at time of order.
However, all of our decks will come with 2x tapes for testing 'Playback' and 'Recording' as well as a 7" 'take-up' reel, and RCA patch cables for connection to your system)

 
 (Above text property of www.oaktreevintage.com / Oak Tree Enterprises, LLC. See 'Copyright Information' page for details)

 

 

 

 

       

        NEW LISTING 1/7/20
 
(Click on above thumbnails to enlarge photos)
CheckMarkSmall_web.jpg (792 bytes)  warranty

RESTORED / REFURBISHED / FULLY SERVICED
SONY / SUPERSCOPE "TAPECORDER"
SONY TC-105
3-SPEED
, MONO 4-TRACK / 1 CHANNEL
REEL TO REEL R2R
1/4" TAPE DECK

2" - 7" REEL CAPACITY
W/ BUILT IN AMP & SPEAKER
"Great for listening and / or transferring 'early / older recordings' to computer / CD etc."
#...
0880
Circa 1970-77
MIJ

SOLD 6/2/2020
SHIPPED TO BARRY IN MARYLAND


 Our technician has completely gone through and 'Certified' this unit.

 Importantly ENTIRE internal transport COMPLETELY disassembled, cleaned of old grease & re-lubed.

 Both Main Drive belt and Counter belt have been reconditioned for trouble-free service.

 Rubber pinch roller has been reconditioned, as well as all internal drive tires / wheels for positive grip.

 We also burnished the capstan

 heads have been cleaned and de-magnetized as well as the entire transport.

 Always at issue on these machines is the Pinch Roller swing arm assembly that has been completely disassembled, cleaned and re-lubed.

 Also hub brakes have been cleaned, re-lubed, and adjusted on fast wind modes also.

 Following above adjustments, Reel Start and Stop tested at beginning, middle and end of 'loaded' 7" tapes.

 Motor has been re-lubed as well.

 All internal pots and controls cleaned and tested for noise-free function.

 Both spindles in perfect alignment.

 Following initial refurb, we found tracks 1-4 to be diminished in high frequency response relative to tracks 2-3. We decided it could only be attributed to excessive wear to the Play / Rec head. After inspecting a number of replacement heads, we found one from a TC-200 (same head part number, and is the same head used in most of the Sony decks from that period) and installed it. Following that, we were able to bring the top end of 1-4 to within about 4dB of 2-3

 Head alignment / azimuth has been checked for peak performance.

 "Playback is now strong (following 'head-ectomy' with good 'top end' response.

 Heads now in good shape as well, with plenty of performance left in them.

 Plays perfectly on all tracks.

 Speed checked to 99.4% accuracy  (meaning that our 'verified' 1000Hz test tape now plays back at 994Hz).

(Total time investment in refurb / testing ~ 24 hours {yes, WAY TOO many hours on about any deck, but that's how it goes sometimes}). This unit was very clean and well cared for when we started on it.

Cosmetically in very clean condition! 
 
 ____________________________

Very simple Sony Reel to Reel Play / Record tape deck. Nothing fancy. While it will play both channels of a stereo tape, the signal out is blended. The deck can be a "stand alone" unit  as it has a built in amplifier and speaker, or can be connected to a CD burner / sound system. It is designed to be used horizontally. Great "industrial / school / institutional series deck. Perfect for those early / old reel tapes that were recorded in mono or the tapes recorded utilizing all 4 separate tracks to conserve tape.
New Info / Notes: While the manual doesn't mention it, we have played 'mono / 2 sided' tapes back on these machines. As the deck only plays 'half' of the sides material at once, your S/N ratio would not be as good (meaning you might have a bit of extra 'hiss' with the sound), but we tested with some old recordings and were not able to hear much of a difference / issue (while playing 'mono / half track' tapes, you monitor the 'forward' playing track by manipulating the 'Exchange' switch. You will either hear the 'intended' track playing forward, or the other side playing backward. Simply turn the tape over to hear the 'B' side going the correct direction.
As far as playing 'stereo' or more modern (post about '67 or so) tapes, that were recorded on a 4-track / 2-channel deck, playback results will depend on how the tape was recorded. If it was recorded in 'stereo' with a 'hard left and right' pan, you may only get part of the recording at a time; ie; mostly vocals by themselves or mostly instruments by themselves, as in the case of some Beatles recordings or some Canned Heat recordings. If the music was recorded panned more to the center or more 'mono', then it will likely be sufficient.


Sony TC-105 Features include:

- Triple tape speeds at 7.5 ips / 19cms, 3 3/4ips / 9.5 cms and 1 7/8 ips / 4.8 cms
- DURABLE AC powered capstan motor (lasts decades longer than DC capstan motors of the 'later' models)

   - Mono Playback & recording
- Individual track recording / playback capability
- Built-In mono amplifier and speaker
- Auto and Manual record level controls
- Tone control for built-in amp / speakers
- Side mounted 1/8" jacks for Headphone / Monitor, Microphone, Aux In and Ext Speaker.
- "Monitor" jack can be also used for connection to a CD burner / sound system
- Will play 2", 3", 5" & 7" reels.
- Solid State electronics.

Original SONY TC-105 Specifications as follows:

Power Requirements: 45 watts, АС 117 V / 60 Hz
Tape Speed: 7.5 ips / 19cms, 3 3/4ips / 9.5 cms and extra long 1 7/8 ips / 4.75 cms
Reels: 1/4" tape on 7 inches оr smaller
Recording Format: 4-track / Single-Channel monophonic
Frequency Response:

40-18,000 Hz @ 7 1/2ips.
40-13,000 Hz @ 3 3/4 ips.
50-6,000 Hz @ 1 7/8 ips.

Frequency Response w/ Standard Tape:

20-25,000 Hz @ 7 1/2ips
20-17,000 Hz @ 3 3/4 ips.
30- 9,000 Hz @ 1 7/8 ips.
Flutter and Wow: < 0.12% @ 7 1/2 ips.
                           
< 0.15% @ 3 3/4 ips.
                         
< 0.2% @ 1 7/8 ips.
Level Indication: Analog VU Meter
Recording Time: With 1,800' tape
(4-track mono)
@ 7 1/2 ips 45 min per track or 3 hrs total
@ 3.75ips 1.5 hrs per track or  /  6 hours total
@ 1 7/8 ips. 3 hr. / track or 12 hrs total
Inputs / Jacks / Connectors:
1/8" Microphone Input Jack w/  for Low Imp mic (600 Ohms) -77dB (0.11 mV)
1/8" Auxiliary Jack for 'High Imp' mic (100k Ohms) -27dB (34 mV)
1/8" Speaker Output Jack. 8 Ohms, 11.2dB (2.83V Max)
1/8" Monitor / Earphone / Headphone Jack 10k Ohms, 13 dB (3.46V Max)
Speaker size: 4" x 6"
Built-in amp power: 4 Watts


As stated earlier we have completely gone through it cleaning, lubing, adjusting, demagnetizing and testing everything. Plays well (very strong with great 'top end brilliance'), but as stated above, the recording on "1-4" is fairly diminished in signal.
Deck is designed to be used only lying on it's back (horizontally).  Measures 14" deep x 15" wide x 6" tall and weighs 21 lbs unpacked. Comes with original Sony lid. Includes e-copy / pdf download of the Sony TC-105 Owners / Users Manual, and the Sony TC-105 service manual if purchaser desires. Includes our standard 90 day limited warranty.
SONY TC-105
Condition 8.5

SOLD 6/2/2020
SHIPPING TO BARRY IN MARYLAND


(Reels & tape shown in photos not included. All are sometimes available separately depending on stock levels.) 


(Above text property of www.oaktreevintage.com / Oak Tree Enterprises, LLC. See 'Copyright Information' page for details)

 

 

        

            NEW LISTING 10/9/19
 
(Click on above thumbnails to enlarge photos)
CheckMarkSmall_web.jpg (792 bytes)  warranty

RESTORED / REFURBISHED / FULLY SERVICED
SONY TC-530 / TC530

 4-TRACK / 2-CHANNEL STEREO
 2-HEAD / 3-SPEED
 REEL TO REEL R2R
 3" - 7" REEL CAPACITY
 1/4" STEREO TAPE DECK
with Built-In AMP & SPEAKERS
MIJ

  "
WORLD AC POWER"
 Circa 196
7-69
SOLD 4/4/2020
SHIPPING TO MICHAEL IN NEW YORK


 Our technician has completely gone through and 'Certified' this unit.

Original tech notes on 'pre-inspection';
"Dirty, but relatively unmarked...take-up bushing loose in chassis...AC power cord frayed....Voltage incorrectly set to 110V...Playback head VERY worn...main drive tire dried & cracked and will need to be replaced...dents in pinch roller...FF & REW partially function. Entire transport needs total overhaul...motor is quiet...main drive belt stretched / cracked...Right channel very low output...speed; unable to determine as entire transport doesn't function well enough...VERY noisy controls...leaf switches intermittent to non-functional...Rec pressure pad too flat...very little high frequency likely due to excessive head wear."

 We have completely and extensively gone through the mechanicals and electronics of this unit.

 Entire transport was disassembled down to the chassis, and mechanical parts cleaned, re-lubed and reassembled.

 Flywheels removed, cleaned and reinstalled.

 Capstans burnished

 Again, the entire transport assembly was painstakingly disassembled, cleaned and re-lubed.

 'Auto-Stop' mechanism disassembled and re-lubed with fresh 300,000 silicon damping fluid.

 Also hub brakes have been cleaned, re-lubed, and adjusted on fast wind modes also.

 Main AC / Line / Power switch replaced with Original Sony from a donor unit

 Burnished leaf switches

 VU meter illumination lamps / bulbs check fine.

 Both spindles were completely disassembled, cleaned and had their bearings / bushings cleaned and re-lubed and are in perfect alignment and run 'true' (see above photos).

 Heights adjusted on both reel tables.

 Replaced dried / cracked idler tire with 'reconditioned' unit

 Main Drive and counter belts replaced for trouble-free service.

 Rubber pinch roller removed, cleaned & reconditioned, as well as all internal drive tires / wheels for positive grip.

 Combination Record / Playback head replaced with sourced OEM unit in good shape

 Tape heads and entire transport cleaned and demagnetized.

 Heads in great shape as well, and should have many hundreds of hours of performance left in them.

 All Amplifier controls and input selectors cleaned extensively

 AUX, Tuner and Phono inputs all tested fine on both channels following 'control cleaning'

 Amplifier tested on both channels (not a 'power house' of volume, but fine for 'lower volume' needs. Will get as loud as you need it to once connected to your system).

 Both speakers tested and frequency swept with no issues (internal and external, but again, won't get 'room filling' loud as they're simply to monitor playback).

 Speaker wires, amp input jacks and plugs all in perfect condition

 Head alignment / azimuth has been checked for peak performance on both play and record heads with factory STL 1k, 5k, 7.5k, 10k & 15k tones with oscilloscope.

 Records well, but much lower on VU than input (about -12-15 dB). Sonically fine. Biased for *Ampex GM 456 studio tape with the following results:
1kHz recorded @ 0dB resulted in PB @ -15dB (with minimal 'artifacts')

'Real World', DDD CD recorded at 0 = -12dB but sounded fine. This deck is a much better 'playback' unit than a 'record' unit.

* We also had great results with Maxell UD XL (Gold Box) tape as well
Note: If you're going to be making 'new' recordings, you'll want to 'push' the levels well into the "red" to get a good PB level.


 Floor noise measured at -60dBm w/ blank tape, L&R

 Both PB output levels and VU meters playback internally adjusted for even response.




We really put them through the paces, testing both with well mixed, recently recorded CD material and CD recorded / factory test tones looking for correct head Azimuth and speed accuracy).

Tape Speed tested to 100% accuracy on each speed independently, via cir bd micro-pots, utilizing 'factory' test tapes meaning that 1000 Hz tape plays back at 1000Hz +/-1Hz!

 External Cabinet and some of the speaker hardware replaced with Original Sony from a donor unit

Following electro/mechanical restoration, unit received a cosmetic cleaning / detailing.

(Total time investment in refurb / testing 29 hours).
Deck is now in overall, GREAT condition!!!
   ____________________________


 
Great condition & "Ready-to-go", Solid State, Sony TC-530 R2R with built in amp and speakers. Built-in amp and speakers make this a "stand alone" unit, yet can still be connected to your stereo system.  This is one of the few reel to reel decks we get in that make it to our finished page. Great performer. If you're looking for a reel to reel deck to "actually use" here you go. Only about 25 % of the used Reel decks out there can be "practically" restored to working order. This one made it through to test great! Looks and sounds great! We have completely gone through it. Will play 3", 5"and 7" reels.

Sony TC-530 Features include:
 

- Triple tape speeds at 7.5 ips / 19cms, 3 3/4ips / 9.5 cms and 1 7/8 ips / 4.8 cms
- Independent L & R recording switches. Allows twice the record time when mono sound is adequate.

- DURABLE AC powered capstan motor (lasts decades longer than DC capstan motors of the 'later' models)

- Independent L or R playback switches. Great for playing those early "single track" tapes recorded in mono (this function works when using the built-in amplifier and does not affect the stereo Line-Outputs
- Built-in stereo amp and dual speakers featuring 3" x 6", Sony built, full-range drivers as well as 4" full range drivers built into case front speaker cabinets that form the front cover. (again, really good for simply 'monitoring' what's on the tape)
- Speakers detach to form the front of the case
- Built-in 8' speaker cables with storage in speakers
- Dual front mounted " Microphone inputs
- Analog Tape Counter
- Lockable Pause control
- Variable Volume control for internal amplifier
- Separate Bass and Treble controls for built-in amplifier
- Balance control for internal amplifier
- Separate Left and Right Record level controls
- Dual Back-lit, analog VU level meters
 - 1/4" headphone jacks
- Top-mounted patch-bay loaded with I/O jacks including; Outputs are dual RCA line In / Outs, 1/4" speaker outputs
- Dual AC convenience outlets
- External AC fuse protection
-True "
WORLD AC POWER" allows unit to be operated on 50 or 60 Hz AC and will select voltages from 110v, 120v, 220v and 240 volts AC input.
 

 As stated earlier we have completely gone through it cleaning, re-lubing, adjusting, demagnetizing and testing everything. All rubber parts inspected, replaced and / or reconditioned. Records at approx -12-15dB and Plays well (and we really put them through the paces, testing both with well mixed CD material and CD test tones looking for correct head Azimuth and speed accuracy
(speed is correct to 100% @ 1kHz) and making test recordings. All fast wind and stop functions work perfectly at any point in the tape. Only two minor cosmetic issues; AC cord storage compartment door missing and head cover securing screws missing. Head cover still stays on well with friction. Pinch roller reconditioned and heads all in GREAT condition!!! Face and knobs all in great cosmetic condition as is the original case, hinges and latches. Both speakers detach from the top and form the top of the case when latched. Speaker cables store in lids. Since this unit has a built-in amplifier, pre-amp controls, multiple inputs and built-in speakers, it can be used as a true "stand-alone" unit. The internal amplifier and built-in speakers actually sound great as well! Very surprising. Of course unit will still patch into any stereo / sound system normally. Measures 15" tall x 20" wide x  x 10" deep (with speaker / covers installed) and weighs 40 lbs unpacked. Includes our standard 90 day limited warranty. Also includes a pair of rubber hub stoppers! (Reels & tape shown in photos not included. All are usually available separately if you need them)

SONY TC-530
Cond. 8.5

(CONS. R.R.)
SOLD 4/4/2020
SHIPPING TO MICHAEL IN NEW YORK


(Reels shown in photos are not included, but we sometimes / occasionally have them for sale. Inquire at time of order.
However, all of our decks will come with 2x tapes for testing 'Playback' and 'Recording' as well as a 7" 'take-up' reel, and RCA patch cables for connection to your system)

(Above text, in it's entirety, property of www.oaktreevintage.com / Oak Tree Enterprises, LLC. See 'Copyright Information' page for details)


(archived)
 


  

              

NEW LISTING 4/9/2020
(click on above thumbnails to enlarge photos)
CheckMarkSmall_web.jpg (792 bytes) warranty
RESTORED / REFURBISHED / FULLY SERVICED / WARRANTED
PIONEER OPEN REEL TO REEL TAPE RECORDER
 10.5" / 1/4" STEREO TAPE DECK
PIONEER RT-909 / RT909 REEL TAPE DECK
#...2720
 4-TRACK / 2-CHANNEL
  2-SPEED / 3 HEAD
AUTO-REVERSE
 5" / 7" / 10.5" (THE BIG ONES) REEL CAPACITY
  Circa 1979-84
MIJ

SOLD 4/14/20
SHIPPING TO BRAD IN HAWAII

  Our technician has completely gone through and 'Certified' this unit.   We have completely and extensively gone through the mechanicals and electronics of this unit.

  Entire transport was disassembled down to the chassis, and every mechanical part was cleaned, re-lubed and reassembled.

  Pinch-roller Lift Mechanism completely disassembled, cleaned and re-lubed (requires pulling head block, and Meter CB, once entire front face panel is removed and is fairly time consuming, but must be done on about 50% of 909's)

  PR mechanism solenoid mounts adjusted

  Capstans / flywheels removed, bushings and axels cleaned and re-lubed

  Capstans burnished

  Rubber pinch rollers have been replaced with FRESH units

  Brand new drive belt installed

  Heads have been cleaned and de-magnetized as well as the entire transport.

  Power supply CB adjusted to correct 15.1VDC which enables best performance from Cap motor, Playback and Record amp circuits

  Both L&R Tape Tension arm mechanisms removed, completely disassembled and re-lubed with 500,000 grade silicone gel (time consuming process and must be done to about 75+% of 909's)

  Back tension adjusted on both reel motors.

  All three motors test perfectly. Following above adjustments, Reel Start and Stop tested at beginning, middle and end of 7" and 10.5" tapes

  Brakes adjusted on fast wind modes on both 7.5 and fully loaded 10.5 reels from top speed.

  Internal pots, switches and controls cleaned and tested for noise-free function.

  We adjusted the 'Blue Fluorescent' VU meters electronically w/ factory test tone tapes, as well as the internal playback levels for both directions independently and record levels.

  Deck has been fully calibrated to factory manual specs, tested, and found to perform like new in all categories.

  Both spindles in perfect alignment.

  We also adjusted the reel table heights.

  Heads have virtually no appreciable, visible wear. (heads also HAVE NONE of the common 'green, surface corrosion' that a lot of Pioneer tape decks seem to get {we've had loads with the corrosion, and haven't really found a good way to remove it when a deck has it short of 'lapping' them...which we don't do})    

  BOTH direction Playback and Record Head alignment / azimuth was adjusted for peak performance with factory test tone tape and oscilloscope.

  Both internal speed pots adjusted to 100% accuracy on 3.75ips and 7.5ips speeds  independently (with pitch control zero'd) (meaning that our 'verified' 1000Hz test tape now plays back at 1000Hz +/- 1Hz w/ pitch control at 12:00 position).

  Recording tests performed with Ampex GM456 tape. Heres how it tested with the following frequencies recorded at 0dB;
500Hz = +2dB, 1kHz= +2dB, 2.5kHz= +1dB, 5kHz= +1dB, 7.5kHz= 0dB, 10kHz= 0dB, 12.5kHz= 0dB, 15kHz= -1dB, 17.5kHz= -1dB, 20kHz= -1.5dB, 22.5kHz= -4dB, and 25kHz= -5.5dB. Pretty damn good numbers for a 40 year old classic!


  Floor noise measured at >-60dBm

  This Pioneer RT-909 functions, plays, and records perfectly (and we really put them through the paces, testing both with well mixed, recently recorded CD material and CD recorded / factory test tones looking for correct head Azimuth and speed accuracy).  (Total time investment in refurb / testing ~ 12+ hours).

  Face is made of beautiful brushed aluminum and is in great condition and has never been rack mounted. Deck looks and works great! 
____________________________
Looks GREAT & is "Ready-to-go"! The very sought after Pioneer RT-909 Stereo Reel to Reel tape deck. Will play / record stereo 1/4" tapes on reels 5, 7 & 10.5". This is one of the few reel to reel decks we get in that make it to our finished page. Great performer. This one made it through and all functions test great! If you're looking for a reel to reel deck to "actually use" here you go. Only about 25% of the used Reel decks out there can be "practically" restored to working order. Heads have no appreciable, visible wear, check the record test results above, evidence theyre sounding great! Recordings sound FANTASTIC on this unit now. Looks essentially NEW and sounds great too! This one has never been 'rack mounted' so no 'rack-rash' on the mounting ears. As touched on above, the heads are in beautiful condition, also with none of the common 'green corrosion'. The head cover and the reel tables are also free of the 'green corrosion' that is often seen growing on Pioneer RT's. Also, both the original plastic skids are intact and un-broken (afflicts about half the 901's and 909's out there (should typically be removed prior to shipping along with the reel spindles).
Again, we have completely gone through it. It has been in my personal office system here at OakTreeVintage for a few years, but I'm switching to a 'high speed' unit.

Pioneer RT-909 Features include:

- 4-Track / 2-Channel
- 5" / 7" / 10.5" Reel Capacity (compatible with standard / normal 4-Track / 2-Channel tape format)
- 3 Heads for instant monitoring of tape levels while recording
- Three Motors for trouble free performance (has a lot to do with it still being a viable piece of gear due to less rubber parts)
- Dual Flywheel, Closed Loop Tape Transport
- BLUE METERS! Dual "Blue", Fluorescent level meters with dimmer selector
- Variable pitch control (
+/- 6%)
- Auto-Reverse for Playback (when using tape with "auto-reverse" sensing foil) (Forward Recording, with forward & reverse playback)
- Dual speeds at 7.5 ips / 19cms and 3 3/4ips / 9.5 cms
- 'IC Logic' / Solenoid Drive Touch Transport control and 'Power Brake' tape handling
- Manual Reverse switches for changing direction with out flipping reels over 
- Spring loaded, Reel table locks (no need for rubber stoppers / clamps)
- Independent Tape 'Bias' and 'Equalization' settings
- Repeat function
- Separate & dual concentric mic and line level controls
- Source / Monitor selector (for instant monitoring of recording)
- Independent L & R record enable switches for doing "sound-on-sound"
- Pitch Control (Playback)
- Left & Right output level controls
- 4-Digit, "Blue", Fluorescent tape counter
- 'Timer' Play / Record function
- Dual front mounted 1/4" Microphone inputs
- Variable Output Level controls for each channel (one of the most important features on a deck in our opinion. Allows you to match volume level of other sources, allows adjustment for 'best' pre-amp input to avoid distortion, allows you to change the volume of the deck if you have it located remotely from the pre-amp / receiver as I do, and many other applications)
- Standard 19" rack mountable


Pioneer RT-909 Specifications:

Heads: 4 (record, erase, fwd-play, rev-play)
1 Hard 'Permalloy' Recording Head 
1 Ferrite Erase Head 
1 Hard 'Permalloy' forward Playback Head 
1 Hard 'Permalloy' reverse Playback Head

Motors: Capstan drive motor; 1 (FG servo DC motor)
Reel base drive motors; 2 (6-pole inner rotor special induction type)
Tape Speed:
19cm/s (7-1/2ips), 9.5cm/s (3-3/4ips) 0.5%
Wow and flutter:
< 0.04% WRMS (19cm/s)
< 0.08% WRMS (9.5cm/s)
Signal to noise ratio: >60dB
THD:
<1% @ 19cms
Frequency response:
@ 19cm/s  20Hz to 30,000Hz (20Hz to 28,000Hz 3dB)
@ 9.5cm/s  20Hz to 20,000Hz (20Hz to 18,000Hz 3dB)
Crosstalk:
>50dB
Channel separation:
>50dB
Erasing coefficient:
>60dB
Recording bias Frequency:
125kHz
Pitch-control:
+/- 6%
2 VU-meters:
dB (-30 to +8)
Input Sensitivity (Minimum / Maximum allowable level / impedance):
Mic x 2; 0.316mV /100mV /27kΩ, 1/4" / 6mm diam. jacks
(suitable microphone, 250Ω to 10kΩ)
Line; 50mV / 25V / 50kΩ
Output Level Reference / Maximum:
Line; 900mV / 50kΩ
Headphones; 50mV / 8Ω, 1/4" / 6mm diam. jack
Fast Wind Time w/ 720m Tape & 10.5" reel:
Less than 120 sec.


As stated earlier we have completely gone through it cleaning, lubing, adjusting, demagnetizing and testing everything. Plays and records perfectly, AGAIN, records at +1dB @ 1kHz! Both original feet / skids intact and perfect (these are commonly broken / missing)

Thick & solid brushed aluminum face plate in LIKE NEW condition and has never been 'racked' so no rack screw rack rash / marks!    

 About the only cosmetic issue worth mentioning is someone engraved their id number in the rear panel.
 
Overall, the sheet metal case is
in excellent condition.

These are great machines. I have had this one myself for years. It's a blast to put on a BIG 10.5" reel with Pink Floyds, "Dark Side of the Moon". Even though it was designed for the consumer market, many were and are in use in schools, universities, libraries, clubs, etc. I worked at a Sheraton Inn in the late 70's and early 80's, and we had two in the DJ booth, that supplied foreground music from about 11AM till the DJ showed up at about 9PM, 7 days a week!
Comes with an original (not it's) Pioneer RT-909 box and packing.
Also includes a pair of original, Pioneer PP-220 NAB Hub adaptors.

 

Also includes a 'non-Pioneer', Metal (Scotch brand with some surface wear), 10.5" take-up reel, as well as our normal accessory kit that includes a 'PlayBack Demo' made on the deck, a 7" plastic take-up reel, and a couple of other assorted 7" tapes to play with.
Includes a pdf / 'e-copy' download of the Pioneer RT-909 Owners manual, and if desired, a copy of the Pioneer RT-909 Service manual. Measures 19" wide x 11.5" deep x 13.5" high and weighs 46 lbs unpacked. Includes our standard 90 day limited warranty.

PIONEER RT-909 Reel to Reel Tape Deck
Cond. 9

SOLD 4/14/20
SHIPPING TO BRAD IN HAWAII


WITH A PAIR OF ORIGINAL PIONEER NAB HUBS AND A 10.5" METAL SCOTCH TAKE-UP REEL!!!

(Reels shown in photos are not included, but we sometimes / occasionally have them for sale. Inquire at time of order.
However, all of our decks will come with 2x tapes for testing 'Playback' and 'Recording' as well as a 7" 'take-up' reel, and RCA patch cables for connection to your system)

 
 (Above text property of www.oaktreevintage.com / Oak Tree Enterprises, LLC. See 'Copyright Information' page for details)

(archived)

 

 
 

    

    

     NEW LISTING 2/28/20
(Click on above thumbnails to enlarge photos)
CheckMarkSmall_web.jpg (792 bytes)  warranty
RESTORED / REFURBISHED / FULLY SERVICED
VINTAGE AKAI REEL TO REEL TAPE DECK
AKAI X-1810

COMBO REEL-REEL / 8-TRACK CARTRIDGE
4-TRACK / 2-CHANNEL STEREO or 4-TRACK / 1-CHANNEL MONO 
AKAI's "CROSS-FIELD
" BIAS HEAD
3-MOTOR / 3-SPEEDS
AUTO-REVERSE
1/4" REEL TO REEL

BUILT-IN STEREO AMP AND SPEAKERS

#...
1252
MIJ

  
"
WORLD AC POWER"
Circa 1973-74

SOLD 4/14/20
SHIPPING TO DON IN TEXAS


 Our technician has completely gone through and 'Certified' this unit.

 
We have completely and extensively gone through the mechanicals and electronics of this unit.

 Entire transport was cleaned, de-greased, and re-lubed including; Pinch Roller Pivot Arm, EOT Sensor Arm, Left Tape Tension arm mechanism, Capstan Motor (clean and re-lube), Capstan and flywheel shaft removed cleaned / re-lubed (pretty much every moving part)

 Transport cams checked for usable condition prior to any work starting (here in the West, we have less of an issue with the typical deterioration that you see in more 'humid' climates such as the Mid-West, South and Coasts (be very careful getting an Akai from the early to mid 1970's that has spent most of it's life in a 'humid' environment).

 Entire 8-Track transport assembly was removed and disassembled for service, including burnishing it's connector, and track elevator / selector contacts.



 Voltage re-set to correct 120VAC

 Circuit board edge card PCB contacts and connectors cleaned w/ solvent and burnished w/ fiberglass pen



 Replaced 'commonly black-legged', Hitachi C458 transistor as well as 'proactively' the other 3 transistors on Auto-Reverse control PCB

 Tape Tension arms cleaned and re-lubed, and their springs adjusted

 Bent Right reel spindle straightened

 Reel table height correct

 pinch-roller 'arm' mechanism completely disassembled, cleaned and re-lubed

 Capstan / flywheel removed, bushings and axles cleaned and re-lubed and flywheel burnished

 Capstan motor pulley burnished

 Capstan cleaned

 Rubber pinch roller removed and re-conditioned

 New MAIN drive belt, #42-550 installed

 Brand new counter belt, #042 installed

 Heads have been cleaned and de-magnetized as well as the entire transport (reel and 8-Track Cartridge).

 Brakes adjusted on fast wind modes at ALL points thru a tape. It's a fine line between having the brakes actuate with too much tension, 'abruptly' stopping the tape (risking stretching / breaking of tape) or too loose (allows tape to 'dump'). (VERY difficult to do on this series). Brakes optimized for 7" reels.

 Motor torque test perfectly. Following above adjustments, Reel Start and Stop tested at beginning, middle and end of 7" reels.

 Internal pots, switches (including linear record switch and 'rotary wafer' switches) and controls cleaned and tested for noise-free function (initially, of course, had typical static / noise which is to be expected in an 'un-serviced' deck after 45+ years) (also a bit easier on this "1810 than the "A-Type and B-Type X-1800SD" version. Just FYI).

 External / User adjustable pots, switches and controls cleaned on the playback / record amp and tested for noise-free function (tech notes; Line out set to 0dB using 0dB reference @ 400Hz. Vol controls @ approx 1:30)

 Replaced VU meter lamps / bulbs #25-080

 We adjusted the VU meters mechanically and electronically w/ factory test tone tapes, as well as the internal playback levels for both directions independently and record levels.

 We adjusted the output, 'Minimum Input', 'Specified Input', 'Record Level' and deck records well on Ampex 456.

 Both spindles in good alignment.

 Repaired broken internal connection lead wire for cap motor

 Heads in great shape as well, with many years of performance left in them

 Alignment / azimuth was adjusted for peak performance on Playback and Record Heads on both the R2R and the 8-Track with factory test tone tape and oscilloscope.

 "X-Field / Bias" head had it's clearance checked / adjusted w / feeler gauges.

 Repaired both 'Manual' Auto-Reverse switches

 Following initial restoration tests, we found we would have a channel drop out after playing for a while or when changing directions, and traced it to contact issues in the relays, thus the following operation...

 Both Play and Record relays (RL0201 & RL0202) had their contacts burnished on the 'Direction Change' PCB (not an easy task. Then tested 4 Hours with multiple manual reverses)

 Speed tested to 99.3% accuracy following refurb (meaning that our 'verified' 1000Hz test tape now plays back at 1007Hz +/- 2Hz. (within spec).
 
 Adjusted to record sonically well* with the following results w/ Input at ~ 9:00 when recording, then Output control re-set to ~"2:00 PM" for playback.

 'Real World, DDD CD recorded sounds great w/ more *quality tapes such as Maxell UD-35, TDK Audua, or Ampex GM456 rather than say Scotch 150 or Sony 150 etc.


 'Electronic' Floor noise measured at >-60dB w/ blank tape, L&R.

 Depending on the impedance of any headphones utilized with the unit, the volume can be lower they would be expected thru the headphone output.

 Motor was disassembled, had front and rear bushings cleaned and re-lubed w/ 30W. VERY quiet now.

 This AKAI X-1810 now functions, plays, and records WELL (and we really put them through the paces, testing both with well mixed, recently recorded CD material and CD recorded / factory test tones looking for correct head Azimuth and speed accuracy).  (Total time investment in refurb process / and final testing ~ 44 hours...DOUBLE OUCH!!!).

The AKAI X-1810 Stereo Reel to Reel tape deck. Ready to GO! This is one of the few reel to reel decks we get in that make it to our finished page. Great performer. If you're looking for a reel to reel deck to "actually use" here you go. Only about 25% of the used Reel decks out there can be "practically" restored to working order. This one made it through with flying colors after about 44 hours of bench time.

Following mechanical / electronic refurb, entire unit was cosmetically detailed inside and out. Face is made of flat-black finished, aluminum and is dent free and in great condition. Only minor cosmetic issues to mention, all to do with finish / Formica chips to the case edge (see photos above). Deck looks and sounds great! 
   ____________________________
   
Looks great & "Ready-to-go"  AKAI X-1810 Stereo Reel to Reel tape deck. Very 'famous' and popular reel tape deck. Probably half the folks stationed overseas in the military during Viet Nam that purchased a Reel to Reel came back with an 1800 series. Unfortunately of course, 45 years has not been kind to Akai Reel decks (or any electro-mechanical devices that are 20 years old or older). The internal lubes were never meant to last that long, certainly without maintenance, and 'rubber' doesn't 'age well' either, thus requiring the above stated work. There's also the Akai Transport cams that need to be inspected for their degree of condition and replaced if necessary (difficult and potentially expensive). We've already inspected them for any detrimental issues. Ready to go now. Will play & Record stereo 1/4" tapes on reels up to 7". This is one of the few reel to reel decks we get in that make it to our finished page. If you're looking for a reel to reel deck to "actually use" then here you go. Only about 25% of the used Reel decks out there can be "practically" restored to working order. This one made it through. Playback & transport functions test great and records well! 8-Track, built-in amp and speakers all work great as well. Looks and sounds great too!

AKAI X-1810 Features include:


- 3 Motor design
(means less 'Rube Goldberg' mechanisms inside like many R2R's)
- DURABLE AC powered capstan motor (lasts decades longer than DC capstan motors of the 'later' models)
- 4-Speed
* Reel to Reel, 8-Track Cartridge deck w/ built-in speakers and amp
- Up to 7" reel capacity (while you could go down as far as 3" in diameter, the torque and braking on this deck has been optimized for 7"reels)
- Akai's "Cross-Field" Bias Head, gets the tape 'bias signal' off of the 'Record' head (so the 'Record Head' can be concentrated only on recording the 'music' signal) and biases with a separate head
- One-Micron Gap Recording Head (reel)

- Stereo or MONO playback / recording (reel tape) (means that in "MONO" mode, you can record 4 separate passes on a tape or playback tapes made on older decks that did 'four separate tracks')

- Quad speeds at
7.5 ips / 19cms (with included speed sleeve adapter), 3 3/4ips / 9.5 cms,1 7/8 ips / 4.8 cms & *15 ips / 38cms
- As it's got its own, Built-in Power amp and speakers, it can be used as a 'stand alone' unit. (very handy for a media transfer business setting up another 'station' without a stereo / audio system)

-
Spring loaded, Reel locks / Spindle tips (does not require rubber reel clamps / stoppers)
- Stereo playback / recording 8-Track Cartridge tape
- Auto-Reverse capable with 'sensing foil' installed (on correct side of tape)
- 'Manual-Reverse' at anytime with L & R selectors

- 'Continuous Play' or 'End of Tape Stop' for 8-Track
- S.R.T. Super Range Tape Equalization setting for recording
- Auto-Off for Reel deck
- Dual Analog VU meters
- Can also transfer from Reel tape to 8-Track Cartridge tape
*

- 8-Track 'Track Selector' w/ typical indicator lights
- Dual front mounted 1/4" Microphone inputs
- Front mounted 1/4" Headphone jack
- RCA and DIN I/O's
- Separate L&R Input / Volume controls
- Separate L&R Tone controls (for built-in amp)

- Internal Speaker On/Off switch (Auto switches when using 'External' speakers)


- NOT an OFFICIAL feature, BUT one function this deck will allow is a sort of CUE by slightly pushing up on the 'pause' lever, while the deck is in play, you can get a 'variable speed' CUE function. You'll either need to very gradually release the pressure or with your other hand move the 'Play' lever to 'Stop' when you reach the spot you wanted to 'cue to' or the tape will track off the front edge of the pinch roller. Takes a bit of practice to get it right.

- ANOTHER 'UN-OFFICIAL' feature of this deck is that due to it's internal 'brake' design, it's possible to 'SCRATCH' the tape across the playback head forward or backward! Just like with a DJ turntable!


(*15 ips ONLY w/ optional speed sleeve / pinch roller kit (not typically avail. The 15ips was utilized for transferring Reel tape signals to the 8-Track tape. While the Reel deck could record at 15ips, there's not a 15ips Tape EQ setting, which may or may not be detrimental to your needs)

-True "WORLD AC POWER" allows unit to be operated on 50 or 60 Hz AC and will select voltages from 110v, 120v, 220v and 240 volts AC input.


AKAI X-1810 Original Specifications:

 

Heads / Track system: Reel Heads; 4-track 2-channel / Stereo or 1-Channel / Mono heads for stereo or mono, Erase, Recording / Playback & Cross-Field Bias head
Heads / Track system: 8-Track Cartridge; 2-track 2-channel / Stereo  Erase, Recording / Playback
Motors: 3x, One 'Hysteresis Synchronous 3-Speed capstan motor and 2x 6-Pole, Eddy-Current, Outer-rotor motors for supply and take-up reels.
Transport Control Type: Direct linked Mechanical and electronic
Maximum Reel capacity: 7" (5" and 3" as well) (brakes and motor torque optimized for 7" reels)
Tape speeds: 1 7/8 ips, 3.75 ips, 7-1/2 ips) and 15 ips w/ optional kit
Tape speed Deviation:
0.8%
Fast Wind speed:
~60-75 secs for 1200 feet (7" reel)
Wow & Flutter: Reel; >0.08% RMS @ 7.5 ips
THD: Reel; <2% @ 1kHz w/
Line Level out @ 0dB
Frequency response: Reel; 30Hz to 22,000Hz (3dB @ 7-1/2 ips)
 &
30Hz to 18,000 Hz @ 3-3/4 ips
 &
30Hz to 9,000 Hz @ 1 7/8 ips
Cartridge; 50Hz to 16,000Hz (+/-3dB @  3-3/4 ips
Signal to Noise Ratio: > 50dB on R2R and >45dB on Cartridge
Erase Ratio: Reel; >-70 for all tracks &
Cartridge; >-65dB
Crosstalk rejection:
Reel; >-70dB in Mono and >-43dB in Stereo
Cartridge; >-50dB in Stereo
Input
Level (Line): 60mV - 2.5V
@ 150k Ohms
Input Level (Mic): 0.5mV - 20mV @ 30k Ohms
Output Level (Line): 1.23V
(0VU) @ 250Hz from recorded tape signal
Bias Frequency: 65kHz


This is only about the third AKAI X-1810 we have restored in ~24 years. Great machine for playback / archiving your tapes to CD or Hard Drive or for recording new tapes. This is a clean deck. Performs very well following extensive refurbishing.
The vinyl wrapped, wood-grained case is in great 'structural' and decent cosmetic condition with only the above mentioned finish chips. The decks face, knobs, covers and all cosmetics are fabulous!
This machine would really be great for a 'media transfer' business or for someone who has a lot of tapes to preview prior to sending for transfer, or for a library or university with a lot of tapes of different speeds / and track formats to transfer. Of course it would also be great for anyone wanting to add an 'all purpose' reel to reel to their system. If your interest is primarily to 'record 8-tracks', I would simply choose a much simpler, '8-track only' deck that records better and would be less money.
Measures 17.5" wide x 18" tall x 9.8" deep and weighs 47 lbs unpacked. Comes with a pdf 'e' copy of Akai X-1810 / X-1810 owners manual and original brochure. Can include the AKAI X-1810 / X-1810 Service Manual pdf 'e' download if you wish as well. Includes our standard 90 day limited warranty.

 (Reels & tape shown in photos not included. All are sometimes available separately depending on stock levels.) 

 AKAI X-1810 REEL TO REEL TAPE DECK

Cond. 8.5

SOLD 4/14/20
SHIPPING TO DON IN TEXAS


(Reels shown in photos are not included, but we sometimes / occasionally have them for sale. Inquire at time of order.
However, all of our decks will come with 2x tapes for testing 'Playback' and 'Recording' as well as a 7" 'take-up' reel, and RCA patch cables for connection to your system)


 
 (Above text property of www.oaktreevintage.com / Oak Tree Enterprises, LLC. See 'Copyright Information' page for details)

(archived)
 

 
         

            NEW LISTING 2/2/20
(Click on above thumbnails to enlarge photos)
CheckMarkSmall_web.jpg (792 bytes)  warranty
RESTORED / REFURBISHED / FULLY SERVICED
VINTAGE AKAI REEL TO REEL TAPE DECK
AKAI X-1810D

COMBO REEL-REEL / 8-TRACK CARTRIDGE
4-TRACK / 2-CHANNEL STEREO or 4-TRACK / 1-CHANNEL MONO 
AKAI's "CROSS-FIELD
" BIAS HEAD
3-MOTOR / 3-SPEEDS
AUTO-REVERSE
1/4" REEL TO REEL

#...
0334
MIJ

  
"
WORLD AC POWER"
Circa 1973-74
SOLD 3/26/20
SHIPPING TO MICHAEL IN WASHINGTON


 Our technician has completely gone through and 'Certified' this unit.

 
We have completely and extensively gone through the mechanicals and electronics of this unit.

 Entire transport was cleaned, de-greased, and re-lubed including; Pinch Roller Pivot Arm, EOT Sensor Arm, Left Tape Tension arm mechanism, Capstan Motor (clean and re-lube), Capstan and flywheel shaft removed cleaned / re-lubed (pretty much every moving part)

 Transport cams checked for usable condition prior to any work starting (here in the West, we have less of an issue with the typical deterioration that you see in more 'humid' climates such as the Mid-West, South and Coasts (be very careful getting an Akai from the early to mid 1970's that has spent most of it's life in a 'humid' environment).

 Entire 8-Track transport assembly was removed and disassembled for service, including burnishing it's connector, and track elevator / selector contacts.



 Voltage re-set to correct 120VAC

 Circuit board edge card contacts and connectors cleaned w/ solvent and burnished w/ fiberglass pen



 Tape Tension arms cleaned and re-lubed, and their springs adjusted

 Reel table height correct

 pinch-roller 'arm' mechanism completely disassembled, cleaned and re-lubed

 Capstan / flywheel removed, bushings and axles cleaned and re-lubed and flywheel burnished

 Capstan motor pulley burnished

 Capstan cleaned

 Rubber pinch roller removed and re-conditioned

 New MAIN drive belt, #42-550 installed

 Brand new counter belt, #042 installed

 Heads have been cleaned and de-magnetized as well as the entire transport (reel and 8-Track Cartridge).

 Brakes adjusted on fast wind modes at ALL points thru a tape. It's a fine line between having the brakes actuate with too much tension, 'abruptly' stopping the tape (risking stretching / breaking of tape) or too loose (allows tape to 'dump'). (VERY difficult to do on this series). Brakes optimized for 7" reels.

 Motor torque test perfectly. Following above adjustments, Reel Start and Stop tested at beginning, middle and end of 7" reels.

 Internal pots, switches (including linear record switch and 'rotary wafer' switches) and controls cleaned and tested for noise-free function (initially, of course, had typical static / noise which is to be expected in an 'un-serviced' deck after 45+ years) (also a bit easier on this "1810D than the "A-Type and B-Type X-1800SD" version. Just FYI).

 External / User adjustable pots, switches and controls cleaned on the playback / record amp and tested for noise-free function

(tech notes; Line out set to 0dB using 0dB reference @ 400Hz. Vol controls @ approx 1:30)

 Replaced VU meter lamps / bulbs #25-080

 We adjusted the VU meters mechanically and electronically w/ factory test tone tapes, as well as the internal playback levels for both directions independently and record levels.

 We adjusted the output, 'Minimum Input', 'Specified Input', 'Record Level' and 'Bias' all to spec, then further adjusted 'Bias' for Sony or Scotch "150", but Ampex 456 really shines.

 Both spindles in perfect alignment.

 Heads in great shape as well, with many years of performance left in them

 Alignment / azimuth was adjusted for peak performance on Playback and Record Heads on both the R2R and the 8-Track with factory test tone tape and oscilloscope.

 "X-Field / Bias" head had it's clearance checked / adjusted w / feeler gauges.

 Slightly noisy tape guide bearing replaced

 Repaired both 'Manual' Auto-Reverse switches

 Following initial restoration tests, we found we would have a channel drop out after playing for a while or when changing directions, and traced it to contact issues in the relays, thus the following operation...

 Both Play and Record relays (RL0201 & RL0202) had their contacts burnished on the 'Direction Change' PCB (not an easy task. Then tested 4 Hours with multiple manual reverses)

 Speed tested to 98.0% accuracy following refurb (meaning that our 'verified' 1000Hz test tape now plays back at 980Hz +/- 2Hz. (within spec).
 
 Adjusted to record sonically well* with the following results w/ Input at ~ 9:00 when recording, then Output control re-set to ~"2:00 PM" for playback.

 'Real World, DDD CD recorded sounds great w/ more *quality tapes such as Maxell UD-35, TDK Audua, or Ampex GM456 rather than say Scotch 150 or Sony 150 etc.


 'Electronic' Floor noise measured at >-52dB w/ blank tape, L&R.

 Depending on the impedance of any headphones utilized with the unit, the volume can be lower they would be expected thru the headphone output.

 Motor was disassembled, had front and rear bushings cleaned and re-lubed w/ 30W. VERY quiet now.

 This AKAI X-1810D functions, plays, and records VERY WELL (and we really put them through the paces, testing both with well mixed, recently recorded CD material and CD recorded / factory test tones looking for correct head Azimuth and speed accuracy).  (Total time investment in refurb process / and final testing ~ 26 hours).

The AKAI X-1810D Stereo Reel to Reel tape deck. Ready to GO! This is one of the few reel to reel decks we get in that make it to our finished page. Great performer. If you're looking for a reel to reel deck to "actually use" here you go. Only about 25% of the used Reel decks out there can be "practically" restored to working order. This one made it through with flying colors after about 26 hours of bench time.

Following mechanical / electronic refurb, entire unit was cosmetically detailed inside and out. Face is made of flat-black finished, aluminum and is dent free and in great condition. Really no cosmetic issues to mention. Deck looks and sounds great! 
   ____________________________
   
Looks great & "Ready-to-go"  AKAI X-1810D Stereo Reel to Reel tape deck. Very 'famous' and popular reel tape deck. Probably half the folks stationed overseas in the military during Viet Nam that purchased a Reel to Reel came back with an 1800 series. Unfortunately of course, 45 years has not been kind to Akai Reel decks (or any electro-mechanical devices that are 20 years old or older). The internal lubes were never meant to last that long, certainly without maintenance, and 'rubber' doesn't 'age well' either, thus requiring the above stated work. There's also the Akai Transport cams that need to be inspected for their degree of condition and replaced if necessary (difficult and potentially expensive). We've already inspected them for any detrimental issues. Ready to go now. Will play & Record stereo 1/4" tapes on reels up to 7". This is one of the few reel to reel decks we get in that make it to our finished page. If you're looking for a reel to reel deck to "actually use" then here you go. Only about 25% of the used Reel decks out there can be "practically" restored to working order. This one made it through. Playback & transport functions test great and records well! 8-Track, built-in amp and speakers all work great as well. Looks and sounds great too!
Another note I'd like to make is that the 8-Track is among BEST I've auditioned (
and we've restored and sold A LOT of 8-Track decks 'as vintage', and I sold them when NEW as well).

AKAI X-1810D Features include:


- 3 Motor design
(means less 'Rube Goldberg' mechanisms inside like many R2R's)
- DURABLE AC powered capstan motor (lasts decades longer than DC capstan motors of the 'later' models)
- 4-Speed
* Reel to Reel, 8-Track Cartridge deck w/ built-in speakers and amp
- Up to 7" reel capacity (while you could go down as far as 3" in diameter, the torque and braking on this deck has been optimized for 7"reels)
- Akai's "Cross-Field" Bias Head, gets the tape 'bias signal' off of the 'Record' head (so the 'Record Head' can be concentrated only on recording the 'music' signal) and biases with a separate head
- One-Micron Gap Recording Head (reel)

- Stereo or MONO playback / recording (reel tape) (means that in "MONO" mode, you can record 4 separate passes on a tape or playback tapes made on older decks that did 'four separate tracks')

- Quad speeds at
7.5 ips / 19cms (with included speed sleeve adapter), 3 3/4ips / 9.5 cms,1 7/8 ips / 4.8 cms & *15 ips / 38cms
-
Spring loaded, Reel locks / Spindle tips (does not require rubber reel clamps / stoppers)
- Stereo playback / recording 8-Track Cartridge tape
- Auto-Reverse capable with 'sensing foil' installed (on correct side of tape)
- 'Manual-Reverse' at anytime with L & R selectors

- 'Continuous Play' or 'End of Tape Stop' for 8-Track

- S.R.T. Super Range Tape Equalization setting for recording
- Auto-Off for Reel deck
- Dual Analog VU meters
- Can also transfer from Reel tape to 8-Track Cartridge tape
*

- 8-Track 'Track Selector' w/ typical indicator lights
- Dual front mounted 1/4" Microphone inputs
- Front mounted 1/4" Headphone jack
- RCA and DIN I/O's
- Separate L&R Input / Volume controls


- NOT an OFFICIAL feature, BUT one function this deck will allow is a sort of CUE by slightly pushing up on the 'pause' lever, while the deck is in play, you can get a 'variable speed' CUE function. You'll either need to very gradually release the pressure or with your other hand move the 'Play' lever to 'Stop' when you reach the spot you wanted to 'cue to' or the tape will track off the front edge of the pinch roller. Takes a bit of practice to get it right.

- ANOTHER 'UN-OFFICIAL' feature of this deck is that due to it's internal 'brake' design, it's possible to 'SCRATCH' the tape across the playback head forward or backward! Just like with a DJ turntable!


(*15 ips ONLY w/ optional speed sleeve / pinch roller kit (not typically avail. The 15ips was utilized for transferring Reel tape signals to the 8-Track tape. While the Reel deck could record at 15ips, there's not a 15ips Tape EQ setting, which may or may not be detrimental to your needs)

-True "WORLD AC POWER" allows unit to be operated on 50 or 60 Hz AC and will select voltages from 110v, 120v, 220v and 240 volts AC input.


AKAI X-1810D Original Specifications:

 

Heads / Track system: Reel Heads; 4-track 2-channel / Stereo or 1-Channel / Mono heads for stereo or mono, Erase, Recording / Playback & Cross-Field Bias head
Heads / Track system: 8-Track Cartridge; 2-track 2-channel / Stereo  Erase, Recording / Playback
Motors: 3x, One 'Hysteresis Synchronous 3-Speed capstan motor and 2x 6-Pole, Eddy-Current, Outer-rotor motors for supply and take-up reels.
Transport Control Type: Direct linked Mechanical and electronic
Maximum Reel capacity: 7" (5" and 3" as well) (brakes and motor torque optimized for 7" reels)
Tape speeds: 1 7/8 ips, 3.75 ips, 7-1/2 ips) and 15 ips w/ optional kit
Tape speed Deviation:
0.8%
Fast Wind speed:
~60-75 secs for 1200 feet (7" reel)
Wow & Flutter: Reel; >0.08% RMS @ 7.5 ips
THD: Reel; <2% @ 1kHz w/
Line Level out @ 0dB
Frequency response: Reel; 30Hz to 22,000Hz (3dB @ 7-1/2 ips)
 &
30Hz to 18,000 Hz @ 3-3/4 ips
 &
30Hz to 9,000 Hz @ 1 7/8 ips
Cartridge; 50Hz to 16,000Hz (+/-3dB @  3-3/4 ips
Signal to Noise Ratio: > 50dB on R2R and >45dB on Cartridge
Erase Ratio: Reel; >-70 for all tracks &
Cartridge; >-65dB
Crosstalk rejection:
Reel; >-70dB in Mono and >-43dB in Stereo
Cartridge; >-50dB in Stereo
Input
Level (Line): 60mV - 2.5V
@ 150k Ohms
Input Level (Mic): 0.5mV - 20mV @ 30k Ohms
Output Level (Line): 1.23V
(0VU) @ 250Hz from recorded tape signal
Bias Frequency: 65kHz


This is only the second AKAI X-1810 we have restored in ~24 years. Great machine for playback / archiving your tapes to CD or Hard Drive or for recording new tapes. This is a beautiful deck. Performs incredibly well following extensive refurbishing.
The vinyl wrapped, wood-grained case is in great 'structural' and cosmetic condition. The decks face, knobs, covers and all cosmetics are fabulous!
This machine would really be great for a 'media transfer' business or for someone who has a lot of tapes to preview prior to sending for transfer, or for a library or university with a lot of tapes of different speeds / and track formats to transfer. Of course it would also be great for anyone wanting to add an 'all purpose' reel to reel to their system. If your interest is primarily to 'record 8-tracks', I would simply choose a much simpler, '8-track only' deck that records better and would be less money.
Measures 17.5" wide x 18" tall x 9.8" deep and weighs 47 lbs unpacked. Comes with a pdf 'e' copy of Akai X-1810 / X-1810D owners manual and original brochure. Can include the AKAI X-1810 / X-1810D Service Manual pdf 'e' download if you wish as well. Includes our standard 90 day limited warranty.

 (Reels & tape shown in photos not included. All are sometimes available separately depending on stock levels.) 

 AKAI X-1810D REEL TO REEL TAPE DECK

Cond. 8.5++
(Cons. R.S.)
SOLD 3/26/20
SHIPPING TO MICHAEL IN WASHINGTON


(Reels shown in photos are not included, but we sometimes / occasionally have them for sale. Inquire at time of order.
However, all of our decks will come with 2x tapes for testing 'Playback' and 'Recording' as well as a 7" 'take-up' reel, and RCA patch cables for connection to your system)


 
 (Above text property of www.oaktreevintage.com / Oak Tree Enterprises, LLC. See 'Copyright Information' page for details)

(archived)

 

  

          

       NEW LISTING 12/12/19
(Click on above thumbnails to enlarge photos)
CheckMarkSmall_web.jpg (792 bytes)  warranty
RESTORED / REFURBISHED / FULLY SERVICED
VINTAGE AKAI REEL TO REEL TAPE DECK
AKAI X-1800SD (TYPE-C)

COMBO REEL / 8-TRACK CARTRIDGE
4-TRACK / 2-CHANNEL STEREO or 4-TRACK / 1-CHANNEL MONO 
AKAI's "CROSS-FIELD
" BIAS HEAD
4
*-SPEEDS
1/4" REEL TO REEL
BUILT-IN AMP AND SPEAKERS
#...3198
MIJ

  
"
WORLD AC POWER"
Circa 1970-72
SOLD 4/2/20
SHIPPING TO BOB IN FLORIDA


 Our technician has completely gone through and 'Certified' this unit.

 
We have completely and extensively gone through the mechanicals and electronics of this unit.

 Entire transport was disassembled down to the chassis, and every mechanical part was cleaned, de-greased, and re-lubed including; Pinch Roller Pivot Arm, EOT Sensor Arm, Left Tape Tension arm mechanism, Capstan Motor (clean and re-lube), Capstan and flywheel shaft removed cleaned / re-lubed (pretty much every moving part)

 Transport cams checked for usable condition prior to any work starting (here in the West, we have less of an issue with the typical deterioration that you see in more 'humid' climates such as the Mid-West, South and Coasts (be very careful getting an Akai from the early to mid 1970's that has spent most of it's life in a 'humid' environment).

 Entire 8-Track transport assembly was removed and disassembled for service, including burnishing it's connector, and track selector contacts.

 Voltage re-set to correct 120VAC

 Circuit board edge card contacts and connectors burnished w/ solvent and fiberglass pen

 Tape Tension arms disassembled, cleaned and re-lubed, and their springs adjusted

 Reel table height correct

 pinch-roller 'arm' mechanism completely disassembled, cleaned and re-lubed

 Capstan / flywheel removed, bushings and axles cleaned and re-lubed and flywheels burnished

 Capstan motor pulley burnished

 Capstan cleaned (as well as the internal and external surfaces of the original speed sleeve)

 ALL Internal idler tires cleaned / reconditioned

 Rubber pinch roller removed and re-conditioned

 New MAIN drive belt, #42-550 installed

 Brand new counter belt, #048 installed

 Heads have been cleaned and de-magnetized as well as the entire transport (reel and 8-Track Cartridge).

 Brakes adjusted on fast wind modes at ALL points thru a tape. It's a fine line between having the brakes actuate with too much tension, 'abruptly' stopping the tape (risking stretching / breaking of tape) or too loose (allows tape to 'dump'). (VERY difficult to do on this series). Brakes optimized for 7" reels.

 Motor torque test perfectly. Following above adjustments, Reel Start and Stop tested at beginning, middle and end of 7" reels.

 Internal pots, switches (including linear record switch and 'rotary wafer' switches)and controls cleaned and tested for noise-free function (initially, of course, had typical static / noise which is to be expected in an 'un-serviced' deck after 45+ years) (also a bit easier on this "Type-C" version. Just FYI).

 External / User adjustable pots, switches and controls cleaned on the playback / record amp and tested for noise-free function

(tech notes; Line out set to 0dB using 0dB reference @ 700Hz. Vol controls @ approx 1:30)


 Replaced VU meter lamps / bulbs #25-450

 Cleaned 8-Track cartridge heads

 We adjusted the VU meters mechanically and electronically w/ factory test tone tapes, as well as the internal playback levels for both directions independently and record levels.

 We adjusted the output, 'Minimum Input', 'Specified Input', 'Record Level' and 'Bias' all to spec, then further adjusted 'Bias' for Ampex GM-456

 Both spindles in perfect alignment.

 Heads in great shape as well, with many years of performance left in them

 Playback and Record Head alignment / azimuth was adjusted for peak performance with factory test tone tape and oscilloscope.

 Speed tested to 98.8% accuracy following refurb (meaning that our 'verified' 1000Hz test tape now plays back at 988Hz +/- 2Hz. {well within spec by 18Hz}).
 
 Adjusted to record VERY WELL. Biased for Ampex GM 456 studio tape with the following results w/ Input at ~ 9:00 when recording, then Output control ~"2:00 PM" for playback.

 'Real World, DDD CD recorded sounds great w/ Ampex GM456.


 'Electronic' Floor noise measured at >-60dB w/ blank tape, L&R.

 Motor had a slight amount of run-out detected at the belt pulley (side to side movement / play) which causes excessive, ambient noise, so we swapped it with another of the exact motor (we had a 'donor unit'), which was then also, completely disassembled, cleaned and lubed w/ 30W.

(tech notes; internal amp tests well w/ ~ 1mVDC across outputs w/ 8 Ohm load. Also as a side note, the Akai X-1800SD C-Type utilizes the same output transistors as the later Akai X-1810.
)

 This AKAI X-1800SD functions, plays, and records VERY WELL (and we really put them through the paces, testing both with well mixed, recently recorded CD material and CD recorded / factory test tones looking for correct head Azimuth and speed accuracy).  (Total time investment in refurb process / and final testing ~ 21 hours).

The AKAI X-1800SD Stereo Reel to Reel tape deck. Ready to GO! This is one of the few reel to reel decks we get in that make it to our finished page. Great performer. If you're looking for a reel to reel deck to "actually use" here you go. Only about 25% of the used Reel decks out there can be "practically" restored to working order. This one made it through with flying colors after about 21 hours of bench time.

Following mechanical / electronic refurb, entire unit was cosmetically detailed inside and out. Face is made of aluminum and is dent free and in great condition. Cabinet covered in real TEAK wood veneer, is in decent condition with just a few 'battle scars', checking / fading to the finish (see photos above) and just had a fresh coat of Howards 'Restore a Finish' and followed Howards 'Feed-n-Wax'. All the case hardware intact and working, and had all it's fasteners torqued down. Deck looks and sounds great! 
   ____________________________
   
Looks great & "Ready-to-go"  AKAI X-1800SD Stereo Reel to Reel tape deck. Very 'famous' and popular reel tape deck. Probably half the folks stationed overseas in the military during Viet Nam that purchased a Reel to Reel came back with an 1800SD (or one of it's siblings). Unfortunately of course, 50 years has not been kind to Akai Reel decks (or any electro-mechanical devices that are 20 years old or older). The internal lubes were never meant to last that long, certainly without maintenance, and 'rubber' doesn't 'age well' either, thus requiring the above stated work. There's also the Akai Transport cams that need to be inspected for their degree of condition and replaced if necessary (difficult and potentially expensive). We've already inspected them for any detrimental issues. Ready to go now. Will play & Record stereo 1/4" tapes on reels up to 7". This is one of the few reel to reel decks we get in that make it to our finished page. If you're looking for a reel to reel deck to "actually use" then here you go. Only about 25% of the used Reel decks out there can be "practically" restored to working order. This one made it through. Playback & transport functions test great and records well! 8-Track, built-in amp and speakers all work great as well. Looks and sounds great too!
Another note I'd like to make is that the 8-Track is probably the BEST I've ever auditioned (and we've done A LOT of 8-Track decks, and I used to sell them when NEW).

AKAI X-1800SD Features include:


- 4-Speed
* Reel to Reel, 8-Track Cartridge deck w/ built-in speakers and amp
- DURABLE AC powered capstan motor (lasts decades longer than DC capstan motors of the 'later' models)

- Up to 7" reel capacity (while you could go down as far as 3" in diameter, the torque and braking on this deck has been optimized for 7"reels)
- Akai's "Cross-Field" Bias Head, gets the tape 'bias signal' off of the 'Record' head (so the 'Record Head' can be concentrated only on recording the 'music' signal) and biases with a separate head
- One-Micron Gap Recording Head (reel)

- Stereo or MONO playback / recording (reel tape) (means that in "MONO" mode, you can record 4 separate passes on a tape or playback tapes made on older decks that did 'four separate tracks')

- Quad speeds at
7.5 ips / 19cms (with included speed sleeve adapter), 3 3/4ips / 9.5 cms,1 7/8 ips / 4.8 cms & *15 ips / 38cms (requires optional 15ips kit, not available from us.
- As it's got its own, Built-in Power amp and speakers, it can be used as a 'stand alone' unit. (very handy for a media transfer business setting up another 'station' without a stereo / audio system)
- Stereo playback / recording 8-Track Cartridge tape
- Continuous Play or 'End of Tape' Stop for 8-Track (however at this point the 'Auto-Stop' does not seem to recognize the 'sensor' tape on 8-tracks so only does "Continuous Play" at the end of track #4)
- 8-Track 'Track Selector' w/ typical indicator lights
- Auto-Off for Reel deck
- Can also transfer from Reel tape to 8-Track Cartridge tape
*
- Built-in 'Tape Cleaner' pad (can also lube 'back coated' tapes so they don't squeak if you can obtain the correct silicone lube. No, we don't know where to get it at this point...yet)
- Dual front mounted 1/4" Microphone inputs
- Side mounted 1/4" Headphone jack
- RCA and DIN I/O's
- Separate L&R Input / Volume controls
- Separate L&R Tone controls (for built-in amp)

- Internal Speaker On/Off switch (Auto switches when using 'External' speakers)

- NOT an OFFICIAL feature, BUT one function this deck will allow is a sort of CUE by slightly pushing up on the 'pause' lever, while the deck is in play, you can get a 'variable speed' CUE function. You'll either need to very gradually release the pressure or with your other hand move the 'Play' lever to 'Stop' when you reach the spot you wanted to 'cue to' or the tape will track off the front edge of the pinch roller. Takes a bit of practice to get it right.


(*15 ips ONLY w/ optional speed sleeve / pinch roller kit (not typically avail. The 15ips was utilized for transferring Reel tape signals to the 8-Track tape. While the Reel deck could record at 15ips, there's not a 15ips Tape EQ setting, which may or may not be detrimental to your needs)

-True "WORLD AC POWER" allows unit to be operated on 50 or 60 Hz AC and will select voltages from 110v, 120v, 220v and 240 volts AC input.


AKAI X-1800SD Specifications as follows:
 

Heads / Track system: Reel Heads; 4-track 2-channel / Stereo or 1-Channel / Mono heads for stereo or mono, Erase, Recording / Playback & Cross-Field Bias head
Heads / Track system: 8-Track Cartridge; 2-track 2-channel / Stereo  Erase, Recording / Playback
Motor: Two Speed, Induction Motor (drives Reel and Cartridge capstan)
Transport Control Type: Direct linked Mechanical
Maximum Reel capacity: 7" (5" and 3" as well) (brakes and motor torque optimized for 7" reels)
Tape speeds: 1 7/8 ips, 3.75 ips, 7-1/2 ips) and 15 ips w/ optional kit
Tape speed Deviation:
3.0% (ie: 1kHz may = 970Hz-1030Hz)
Fast Wind speed:
~120 secs for 1200 feet (7" reel)
Wow & Flutter: Reel; <0.18% RMS @ 7.5 ips
THD: Reel; <2% @
Line Level out
Frequency response: Reel; 30Hz to 23,000Hz (3dB @ 7-1/2 ips)
 &
30Hz to 18,000 Hz @ 3-3/4 ips
 &
30Hz to 9,000 Hz @ 1 7/8 ips

Cartridge; 50Hz to 15,000Hz (3dB @  3-3/4 ips
Signal to Noise Ratio: > 50dB on R2R and >45dB on Cartridge
Erase Ratio: Reel; >-70 for all tracks
Cartridge; >-65dB
Crosstalk rejection:
Reel; >-65dB in Mono and >-43dB in Stereo
Cartridge; >-50dB in Stereo
Input
Level (Line): 60mV - 2.5V
@ 150k Ohms
Input Level (Mic): 0.5mV - 20mV @ 30k Ohms
Output Level (Line): 1.228V
(0VU) @ 250Hz from recorded tape signal
Bias Frequency: 60kHz
Built-In Power Amp Output: 12 W (6W/Ch) via discrete output transistors
Built-In Speakers: Dual 4", Full-Range


This is only the FIRST AKAI X-1800SD we restored in ~24 years. Great machine for playback / archiving your tapes to CD or Hard Drive or for recording new tapes. This is a beautiful deck. Performs incredibly well following extensive refurbishing.
The wood case is in great 'structural' condition. It exhibits the typical and expected finish fading / checking / dings. The decks face, knobs, covers and all cosmetics are fabulous!

This machines 'Forte' would really be best suited for a 'media transfer' business, especially where you have a bench / station that doesn't have dedicated sound system (as it's go it's own, built-in amp and speakers) or for someone who has a lot of tapes to preview prior to sending for transfer, or for a library or university with a lot of tapes of different speeds / and track formats to transfer. If you're going to be listening to 'quiet, chamber' music while reading, the "AC powered" motor / fan noise could be distracting while 'casually' listening to quiet passages of music. If you tend to like the volume at more than 'low, back ground' levels, then you'll not likely notice "AC powered motor" hum (mechanical only and does not transfer into the 'signal' of the unit).

Measures 13.5" wide x 15" tall x 9.5" deep and weighs 38 lbs unpacked. Includes a set of 'fresh' spindle stoppers / reel clamps. Comes with a pdf 'e' copy of Akai X-1800SD owners manual and original brochure. Can include the AKAI X-1800SD Service Manual pdf 'e' download if you wish as well. Includes our standard 90 day limited warranty.

 (Reels & tape shown in photos not included. All are sometimes available separately depending on stock levels.) 

 AKAI X-1800SD REEL TO REEL TAPE DECK
Cond. 8.5

SOLD 4/2/20
SHIPPING TO BOB IN FLORIDA


(Reels shown in photos are not included, but we sometimes / occasionally have them for sale. Inquire at time of order.
However, all of our decks will come with 2x tapes for testing 'Playback' and 'Recording' as well as a 7" 'take-up' reel, and RCA patch cables for connection to your system)


 
 (Above text property of www.oaktreevintage.com / Oak Tree Enterprises, LLC. See 'Copyright Information' page for details)

(archived)
 

 

 
         

         

       NEW LISTING 2/20/20
(Click on above thumbnails to enlarge photos)
CheckMarkSmall_web.jpg (792 bytes)  warranty**
RESTORED / REFURBISHED / FULLY SERVICED FOR **PLAYBACK
VINTAGE AKAI REEL TO REEL TAPE DECK
AKAI X-1810

COMBO REEL-REEL / 8-TRACK CARTRIDGE
4-TRACK / 2-CHANNEL STEREO or
4-TRACK / 1-CHANNEL MONO 
AKAI's "CROSS-FIELD
" BIAS HEAD
3-SPEEDS
AUTO-REVERSE
BUILT-IN STEREO AMP AND SPEAKERS

1/4" REEL TO REEL

#...
1595
MIJ

  
"
WORLD AC POWER"
Circa 1973-74

SOLD 3/18/2020
SHIPPING TO JOEL IN NEW JERSEY


 Our technician has completely gone through and 'Certified' this unit for PLAYBACK*.

 
We have completely and extensively gone through the mechanicals and electronics of this unit.

 Entire transport was cleaned, de-greased, and re-lubed including; Pinch Roller Pivot Arm, EOT Sensor Arm, Left Tape Tension arm mechanism, Capstan Motor (clean and re-lube), Capstan and flywheel shaft removed cleaned / re-lubed (pretty much every moving part)

 Transport cams checked for usable condition prior to any work starting (here in the West, we have less of an issue with the typical deterioration that you see in more 'humid' climates such as the Mid-West, South and Coasts (be very careful getting an Akai from the early to mid 1970's that has spent most of it's life in a 'humid' environment).

 Entire 8-Track transport assembly was removed and disassembled for service, including burnishing it's connector, and track elevator / selector contacts.



 Voltage re-set to correct 120VAC

 Circuit board edge card contacts and connectors cleaned w/ solvent and burnished w/ fiberglass pen



 Tape Tension arms cleaned and re-lubed, and their springs adjusted

 Bent Reel spindle disassembled completely and center axle straightened on anvil

 Reel table height correct

 pinch-roller 'arm' mechanism completely disassembled, cleaned and re-lubed

 Capstan / flywheel removed, bushings and axles cleaned and re-lubed and flywheel burnished

 Capstan motor pulley burnished

 Capstan cleaned

 Rubber pinch roller removed and re-conditioned

 Main drive belt reconditioned

 Brand new counter belt, #041-042 installed

 Heads have been cleaned and de-magnetized as well as the entire transport (reel and 8-Track Cartridge).

 Brakes adjusted on fast wind modes at ALL points thru a tape. It's a fine line between having the brakes actuate with too much tension, 'abruptly' stopping the tape (risking stretching / breaking of tape) or too loose (allows tape to 'dump'). (VERY difficult to do on this series). Brakes optimized for 7" reels.

 Motor torque test perfectly. Following above adjustments, Reel Start and Stop tested at beginning, middle and end of 7" reels.

 Internal pots, switches (including linear record switch and 'rotary wafer' switches) and controls cleaned and tested for noise-free function (initially, of course, had typical static / noise which is to be expected in an 'un-serviced' deck after 45+ years) (also a bit easier on this "1810D than the "A-Type and B-Type X-1800SD" version. Just FYI).

 External / User adjustable pots, switches and controls cleaned on the playback / record amp and tested for noise-free function

 We adjusted the VU meters mechanically and electronically w/ factory test tone tapes, as well as the internal playback levels for both directions independently and record levels.

 Both spindles in perfect alignment.

 Heads in great shape as well, with many years of performance left in them

 Alignment / azimuth was adjusted for peak performance on Playback and Record Heads on both the R2R and the 8-Track with factory test tone tape and oscilloscope (** still no appreciably positive effect on recording quality).

 "X-Field / Bias" head had it's clearance checked / adjusted w / feeler gauges. (**still no appreciably positive effect on recording quality).

 "X-Field / Bias" head had it's impedance measured at ~2.1-2.2 Ohms, which is what others measure at. (** still no appreciably positive effect on recording quality).

 Slightly noisy tape guide bearing re-lubed with 'heavier' lubricant to quiet operation

 Disassembled and cleaned both 'Manual' Auto-Reverse switches

 Following initial restoration tests, we found we would have a intermittent 'auto-reverse', and traced it to contact issues in the relays, thus the following operation...

 Both Play and Record relays (RL0201 & RL0202) had their contacts burnished on the 'Direction Change' PCB (not an easy task. Then tested 4 Hours with multiple manual reverses)

 Auto-Shut-Off switch cleaned for trouble-free operation (was definitely causing trouble prior to cleaning)

 Speed tested to 99.8% accuracy following refurb (meaning that our 'verified' 1000Hz test tape now plays back at 1000Hz +/- 2Hz. (VERY much within spec).
 
 **Will actually record to a 'usable' level following these tips;
So you can actually make 'usable' recordings on it. You'll have to record at 7.5ips, push the levels more than you normally would into the 'Red', and Record with the EQ setting for 7.5ips. Then Playback with the 'Output' controls set much higher, and the EQ then set to 1 7/8 ips. The playback is decent, just not up to our normal standards. To get the best results, we would recommend Ampex GM-456 or similar, high quality tape. Same technique applies to the 8-Track, except EQ is not used with the 8-Track deck.


 'Electronic' Floor noise measured at >-52dB w/ blank tape, L&R.

 Also following initial refurb, we thought the main cap motor was noisier than it should be, so entire deck was again, removed form housing, and stripped to allow access to Motor, which was then disassembled, had front and rear bushings cleaned and re-lubed w/ 30W. We also changed the cooling fan to a modified unit to reduce 'fan / air' noise at 7.5 ips speed. VERY quiet now.

 Internal, built-in amp and speakers all work fine. Nothing needed for that aspect.

 This AKAI X-1810D PLAYS VERY WELL from the reel to reel section and the 8-Track cartridge section using factory test tones, looking for correct head Azimuth and speed accuracy.  (Total time investment in refurb process / and final testing ~ 30+ hours. OUCH!).

The AKAI X-1810D Stereo Reel to Reel tape deck. Ready to GO! This is one of the few reel to reel decks we get in that make it to our finished page. Great deck for 'Playback' use. As eluded to above, we were not able to get the 'recording capabilities' of either the R2R or the 8-Track Cart aspect up to standard, so again, this deck is for 'Playback' use. This one made it through after about 30+ hours of bench time.

Following mechanical / electronic refurb, entire unit was cosmetically detailed inside and out. Face is made of flat-black finished, aluminum and is dent free and in great condition (except for an additional port / hole in the lower section and a finish chip on the lower, right edge of the case). Really few issues to mention. Deck looks and plays great! 
   ____________________________
   
Looks great & "Ready-to-go", for PLAYBACK, AKAI X-1810D Stereo Reel to Reel tape deck. Very 'famous' and popular reel tape deck. Probably half the folks stationed overseas in the military during Viet Nam that purchased a Reel to Reel came back with an 1800 series. Unfortunately of course, 45 years has not been kind to Akai Reel decks (or any electro-mechanical devices that are 20 years old or older). The internal lubes were never meant to last that long, certainly without maintenance, and 'rubber' doesn't 'age well' either, thus requiring the above stated work. There's also the Akai Transport cams that need to be inspected for their degree of condition and replaced if necessary (difficult and potentially expensive). We've already inspected them for any detrimental issues. Ready to go now. Will play & Record stereo 1/4" tapes on reels up to 7". This is one of the few reel to reel decks we get in that make it to our finished page. If you're looking for a reel to reel deck to "actually use" then here you go. Only about 25% of the used Reel decks out there can be "practically" restored to working order. This one made it through. Playback & transport functions test great and records well! 8-Track, built-in amp and speakers all work great as well. Looks and sounds great too!
Another note I'd like to make is that the 8-Track is among the BEST I've auditioned for playback (and we've restored and sold A LOT of 8-Track decks 'as vintage', and I sold them when NEW as well).

AKAI X-1810 Features include:


- 3 Motor transport
(means less 'Rube Goldberg' mechanisms inside like many R2R's)
- DURABLE AC powered capstan motor (lasts decades longer than DC capstan motors of the 'later' models)
- 4-Speed
* Reel to Reel, 8-Track Cartridge deck w/ built-in speakers and amp
- Up to 7" reel capacity (while you could go down as far as 3" in diameter, the torque and braking on this deck has been optimized for 7"reels)
- Built-In Amp and Speakers for listening WITHOUT a stereo / sound system if desired
- Akai's "Cross-Field" Bias Head
- One-Micron Gap Recording Head (reel)

- Stereo or MONO playback (reel tape) (means that in "MONO" mode, you can playback 4 separate passes on a tape for playback of tapes made on older decks that did 'four separate tracks')

- Quad speeds at
7.5 ips / 19cms (with included speed sleeve adapter), 3 3/4ips / 9.5 cms,1 7/8 ips / 4.8 cms & *15 ips / 38cms
-
Spring loaded, Reel locks / Spindle tips (does not require rubber reel clamps / stoppers)
- Stereo playback / recording 8-Track Cartridge tape
- Auto-Reverse capable with 'sensing foil' installed (on correct side of tape)
- 'Manual-Reverse' at anytime with L & R selectors

- 'Continuous Play' or 'End of Tape Stop' for 8-Track
- S.R.T. Super Range Tape Equalization setting
- Auto-Off for Reel deck
- Dual Analog VU meters

- 8-Track 'Track Selector' w/ typical indicator lights
- Dual front mounted 1/4" Microphone inputs
- Front mounted 1/4" Headphone jack
- RCA and DIN I/O's
- Separate L&R Input / Volume controls
- CUE monitoring in 'fast wind' mode at a moderate volume

- NOT an OFFICIAL feature, BUT one function this deck will allow is a sort of CUE by slightly pushing up on the 'pause' lever, while the deck is in play, you can get a 'variable speed' CUE function. You'll either need to very gradually release the pressure or with your other hand move the 'Play' lever to 'Stop' when you reach the spot you wanted to 'cue to' or the tape will track off the front edge of the pinch roller. Takes a bit of practice to get it right.

- ANOTHER 'UN-OFFICIAL' feature of this deck is that due to it's internal 'brake' design, it's possible to 'SCRATCH' the tape across the playback head forward or backward! Just like with a DJ turntable!

- Separate L&R Tone controls

-True "WORLD AC POWER" allows unit to be operated on 50 or 60 Hz AC and will select voltages from 110v, 120v, 220v and 240 volts AC input (currently set for proper power for North America).


AKAI X-1810 Original Specifications:

 

Heads / Track system: Reel Heads; 4-track 2-channel / Stereo or 1-Channel / Mono heads for stereo or mono, Erase, Recording / Playback & Cross-Field Bias head
Heads / Track system: 8-Track Cartridge; 2-track 2-channel / Stereo  Erase, Recording / Playback
Motors: 3x, One 'Hysteresis Synchronous 3-Speed capstan motor and 2x 6-Pole, Eddy-Current, Outer-rotor motors for supply and take-up reels.
Transport Control Type: Direct linked Mechanical and electronic
Maximum Reel capacity: 7" (5" and 3" as well) (brakes and motor torque optimized for 7" reels)
Tape speeds: 1 7/8 ips, 3.75 ips, 7-1/2 ips) and 15 ips w/ optional kit
Tape speed Deviation:
0.8%
Fast Wind speed:
~60-75 secs for 1200 feet (7" reel)
Wow & Flutter: Reel; >0.08% RMS @ 7.5 ips
THD: Reel; <2% @ 1kHz w/
Line Level out @ 0dB
Frequency response: Reel; 30Hz to 22,000Hz (3dB @ 7-1/2 ips)
 &
30Hz to 18,000 Hz @ 3-3/4 ips
 &
30Hz to 9,000 Hz @ 1 7/8 ips
Cartridge; 50Hz to 16,000Hz (+/-3dB @  3-3/4 ips
Signal to Noise Ratio: > 50dB on R2R and >45dB on Cartridge
Erase Ratio: Reel; >-70 for all tracks &
Cartridge; >-65dB
Crosstalk rejection:
Reel; >-70dB in Mono and >-43dB in Stereo
Cartridge; >-50dB in Stereo
Input
Level (Line): 60mV - 2.5V
@ 150k Ohms
Input Level (Mic): 0.5mV - 20mV @ 30k Ohms
Output Level (Line): 1.23V
(0VU) @ 250Hz from recorded tape signal
Bias Frequency: 65kHz


This is only the third AKAI X-1810 we have restored in ~24 years. Great machine for playback / archiving your tapes to CD or Hard Drive. This is a beautiful deck. Performs incredibly well following extensive refurbishing for PLAYBACK.
The vinyl wrapped, wood-grained case is in great 'structural' and cosmetic condition with only a few issues worth mentioning. One, there's a Formica / finish chip on the lower, right edge of the case. Two, someone added an access port to the front panel, near the 'selector' switches for?. Three, there's a bit of surface corrosion on the rear, lower edge of the black, metal panel. There's also a bit of aluminum corrosion on the lower, front trim piece. Along the sides of the wood housing, are 2 holes from being 'rack mounted' in the past (see photos above). Overall the decks face, knobs, covers and all cosmetics are in good condition.

This machines 'Forte' would really be best suited for a 'media transfer' business, especially where you have a bench / station that doesn't have dedicated sound system (as it's go it's own, built-in amp and speakers) or for someone who has a lot of tapes to preview prior to sending for transfer, or for a library or university with a lot of tapes of different speeds / and track formats to transfer. If you're going to be listening to 'quiet, chamber' music while reading, the "AC powered" motor / fan noise could be distracting while 'casually' listening to quiet passages of music. If you tend to like the volume at more than 'low, back ground' levels, then you'll not likely notice "AC powered motor" hum (mechanical only and does not transfer into the 'signal' of the unit).

Measures 17.5" wide x 18" tall x 9.8" deep and weighs 47 lbs unpacked. Comes with a pdf 'e' copy of Akai X-1810 owners manual and original brochure. Can include the AKAI X-1810 Service Manual pdf 'e' download if you wish as well. Includes our standard 90 day limited warranty.

 (Reels & tape shown in photos not included. All are sometimes available separately depending on stock levels.) 

 AKAI X-1810 REEL TO REEL TAPE DECK

Cond. 8.5

SOLD 3/18/2020
SHIPPING TO JOEL IN NEW JERSEY

as a 'PLAYBACK' unit

**OK, so you CAN actually make 'usable' recordings on it. You'll have to record at 7.5ips, push the levels more than you normally would into the 'Red', and Record with the EQ setting for 7.5ips. Then Playback with the 'Output' controls set much higher, and the EQ then set to 1 7/8 ips. Same process and results for the 8-Track cartridge deck, except ignore the 'EQ' portion. The playback IS decent, just not up to our normal standards.

(Reels shown in photos are not included, but we sometimes / occasionally have them for sale. Inquire at time of order.
However, all of our decks will come with 2x tapes for testing 'Playback' and 'Recording' as well as a 7" 'take-up' reel, and RCA patch cables for connection to your system)


 
 (Above text property of www.oaktreevintage.com / Oak Tree Enterprises, LLC. See 'Copyright Information' page for details)

(archived)
 

 

 
Jensen_System-300_Stereo_Speakers_web.jpg (29583 bytes)       Jensen_System-300_Stereo_Speakers_collage.jpg (206162 bytes)

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CheckMarkSmall_web.jpg (792 bytes) warranty
VINTAGE  
JENSEN

STEREO SPEAKERS

SYSTEM 300
Circa 1981-'85

Made in USA

CURRENTLY HELD FROM SALE

for sale

A bit short in the looks department, but long on sound.

We have completely tested them with both recorded material, PN 20-20k and swept them with our AF generator.
These Jensen "System 300" speakers are very accurate and impressive sounding.  Features:

- 9" woofer
- 1" cloth soft dome tweeter
- Acoustic Suspension cabinet design
- 8
Ω

Foam surround on 9" woofer in fine shape with years life left in it before it will need to be replaced. Medium-dark Oak wood grain vinyl wrap finish in decent shape with a few normal scuffs and dings. Nothing too  distracting from overall appearance (see photos). Original brown grills in fair shape as well with normal amount of snags for 15 years old and unfortunately the small plastic Jensen badges are missing. Grills also have minor, light colored staining on lower 1/3 of each. Speakers test and sound great. Each measures 23" high x 13" wide x 10" deep and weighs a 23 lbs unpacked. Includes our standard speaker warranty ( excluding problems due to under / over powering).
JENSEN SYSTEM 300
Condition 7.5

$239. pair

CURRENTLY HELD FROM SALE


 
 (Above text, in it's entirety, property of www.oaktreevintage.com / Oak Tree Enterprises, LLC. See 'Copyright Information' page for details)
 



   

NEW LISTING 5/9/19
(Click on above thumbnails to enlarge photos)
CheckMarkSmall_web.jpg (792 bytes) warranty
RESTORED / REFURBISHED / FULLY SERVICED
VINTAGE MARANTZ STEREO RECEIVER / CASSETTE TAPE DECK
MARANTZ 4025 'CASSEIVER' (aka MCR-425)
AM/FM STEREO RECEIVER / CASSETTE DECK

#...0181
Circa 1978-80

SOLD 7/30/19
SHIPPING TO TIM IN TENNESSEE

  Our technician has completely gone through and 'Certified' this unit.

 We have completely gone through this unit cleaning everything including all switches, controls and contacts. VERY time consuming to properly service this unit, especially the 8-track deck. Extensive cleaning of unit internally.

 Internal fuses checked for continuity and correct values. No issues found, fortunately. We don't like seeing incorrect fuses having been installed in a unit as that could mean it had prior issues, or if a fuse value was 'increased' it could have allowed too much current through an 'ailing' circuit causing un-due / un-necessary damage.

Controls were 'flooded' w/ 'De-OxId' and are quiet

 Entire transport was disassembled down to the chassis, and every mechanical part was cleaned of "varnished" lubes and re-lubed as well as the always at issue, Pinch Roller plunge assembly, re-lubed and reassembled (VERY DIFFICULT and TIME CONSUMING on this unit)

Main drive belt has been replaced with NEW for trouble free service (#42-1975 and counter belt replace with #030).

Capstan flywheel removed, cleaned, burnished and re-lubed prior to re-install. Entire transport and mechanism has been cleaned, re-lubed and de-magnetized.

Heads have been cleaned and de-magnetized and are in great shape.

Head alignment and azimuth at 125Hz, 1kHz and 10kHz adjusted for BOTH directions for 'peak performance' with O-Scope and w/ STL and TEAC MTT-257H calibration / alignment tapes. Both channels now even output.

Meters adjusted to even zero with symmetric with Volt meter, O-Scope and w/ STL and TEAC MTT-257H calibration / alignment tapes. Both channels now even output.

Both Internal playback amplifier channels adjusted with Volt meter, O-Scope and w/ STL and TEAC MTT-257H calibration / alignment tapes. Both channels now even output.

Meters adjusted to even zero with symmetric input with Volt meter, O-Scope and w/ STL and TEAC MTT-257H calibration / alignment tapes. Both channels now even output.

Both Internal Record amplifier channels adjusted with Volt meter, O-Scope and w/ STL and TEAC MTT-257H calibration / alignment tapes. Both channels now even output.

Record signal path contacts cleaned and burnished for static-free performance

Linear Record switch cleaned so no 'Motor Boating' effect

 
Internal playback, meter and record level pots also adjusted w/ O-scope.

Following refurbishment, Speed checked with factory test tape to 100% accuracy! (meaning in this case, that our 1000Hz test tape plays back at 1000Hz on our Freq Counter Meter)

Deck 'sonically' checked for WOW and Flutter with no appreciable issues

Record Meters adjusted for 'even' readout and performance

Pinch Roller replaced with new, as following initial transport overhaul, we found that occasionally, on certain tapes the original / old pinch roller would 'crinkle / wrinkle' the tape

Floor noise of receiver tested @-60dBm. Floor noise of cassette deck measured with 'blank' Fuji tape at 1.75mVAC.

Tuner string checked for any fraying then re-tensioned to increase traction & relieve flywheel binding and re-centered pointer to correct dial position.

We aligned the tuner front-end for optimum AM & FM performance as older internal tuner components have always drifted on vintage gear over the years. VERY GOOD TUNER! FM sounds fantastic. AM is decent as well.

 All dial, indicator & meter lamps work or were replaced.

 Stereo indicator lamp working

 We also checked the heat sink compound which should be good for another 30 years.

 All inputs tested and both side produces clean and even sine waves into 'brick-wall' 8 & 4 Ohm loads! No power supply hum of any kind. It's dead silent! All functions test fine.
Total restoration time investment 16+ hours.

 Following restoration procedures, the unit was run continuously at medium volume, as all our amplifier / receivers are, into a load with "Loudness" on and both Tone Controls at 10 for 72 hours into a 4 Ohm load.

 On our test bench, each internal amplifier of this particular unit, #...0181, produced peak power of 16 Volts per channel for 28 Watts per channel @ 8 Ohm and 13 Volts @ 4 Ohm for 42 Watts per channel @ 1khz from actual discrete output transistors (2x 2SA1060 and 2x 2SC2484) (ALL the other 'compacts' we were working on utilized STK power pack, which had some to do with why we couldn't resurrect many of them. The DC was just too high in many cases, and couldn't be rectified practically).
 AC Idle current at <.35A, & floor noise-60dBm.
 DC offset checked to <30mVDC / channel (VERY good for a 'compact' unit and as good or better than many separate components).
  ____________________________
  

So, as with anything you want to look up on the 'world wide interweb', you will find a myriad of opinions. Many of them are from folks who have never even personally experienced what they are 'spouting off' about. Well, of course, I have mine too, however, mine will be from someone who does have 'personal experience' with whatever I'm 'expounding' about, and is from 'real world' experiences, 'down in the trenches'. I often get a 'kick' out of what folks have to say (generally negative) about a piece of gear, with no actual, personal experience. Recently read so many opinions of a speaker we had just finished and were about to audition, prior to auditioning them, that I was not holding out much hope for their final performance. Not only was I surprised by their actual performance (in a positive way), they were completely the antithesis of what EVERY opinion on the web stated, with NONE of them ever actually hearing them (they all stated so in their opinions). Anyway, I'll climb down from my 'ivory tower' for a moment just to say that for what this is designed to be it really came out as a wonderful unit following it's 18+ hours of service to bring it back to essentially 'new' condition. Wonderful condition, and for a 'compact system' REALLY GREAT SOUNDING, late 70's, silver face 'Combo' Receiver from Marantz. We've had this for years, but just recently got around to restoring it. We had a few 'compacts' from brands such as Sony, Panasonic, Fisher, Marantz, but most did not pan out (didn't even attempt the 'cheeeeeese' from companies like Electrophonic, GE, Lloyds, Sound Design, Symphonic and a host of other 'bottom feeder' units.

It really is surprising in sonics, performance, feel and quality
. Great performance for a 'small to mid-sized' 2-Channel audio system. This is the only the second or third 'compact' to 'pass muster' in the past couple decades (I think the last one was about 1998 or 99 and shipped to Germany and then the Panasonic we recently posted as well).
This is an INCREDIBLY Musical sounding receiver. Lot's of surprising 'punch' and volume.
Yes, I know, it's a 'compact' and not a 'separate component', but it really is that nice!!! Enough power for up to 'medium-large' / 10" woofer speakers.
Interestingly, this unit also has the most extensive 'spec listing' of any unit we've ever posted, even over such units as a Pioneer SX-1980 (not even considering that it's 2 units in one). And, the specs are quite respectable in most aspects!

Marantz 4025 / MR425 Features:
  
Receiver
features:
-
Weighted flywheel, analog, slide rule tuning
- Separate Bass and Treble controls utilizing high quality de-tented pots
- Oversize volume control,utilizing high quality de-tented pot
- "Loudness" function to boost Bass and Treble in relationship to Mid frequencies at lower volume levels for a much fuller sound.
- FM Muting (separate from 'Stereo / Mono' switch)
- Stereo / Mono selector
(Separate from 'FM Muting' switch)
- LED Stereo
Indicator
- Hi filter for reducing tape hiss / electronic hiss & noise and record static

- Phono / Turntable input with Built-In Phono Pre-Amp
- Tape Input from built-in cassette deck (not for signal processor insertion)
- Tape Output RCA jacks (Record Out / 'Pre-Volume', Line Level output jacks for any Source)
- Aux input (may also be used for Video / CD / DVD /DAT / VCR / MP3 / iPod / iPhone / iTouch / i-gadget / MP3 / XM / SIRUS  etc.)

- Microphone Input to tape
(be careful with your speakers if using an 'open / live' mic with home-audio speakers)
- A, B, or A+B speaker selector

- Standard 1/4" Stereo Headphone jack

- Built-in, internal AM ferrite antenna
- Externally located 'Mains' protection fuses located on rear panel
- Un-switched convenience AC outlet with 200 Watts capacity

Cassette Deck features:
- Stereo Playback and Recording 
- Super-Hard, 'Permalloy' PB / REC head
- 2-Position Tape Recording Bias selector
- 2-Position Tape EQ selector (for PB and REC)
- Dolby B NR
- Dual Back-lit, analog, Record Level VU level meters for Record and PB levels
- Separate L & R Input level controls or 'Auto-Level' Limiter
- Locking Fast Forward and Re-Wind

- 'Pause' function
- Analog / Mechanical Tape Counter

- Standard / 1/4" microphone inputs mounted on the front panel
- Microphone Input
- Rear mounted RCA I/O's

MARANTZ 4025 SPECIFICATIONS:

POWER / PRE AMP SPECIFICATIONS:
THD;
0.1% @ full rated power @ 1kHz.
Power Frequency bandwidth of power amp section; 16-30,000Hz
Frequency bandwidth of Pre-amp section; 18-24,000Hz (measured at AUX)
 IMD utilizing AUX; 0.1% @ full rated power / 20-20kHz and 8 Ohms
 Damping factor; 30 @ 8Ω full bandwidth
RMS rated Power: 2 x 25 Watts @ 8 Ohms or 30 Watts @ 4 Ohms
Headphone Jack Load Impedance; 8 Ohms
  Hum and Noise; >80dB on AUX / Tape
Input Sensitivity AUX / Tape; 180mV @ 20kΩ
Channel Balance @ 0 to -40dB / 40-16kHz;
1.5dB ALL inputs
Inter-channel Crosstalk; 47dB (non-Phono)
Record Out Levels / Impedance; 500mV / 220 Ohms @ 1kHz
Bass Control;
likely approx 10dB @ 10hz
Treble Control; 
likely approx 10dB @ 20khz
High Filter; -10dB @ 8kHz @ 12dB Oct!
"Loudness" Contour;  likely approx +8dB @ 50hz, +3dB @ 10khz (w/ volume set at -30dB)

TUNER SPECS FOR FM:
Tuning Range;
87.4 - 109MHz (a bit wider than most tuners!)
Freq Response;
30-15kHz (limited by FCC)
S/N (Weighted); > 62db Stereo w/ 1mV input
Usable Sensitivity @ 40kHz Deviation & @ 98 Mhz:
Mono; (1.7 uV)
Stereo; 60 uV)

Capture Ratio; 1.0dB (approx)
IF Rejection; >90dB
Alternate Channel Selectivity @ 98mHz (300kHz); >65dB
Image Response Ratio: 50 dB
Spurious Response Rejection: 90 dB
AM Supression; 50dB
Pilot Signal & Subcarrier Rejection: 19kHz = 58 dB & 38kHz = 58 dB
THD w/ 100% modulation Mono; 0.2%
THD w/ 100% modulation Stereo0.3%
Stereo Separation; >42dB
Channel Balance;
1.0dB
Output Voltage @ 1kHz; 600mV
Output Impedance @ 1kHz; 4.4k Ohms
Ant Terminals;
Balanced 300 Ohms / Un-balanced 75 Ohms

TUNER SPECS FOR AM:
Tuning Range;
525-1620kHz
(a bit wider than most tuners!)
Useable Sensitivity @ 26dB S/N, 30% Modulation @ 1Mhz;
20 uV with ferrite stick antenna
Image Rejection @ 1 Mhz; 41dB
IF Rejection @ 1 Mhz; 55dB
Selectivity @ 1 Mhz 9kHz: 20dB

Spurious Response Rejection
@ 1 Mhz: 38 dB
THD w/ 100% modulation Mono; 1.0%
Freq Response; 40- ~ 2.2kHz

S/N @ 1 Mhz: > 43db

PHONO SECTION SPECS:
Freq Response;
RIAA Standard Curve +/- 2dB.

S/N;
>72 dB

Input Sensitivity;
2.7 mV @ 47
 Overload 'Margin';
31dB
Inter-channel Crosstalk;
45dB (Phono)

Cassette Deck Specifications:
 
Track format: 
4 track / 2 channel
Motors:
 1x DC Servo Controlled
Tape Speed
: 
1 7/8 ips / 4.75 cm/sec
Heads: 2x; RP Super-Hard Permalloy. Erase is Ferrite
Recording System: AC Bias
Erasing System
: AC Erase
Meters
: 
Standard VU
Overall Frequency Response (Dolby Off);

40-14kHz +/- ~3db w/ Ferric Oxide Tape @ -20dB
40-13.5kHz +/- 3db w/ CrO2 Tape @ -20dB
40-12.5k
Hz +/- 3db w/ 'Normal' Tape @ -20dB
Harmonic Distortion / THD:
3.0%
 w/ Ferric Oxide Tape @ -20dB
3.0%
w/ CrO2 Tape @ -20dB
2.2% w/ 'Normal'
Tape @ -20dB
Wow & Flutter (WRMS):
0.18% wtd
S/N ratio w/ CrO2 tape:
>52dB w/ Dolby B OFF & >58dB w/ Dolby B ON (over 5kHz and and High Bias Tapes)
Line Input Level and Impedance ('Nominal'): 22dB @ 20K Ohms
Microphone Input Level and Impedance ('Nominal'):
72dB @ 10K Ohms
Line Output Level and Impedance ('Nominal'): 500mV @ 2K Ohms
Fast Wind Time:
~105 Seconds for C-60 tape

General
Specifications:
AC / Mains Power Requirements; 120 VAC @ 60Hz
Power consumption;
Idling Current 28Watts & 130 Watts at rated Output both channels
Semiconductor Complement:
Integrated Circuits; x7
Transistors; x61
Diodes; x43
Field Effect Transistors; x1
Weight: Stand alone; 28.6 lbs / 13.0 kgs & Originally packed; 33.0 lbs / 15.0 kgs


Again, we have done the previously stated refurbishment / restoration work (~16+ hours) on this unit to insure its performance, and it gets our full 'Certification'. All functions tested for perfect operation. Overall, it is in great cosmetic condition! Looks and sounds great! Measures 22.5" wide x 6.5" tall x 16.5" deep and weighs 29 lbs unpacked. Includes our standard 90 day limited warranty.
Cond. 8.5
Marantz 4025 / MRC425 Stereo Receiver / "Casseiver"

SOLD 7/30/19
SHIPPING TO TIM IN TENNESSEE


(Above text, in it's entirety, property of www.oaktreevintage.com / Oak Tree Enterprises, LLC. See 'Copyright Information' page for details)

 

 
 
    

 

NEW LISTING 12/14/17
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CheckMarkSmall_web.jpg (792 bytes) warranty
STEREO / QUADRAPHONIC
RESTORED / REFURBISHED / FULLY SERVICED
VINTAGE STEREO RECEIVER SANSUI QUADRAPHONIC / 4-CHANNEL / 2-CHANNEL STEREO RECEIVER
SANSUI QRX-7500 RECEIVER
#...0232
Circa 1973-75

"WORLD AC POWER"
 M.I.J.

SOLD 1/4/19
SHIPPING TO ED IN FLORIDA

  Our technician has completely gone through and 'Certified' this unit.

  We have completely gone through this unit cleaning everything including all switches, controls and contacts. Extensive cleaning of unit internally.

 Internal fuses checked for continuity and correct values. No issues found, fortunately. We don't like seeing incorrect fuses having been installed in a unit as that could mean it had prior issues, or if a fuse value was 'increased' it could have allowed too much current through an 'ailing' circuit causing un-due / un-necessary damage.

  Controls were 'flooded' w/ 'De-OxId' and are quiet

 Tuner string checked for any fraying then re-tensioned to increase traction & relieve flywheel binding and re-centered pointer to correct dial position.

  We aligned the tuner front-end for optimum AM & FM performance as older internal tuner components have always drifted on vintage gear over the years. VERY GOOD TUNER! AM seems to be an 'afterthought' on many stereo receivers and component tuners. The AM is above average for a 'stereo receiver' on this SANSUI QRX-7500. 

 All dial, indicator & meter lamps 'proactively' replaced for a TOTAL OF 26!!!

  We also checked the heat sink compound which should be good for another 30 years.

 Amplifier section had output bias adjusted to spec levels of ~24.8mVDC on all four amplifiers.

  DC offset adjusted to VERY LOW levels on all four amplifiers.

 All inputs tested and both side produces clean and even sine waves into 'brick-wall' 8 & 4 Ohm loads! No power supply hum of any kind. It's dead silent! All functions test fine.
Total restoration time investment 15 hours.

 Following restoration procedures, the unit was run continuously at medium volume, as all our amplifier / receivers are, into a load with "Loudness" on and both Tone Controls at 10 for 72 hours into a 4 Ohm load.
 
On our test bench, this particular QRX-7500, #...0232, 'FRONT' amplifiers each produced 18 Volts per channel for 40 Watts per channel @ 8Ω via discrete output & 15 Volts per channel for 56 Watts per channel @ 4Ω
and
REAR' amplifiers each produced 11.5 Volts per channel for 16+ Watts per channel @ 8Ω via discrete output & 10 Volts per channel for 25 Watts per channel @ 4Ω
via discrete, Metal cased, TO-3 outputs.
(AC draw at idle .5A tested. DC as follows
FR = -1.0 mVDC
FL = +1.0 mVDC
RR = +2.5 mVDC
RL = -2.5 mVDC

(Floor noise measured at >60dBm / 0.1mVAC)
 ___________________________

 
HUGE and VERY IMPRESSIVE looking, Sansui, brushed silver, QUAD receiver, surrounded by handsome, real Walnut wood veneer side plates. This unit has THE highest 'KPD-Factor' of any we've had in a long time. What's a 'KPD Factor'? 'Knobs per Dollar! You could also say it has very high 'MPD' and 'LPD' factors as well (you should be able to figure those out now). Features gorgeous, back-lit slide rule analog tuning scale with matching VU meters as well. VERY elegant and IMPRESSIVE unit when lit in a darkened room.
'Heavy' built, machined aluminum knobs and button caps, also make this unit a pleasure to 'feel'. One of the most 'fun' receivers I've used in a long time. Would love to abscond with this one myself.
Sansui QRX-7500 Features include:
  

- Quadraphonic (sometimes spelled "quadriphonic" or "quadrophonic") / Stereo receiver 
- Weighted flywheel analog tuning
- A, B, Off or A+B Front and Rear speaker positions
- Separate Front and Rear, Bass and Treble controls
- Balance controls allow complete blending between Front and Rear / Left and Right
 - Built-in Hi and Sub filters (separately switchable Front and Rear) for reducing 19kHz pilot tone in FM broadcasts, Tape Hiss and the Sub filter for reducing turntable rumble
- FM muting
- ''Function Control' selector for 2-Channel Stereo, & 4-Channel modes of ''QS Synthesizer' (To convert (synthesize) conventional, 2-channel / stereo program sources to 4-Channel stereo output), 'QS Regular Matrix' (to decode and reproduce 4-channel program sources (records, tapes and their respective broadcasts),  ''Phase Matrix' (to decode and reproduce 4-channel program sources, encoded with the CBS / SQ matrix system) or 'CD-4 / Discrete' (when wishing to hear discrete 4-channel tapes or CD-4 (Quadradisc) records).
- Aux inputs for both Front and Rear (may also be used for Video / CD / DVD /DAT / VCR / MP3 / iPod / iPad / iPhone / iTouch / i-gadget / MP3 / XM / SIRUS  etc.)

- Dual tape monitors with Tape monitor A also featuring a DIN input as well as the standard RCA I/O's for both Front and Rear
  (Tape Monitors can be used with Tape decks such as Cassette Tape Recorders/ Players, Reel to Reel's, 8-Track Tape Cartridge Decks, Video / CD / DVD / VCR / DAT / MP3 / iPod / iPad / iPhone / iTouch / i-gadget / MP3 / XM / SIRUS CDR (CD recorders as well as for inserting signal processors, such as EQ's, Reverbs, Spatial Enhancers / Dynamic Processors, Noise Reduction units, Special Effects units, Time Delays, etc)
-  Dual Phono / Turntable inputs with Built-In Phono Pre-Amp, featuring 'Phono-2' compatible with 'CD-4' cartridges
- Loudness control for increasing 'rock-n-roll smile' tone curve at lower volumes
- Front and Rear 1/4" stereo headphone jacks for connection of either 'stereo' headphones, or 'quadraphonic / 4-channel' headphones
- Tu
ning
DArsonval meters for tuning and signal strength
- Quad VU meters for channel levels
-'CD-4' Level adjustments located on front panel for Carrier Level, and L/R Separation of Quad discs / records.

- Rear located, full barrier strip for external antenna connections
- Rear located main AC protection fuse
- Dual AC convenience outlets on rear panel with 1 switched and 1 un-switched for a total capacity of 250 Watts of accessories
  - True
WORLD AC POWER"

   as it will work on both 50 or 60 Hz AC and voltages from 110-240 Volts AC


Sansui QRX-7500 Original Specs:

 POWER / PRE AMP SPECIFICATIONS:
THD;
0.3% @ full rated power @ 1kHz.
 Freq Response of power amp section; 30-30kHz @ 1W
 Power bandwidth of power amp section; 10-30,000Hz 0dB
 IMD utilizing AUX;
 0.3% @ full rated power / 20-20kHz and 8 Ohms
 Damping factor; 40 @ 8Ω full bandwidth
Dynamic rated Power: 2 x 180 Watts @ 8 Ohms or 260 Watts @ 4 Ohms

Cont rated Power:
4x 32 Watts @ 8 Ohms / 1kHz (BOTH channels driven)
4x 52 Watts @ 8 Ohms / 1kHz (each channel driven)
4x 35 Watts @ 4 Ohms / 1kHz (each channel driven)
4x 28 Watts @ 8 Ohms / 1kHz (ALL channels driven)
4x 25 Watts @ 4 Ohms / 1kHz (ALL channels driven)


  Hum and Noise; >80dB on AUX / Tape
Input Sensitivity AUX / Tape; 100mV @ 50kΩ
Record Out Levels; 100mV
Bass Control;  12dB @ 50hz (most amp tone controls are only +/- 10dB)
Treble Control;  12dB @ 15khz (most amp tone controls are only +/- 10dB)
Low Filter;  -10dB @ 50Hz @ 6dB Oct
High Filter;  -10dB @ 10kHz @ 6dB Oct
"Loudness" Contour;  +8dB @ 50hz, +3dB @ 10khz (w/ volume set at -30dB)


TUNER SPECS FOR FM:
Tuning Range;
88-108MHz
Freq Response;
30-15kHz (limited by FCC)
S/N; > 65db Stereo w/ 1mV input
Mono Sensitivity; 1.9 μV
Capture Ratio; <2.0dB
IF Rejection; >90dB
Image Rejection; >75dB
Spurious Noise Ratio; >80dB
Selectivity; >60dB
THD w/ 100% modulation Mono; 0.3%

THD w/ 100% modulation Stereo0.5%
Stereo Separation; >37dB


TUNER SPECS FOR AM:
Tuning Range;
535-1605kHz
Useable Sensitivity; 50db/m with ferrite stick antenna
Image Rejection; >80dB
IF Rejection; >80dB
Selectivity; 25dB

PHONO SECTION SPECS:
Freq Response;
20-20kHz RIAA Standard Curve +/- 1dB.

S/N;
>70 dB

Input Sensitivity;
2.5 mV @ 50kΩ
 Overload limit;
150mV w/ 0.5% THD @ 1kHz

CD-4 DEMODULATOR:
Input Sensitivity;
2.5mV (adjustable 1 TO 10mV)
Input Impedance; 50kΩ
Freq Response (STD test signal); Main Channel 30-15kHz, Sub Channel 30-10kHz

 Power consumption;
140 Watts at rated
  

Again, as stated before, we have completely gone through this SANSUI QRX-7500 Quad receiver, cleaning and testing all and it gets our full 'Certification'. Everything is in fabulous electrical and cosmetic condition! Looks near new and sounds great! AMAZING looking when lit up at night or in a darkened room! Again, this unit is a 'blast' to use. It just simply 'feels nice'!
Comes with an 'e-copy / PDF download of the SANSUI QRX-7500 owners / users manual, and the service manual if the purchaser desires.  Measures 23.5" wide x 8" tall x 14.5" deep and weighs an impressive 55 lbs unpacked. Includes our standard 90 day limited warranty
.
SANSUI QRX-7500 STEREO RECEIVER
Cond. 8.5+++

SOLD 1/4/19
SHIPPING TO ED IN FLORIDA

(Above text, in it's entirety, property of www.oaktreevintage.com / Oak Tree Enterprises, LLC. See 'Copyright Information' page for details)
 
 

    

          NEW LISTING 1/1/19
(Click on above thumbnails to enlarge photos)
CheckMarkSmall_web.jpg (792 bytes) warranty
RESTORED / REFURBISHED / FULLY SERVICED / WARRANTED
VINTAGE PANASONIC STEREO RECEIVER / 8-TRACK TAPE
PANASONIC RA-6800
AM/FM STEREO RECEIVER / 8-TRACK DECK

#...0512
Circa 1973-76
MIJ

SOLD 7/23/2020
SHIPPING TO FT COLLINS, CO.


  Our technician has completely gone through and 'Certified' this unit.

  We have completely gone through this unit cleaning everything including all switches, controls and contacts. VERY time consuming to properly service this unit, especially the 8-track deck. Extensive cleaning of unit internally.



 Internal fuses checked for continuity and correct values. No issues found, fortunately. We don't like seeing incorrect fuses having been installed in a unit as that could mean it had prior issues, or if a fuse value was 'increased' it could have allowed too much current through an 'ailing' circuit causing un-due / un-necessary damage.

Controls were 'flooded' w/ 'De-OxId' and are quiet

  Entire transport was disassembled down to the chassis, and every mechanical part was cleaned of "varnished" lubes and re-lubed as well as the always at issue, Pinch Roller plunge assembly, re-lubed and reassembled (VERY DIFFICULT and TIME CONSUMING on this unit)

Cracked head mount repaired to allow accurate head azimuth and track alignment (8-track head mounting brackets are cracked about 80% of the time, but you won't know unless you disassemble to the point to allow a visual on it).

Main drive belt has been replaced with NEW for trouble free service (#42-480).

Replaced bad track indicator lamps, and checked the balance for function

Capstan flywheel removed, cleaned, burnished and re-lubed prior to re-install. Entire transport and mechanism has been cleaned, re-lubed and de-magnetized.

Program change mechanism and indicator contacts cleaned / burnished and re-lubed for trouble-free program changes. All original program indicator lamps now work fine.

Heads have been cleaned and de-magnetized and are in great shape.

Head azimuth & track cross-talk adjusted for optimum performance and the best high-frequency response (not normally expected from 8-track cartridge performance) utilizing RCA #356 and 8TSC-101, Aspen 'Deck Tester' and Audio-Tex 30-312 Test / Alignment tapes, a dual trace Oscilloscope and frequency counter.

Track alignment adjusted to eliminate 'cross-talk' between tracks and to ensure the best high-frequency response (not normally expected from 8-track cartridge performance) utilizing RCA #356 and 8TSC-101, Aspen 'Deck Tester' and Audio-Tex 30-312 Test / Alignment tapes, a dual trace Oscilloscope and frequency counter as well as our 'best' pre-recorded tapes.  Deck now has clear sounding highs even when using pre-recorded tapes.

Record signal path contacts cleaned and burnished for static-free performance

Linear Record switch cleaned so no 'Motor Boating' effect

 
Internal playback, meter and record level pots also adjusted w/ O-scope.

Following refurbishment, Speed checked with factory test tape to 98.5% accuracy! (meaning in this case, that our 1000Hz test tape plays back at 985Hz on our Freq Counter Meter)

Deck 'sonically' checked for WOW and Flutter with no appreciable issues

Record Meters adjusted for 'even' readout and performance

Floor noise tested @ -60dBm

Since we also burnished the program track light contacts, they all light and are responsive. Unit works and sounds GREAT!

Tuner string checked for any fraying then re-tensioned to increase traction & relieve flywheel binding and re-centered pointer to correct dial position.



  We aligned the tuner front-end for optimum AM & FM performance as older internal tuner components have always drifted on vintage gear over the years. VERY GOOD TUNER! AM seems to be an 'afterthought' on many stereo receivers and component tuners. The AM is above average for a 'stereo receiver' on this Panasonic RA-6800. 

 All dial, indicator & meter lamps work or were replaced.

 Stereo indicator lamp replaced (even though original was working)

 We also checked the heat sink compound which should be good for another 30 years.

 All inputs tested and both side produces clean and even sine waves into 'brick-wall' 8 & 4 Ohm loads! No power supply hum of any kind. It's dead silent! All functions test fine.
Total restoration time investment 15+ hours.

 Following restoration procedures, the unit was run continuously at medium volume, as all our amplifier / receivers are, into a load with "Loudness" on and both Tone Controls at 10 for 72 hours into a 4 Ohm load.
  
Mechanically the only issue worth mentioning is that that due to a cracked gear, common to about 50% of the 8-tracks out there, the tape counter was 'defeated' and the window is not 'blank'. About the only cosmetic issue worth mentioning is that I'm pretty sure the plexi dial window was less yellow when new.

 On our test bench, each internal amplifier of this particular unit, #...0512, produced peak power of 15 Volts per channel for 28 Watts per channel @ 8 Ohm and ~12 Volts @ 4 Ohm for 36 Watts per channel @ 1khz. (Dual STK078).
 AC Idle current at <.3A, & floor noise -60dBm.
 DC offset checked to <30mVDC / channel (very good for a 'compact' unit).
  ____________________________
  

Wonderful condition, and REALLY GREAT SOUNDING, mid 70's silver face 'Combo' Receiver from Panasonic. It really is surprising in sonics, performance, feel and quality. Great performance for a 'small to mid-sized' 2-Channel audio system. This is the first 'compact' we have 'pass muster' in the past couple decades (I think the last one was about 1998 or 99 and shipped to Germany).
This is an INCREDIBLY Musical sounding receiver. Lot's of surprising 'punch' and volume. It's also one of the best sounding 8-track decks we've auditioned (following restoration). Playback of 'quality' tapes is punch, balanced and bright (typically fairly un-common on 8-track decks). Recording is decent as well, but the playback quality is fabulous. Probably one of the top 2 or 3 decks we've ever had for playback sonics.
Yes, I know, it's a 'compact' and not a 'separate component', but it really is that nice!!! Enough power for up to 'medium-large' / 10" woofer speakers.

Panasonic RA-6800 Features:
  
Receiver:
-
Weighted flywheel analog slide rule tuning
- Separate Bass and Treble controls utilizing high quality de-tented pots
- "Loudness" function to boost Bass and Treble in relationship to Mid frequencies at lower volume levels for a much fuller sound.
- FM auto/muting and mono selection
- AFC (Auto Frequency Control) locks stations in for 'drift free' reception
- AM noise filter (located on rear panel)

- Dual Analog back lit meters for tape recording level and tuner signal strength
- Phono / Turntable input with Built-In Phono Pre-Amp for both Magnetic or Ceramic / Piezo cartridges
- Separate 'True' Tape Monitor with a DIN input as well as the standard RCA I/O's
  (Tape Monitors can be used with Tape decks such as Cassette Tape Recorders/ Players, Reel to Reel's, 8-Track Tape Cartridge Decks, Video / CD / DVD / VCR / DAT / MP3 / iPod / iPad / iPhone / iTouch / i-gadget / MP3 / XM / SIRUS CDR (CD recorders as well as for inserting signal processors, such as EQ's, Reverbs, Spatial Enhancers / Dynamic Processors, Noise Reduction units, Special Effects units, Time Delays, etc)
- Aux input (may also be used for Video / CD / DVD /DAT / VCR / MP3 / iPod / iPhone / iTouch / i-gadget / MP3 / XM / SIRUS  etc.)

- Microphone Input with 'mixing' function to add voice to music
(be careful with your speakers if using an 'open / live' mic with home-audio speakers)
- A, B, or A+B speaker selector
- Built-in, internal AM ferrite antenna
- Externally located Speaker / Amp protection fuses located on rear panel
- Dual 200 watt convenience AC outlets for a total of 300 Watts capacity

8-Track cartridge features:
- Stereo Playback and Recording 
- Back-lit, analog, Record Level VU level meters
- Separate L & R Input level controls or 'Auto-Level' selector
- LOCKING Fast Forward (very valuable, time / money saving feature if you have a 'media transfer business' or are transferring your own tapes to CD / computer files)
- Auto-Stop
for 'current track selection' for playback or recording (again, very valuable feature if you have a 'media transfer business' or are transferring your own tapes to CD / computer files)
- 'Pause' function
- Power assist Eject
- Single Track Repeat function

- 1/8" microphone inputs mounted on the front panel
- Microphone Input with 'mixing' function to add voice to music recordings on 8-Track
- 1/4" Stereo Headphone jack
- Rear mounted RCA I/O's

Again, we have done the previously stated refurbishment / restoration work (~15+ hours) on this unit to insure its performance, and it gets our full 'Certification'. All functions tested for perfect operation. This receiver has an awesome tuner. Overall, it is in great cosmetic condition! Looks and sounds great! Measures 19" wide x 7" tall x 16" deep and weighs 26 lbs unpacked. Includes our standard 90 day limited warranty.
Cond. 8.5
PANASONIC RA-6800 STEREO / 8-TRACK RECEIVER

SOLD 7/23/2020
SHIPPING TO FT COLLINS, CO.


(Above text, in it's entirety, property of www.oaktreevintage.com / Oak Tree Enterprises, LLC. See 'Copyright Information' page for details)

 

  





       NEW LISTING
6/21/19
(click on above thumbnails to enlarge photos)
CheckMarkSmall_web.jpg (792 bytes) warranty
RESTORED / REFURBISHED / FULLY SERVICED / WARRANTED
VINTAGE SANSUI STEREO QUADRAPHONIC / 4-CHANNEL / 2-CHANNEL STEREO RECEIVER
SANSUI QRX-6500 RECEIVER
#...0464
Circa 1973-75
"WORLD AC POWER"
 M.I.J.
SOLD 7/28/2020
SHIPPING TO GREG IN LAS VEGAS


  Our technician has completely gone through and 'Certified' this unit.

  We have completely gone through this unit cleaning everything including all switches, controls and contacts. Extensive cleaning of unit internally.

 Internal fuses checked for continuity and correct values. No issues found, fortunately. We don't like seeing incorrect fuses having been installed in a unit as that could mean it had prior issues, or if a fuse value was 'increased' it could have allowed too much current through an 'ailing' circuit causing un-due / un-necessary damage.

 Controls were 'flooded' w/ 'De-OxId' and are quiet

 Tuner string checked for any fraying then re-tensioned to increase traction & relieve flywheel binding and re-centered pointer to correct dial position.

  We aligned the tuner front-end for optimum AM & FM performance as older internal tuner components have always drifted on vintage gear over the years. VERY GOOD TUNER! AM seems to be an 'afterthought' on many stereo receivers and component tuners. The AM is above average for a 'stereo receiver' on this SANSUI QRX-6500. 

  Most lamps; dial, Stereo indicator, 2/4 Channel indicator, "Discrete", 2-Channel Aux, 'FM', 'Phono-1', Stereo Decoder & meter lamps 'proactively' replaced for a TOTAL OF 19!!!

This unit utilizes 'Mica' output transistor insulators, do no heat sink compound to worry about drying up.

 Amplifier section had output bias adjusted to spec levels of ~25-30mVDC on all four amplifiers.

 NOW all 4 amplifiers have 'even' clipping on 'plus' and 'minus' rails.

  DC offset adjusted to VERY LOW levels (<10mVDC) on all four amplifiers.

 All inputs tested and both side produces clean and even sine waves into 'brick-wall' 8 & 4 Ohm loads! No power supply hum of any kind. It's dead silent! All functions test fine.
Total restoration time investment 17 hours
.

 Following restoration procedures, the unit was run continuously at medium volume, as all our amplifier / receivers are, into a load with "Loudness" on and both Tone Controls at 10 for 72 hours into a 4 Ohm load.
 
 On our test bench, this particular QRX-6500, #...0464, 'FRONT' amplifiers each produced 19.4 Volts per channel for 47 Watts per channel @ 8Ω via discrete output & 16.4 Volts per channel for 66+ Watts per channel @ 4Ω
and
 REAR' amplifiers each produced 17.5 Volts per channel for 38+ Watts per channel @ 8Ω via discrete output & 15 Volts per channel for 56 Watts per channel @ 4Ω
via discrete, Metal cased, TO-3 outputs.
 AC draw at idle .4A tested.
 DC Offset adjusted and measured down to <10mVDC any one channel
 Floor noise measured at >60dBm / 0.1mVAC
 ___________________________

 

HUGE and VERY IMPRESSIVE looking, Sansui, brushed silver, QUAD receiver, surrounded by handsome, real Walnut wood veneer side plates.  Features gorgeous, back-lit slide rule analog tuning scale with matching VU meters as well. VERY elegant and IMPRESSIVE unit when lit in a darkened room. 'Heavy' built, machined aluminum knobs and button caps, also make this unit a pleasure to 'feel'. This receiver is a 'blast' to use and listen to.

Sansui QRX-6500 Features include
:
  

- Quadraphonic (sometimes spelled "quadriphonic" or "quadrophonic") / Stereo receiver 
- Weighted flywheel analog tuning
- A, B, C Off or A+B or A+C Front speaker positions
- A, B, Off or A+B Rear speaker positions
- Separate Front and Rear, Bass and Treble controls
- Balance controls allow complete blending between Front and Rear / Left and Right
 - Built-in Hi and Sub filters (separately switchable Front and Rear) for reducing 19kHz pilot tone in FM broadcasts, Tape Hiss and the Sub filter for reducing turntable rumble
- FM Stereo / Mono (separate from 'FM Muting' selector)
- FM muting (separate from 'Stereo' selector)
- Mode Selector (EXTENSIVE SELECTION) for Stereo / Mono / 2-Channel / 4-Channel and more...

- ''Synthesizer / Decoder Function Control' selector for 2-Channel Stereo, & 4-Channel modes of ''QS Synthesizer' (To convert (synthesize) conventional, 2-channel / stereo program sources to 4-Channel stereo output),
Hall; "To enjoy the kind of 'presence' you'd feel if you were seated front and center in a concert hall, theater, or jazz club..."
Surround; "To drown yourself in the middle of the music. The performing artists will surround you, making you feel as if you were participating."

'QS Regular Matrix' (to decode and reproduce 4-channel program sources (records, tapes and their respective broadcasts), 
''Phase Matrix' (to decode and reproduce 4-channel program sources, encoded with the CBS / SQ matrix system)
or
'CD-4 / Discrete' (when wishing to hear discrete 4-channel tapes or CD-4 (Quadradisc) records).
- Aux inputs for both Front and Rear (may also be used for Video / CD / DVD /DAT / VCR / MP3 / iPod / iPad / iPhone / iTouch / i-gadget / MP3 / XM / SIRUS  etc.)

- Dual tape monitors with Tape monitor A also featuring a DIN input as well as the standard RCA I/O's for both Front and Rear
  (Tape Monitors can be used with Tape decks such as Cassette Tape Recorders/ Players, Reel to Reel's, 8-Track Tape Cartridge Decks, Video / CD / DVD / VCR / DAT / MP3 / iPod / iPad / iPhone / iTouch / i-gadget / MP3 / XM / SIRUS CDR (CD recorders as well as for inserting signal processors, such as EQ's, Reverbs, Spatial Enhancers / Dynamic Processors, Noise Reduction units, Special Effects units, Time Delays, etc)
-  Dual Phono / Turntable inputs with Built-In Phono Pre-Amp, featuring 'Phono-2' compatible with 'CD-4' cartridges

- Separate Front and / or Rear Loudness control for increasing 'rock-n-roll smile' tone curve at lower volumes
- Front and Rear 1/4" stereo headphone jacks for connection of either 'stereo' headphones, or 'quadraphonic / 4-channel' headphones
- Dual Tuning DArsonval meters for tuning and signal strength

 - AM Local / Distant selector on rear panel

- Rear located, full barrier strip for external antenna connections
- Rear located main AC protection fuse
 - 4 Externally mounted speaker protection fuses on rear panel
- Triple AC convenience outlets on rear panel with 1 switched and 1 un-switched for a total capacity of 250 Watts of accessories
  - True
WORLD AC POWER"

   as it will work on both 50 or 60 Hz AC and voltages from 110-240 Volts AC


Sansui QRX-6500 Original Specs:

 POWER / PRE AMP SPECIFICATIONS:
THD;
0.5% @ full rated power @ 1kHz.
Power bandwidth of power amp section; 20-30,000Hz 0dB
 IMD utilizing AUX;
 0.5% @ full rated power / 20-20kHz and 8 Ohms
 Damping factor; 30 @ 8Ω full bandwidth
Dynamic (music) rated Power: 2 x 190 Watts @ 8 Ohms or 280 Watts @ 4 Ohms
Cont rated Power:

4x 33 Watts @ 8 Ohms / 1kHz (ALL channels driven w/ 1kHz input)
4x 37 Watts @ 8 Ohms / 1kHz (each channel driven w/ 1kHz input)

4x 60 Watts @ 4 Ohms / 1kHz (each channel driven w/ 1kHz input)

Hum and Noise; >70dB on AUX / Tape
Input Sensitivity AUX / Tape; 150mV @ 50kΩ
Record Out Levels; 150mV
Bass Control;  15dB @ 50hz (most amp tone controls are only +/- 10dB)
Treble Control;  15dB @ 20khz (most amp tone controls are only +/- 10dB)
Low Filter;  -10dB @ 50Hz @ 6dB Oct
High Filter;  -10dB @ 10kHz @ 6dB Oct
"Loudness" Contour;  +8dB @ 50hz, +3dB @ 10khz (w/ volume set at -30dB)

TUNER SPECS FOR FM:
Tuning Range;
88-108MHz
Freq Response;
30-15kHz (limited by FCC)
S/N; > 65db Stereo w/ 1mV input
Mono Sensitivity; 1.8 μV
Capture Ratio; 1.5dB
IF Rejection; >100dB
Image Rejection; >100dB
Spurious Noise Ratio; >100dB
Selectivity; >70dB
THD w/ 100% modulation Mono; 0.5%
THD w/ 100% modulation Stereo; 0.8%
Stereo Separation; >35dB

TUNER SPECS FOR AM:
Tuning Range;
535-1605kHz
Useable Sensitivity; 50db/m with ferrite stick antenna
Image Rejection; >100dB
IF Rejection; >100dB
Selectivity; 30dB

PHONO SECTION SPECS:
Freq Response;
30-15kHz RIAA Standard Curve +/- 1dB.

S/N;
>60 dB
Input Sensitivity;
2.5 mV @ 50kΩ
Overload limit;
150mV w/ 0.5% THD @ 1kHz

 Power consumption;
150 Watts at rated
  

Again, as stated before, we have completely gone through this SANSUI QRX-6500 Quad receiver, cleaning and testing all and it gets our full
'Certification'. Everything is in fabulous electrical and cosmetic condition! Looks near new and sounds great! AMAZING looking when lit up at night or in a darkened room! Again, this unit is a 'blast' to use. It just simply 'feels nice'!
Comes with an 'e-copy / PDF download of the SANSUI QRX-6500 owners / users / service manual, and brochure if the purchaser desires. Measures 21.2" wide x 7.25" tall x 14.5" deep and weighs an impressive 49 lbs unpacked. Includes our standard 90 day limited warranty.
SANSUI QRX-6500 STEREO RECEIVER
Cond. 8.5+++

SOLD 7/28/2020
SHIPPING TO GREG IN LAS VEGAS

(Above text, in it's entirety, property of www.oaktreevintage.com / Oak Tree Enterprises, LLC. See 'Copyright Information' page for details)
 
 


 

 

  

 

    

           NEW LISTING 4/8/2020
(click on above thumbnails to enlarge photos)
CheckMarkSmall_web.jpg (792 bytes) warranty
RESTORED / REFURBISHED / FULLY SERVICED / WARRANTED
VINTAGE SANSUI STEREO RECEIVER
SANSUI EIGHT / 8 RECEIVER
#...0198
Circa 1973-75
"WORLD AC POWER"
 M.I.J.
9/14/2020
SHIPPING TO DOUG IN HAWAII


 Our technician has completely gone through and 'Certified' this unit.

 We have completely gone through this unit cleaning everything including all switches, controls and contacts. Extensive cleaning of unit internally.

 Internal fuses checked for continuity and correct values. No issues found, fortunately. We don't like seeing incorrect fuses having been installed in a unit as that could mean it had prior issues, or if a fuse value was 'increased' it could have allowed too much current through an 'ailing' circuit causing un-due / un-necessary damage.

 Controls were 'flooded' w/ 'De-OxId' and are quiet

 Tuner string checked for any fraying then re-tensioned to increase traction & relieve flywheel binding and re-centered pointer to correct dial position. As the "Eight" utilizes a complicated 'gear box' that the tuning knob is actually connected to, it feels and operates different than most (occasionally feels like it's 'slipping' but it's not. Seems to slow down when it reaches a station). Not sure what the reason for the "gear box" is for, but that's how it's made)

 We aligned the tuner front-end for optimum AM & FM performance as older internal tuner components have always drifted on vintage gear over the years. VERY GOOD TUNER! AM seems to be an 'afterthought' on many stereo receivers and component tuners. The AM is above average for a 'stereo receiver' on this SANSUI Eight / 8. 

 ALL lamps / bulbs replaced; dial, Stereo indicator, Aux, 'FM', 'Phono-1', Phono-2, Tape, & meter lamps 'proactively' replaced trouble-free service!!!

 Amplifier section had output bias adjusted to spec levels.

 NOW both amplifiers have 'even' clipping on 'plus' and 'minus' rails.

 All inputs tested and both side produces clean and even sine waves into 'brick-wall' 8 & 4 Ohm loads! No power supply hum of any kind. It's dead silent! All functions test fine.
Total restoration time investment 18 hours
.

 Following restoration procedures, the unit was run continuously at medium volume, as all our amplifier / receivers are, into a load with "Loudness" on and both Tone Controls at 10 for 72 hours into a 4 Ohm load.
 
 On our test bench, this particular Eight / 8, #...0198, amplifiers each produced 23 Volts per channel for 66 Watts per channel @ 8Ω via discrete output & 19 Volts per channel for 90 Watts per channel @ 4Ω w/ 1kHz in single channel driven mode via discrete, Metal cased, TO-3 outputs (4x Toshiba 2SC1079).
 AC draw at idle .2A tested.
 DC Offset adjusted and measured down to <55mVDC either channel
 Floor noise measured at >60dBm / 0.1mVAC

 Following restoration procedures, real, walnut wood, veneer case / bonnet rubbed with Howards "Restore-a-Finish", then "Feed-n-Wax". Looks fabulous. Essentially NEW.
 ___________________________

 

VERY IMPRESSIVE looking, Sansui, brushed silver, Stereo receiver, surrounded by handsome, real Walnut wood veneer side plates. Features gorgeous, back-lit slide rule analog tuning scale with matching VU meters as well. VERY elegant and IMPRESSIVE unit when lit in a darkened room. 'Heavy' built, machined aluminum knobs (all with two set screws) and button caps, also make this unit a pleasure to 'feel'.
 Incredible internal build quality as well. One of the most impressive internal builds of any unit we've seen (think Pioneer SA-8100 and SA-9100).
 This receiver has a very 'musical' pre-amp and power amp. Lot's of punch, headroom and just great 'tone'. Here's a link to a informative page on this model;
https://bb3blog.wordpress.com/2015/01/10/the-sansui-eight-receiver/

Sansui Eight / 8 Features include
:
  

- Serious internal build quality
- Tone Controls are not your typical 'potentiometers'. They are 'wafer switches' utilizing 'fixed resistors' in 3dB increments, thus no 'carbon trace' to need contact cleaner or to wear out!
- Discrete, TO-3, Metal cased output transistors
- Weighted flywheel analog tuning (with added 'gear box' mechanism)
- Dual, separate AM and FM variable capacitors
- Fully shielded FM discriminator circuit board
- Fully shielded amp driver circuit board

- A, B, C, Off or A+B or A+C speaker positions ("C" position used with 'external / electronic' crossovers and separates power amp from "A" speakers. Complicated and you'll likely never use it)
- 3-Band EQ via Separate Midrange and Treble controls
- "Balance Check Switch & Meter". This is an interesting function that allows you to use the 'Tuning Centering' meter to exactly center the power amp output between L & R (the balance control in it's 'centered / 12 O'Clock' position is not necessarily or even generally centered from an 'output' standpoint)
- Stereo / Mono selector (separate from 'FM Muting' selector and overall preamp)
- Stereo 'Reverse' selector (very handy for trouble-shooting speakers and system)
 - Built-in Hi and Sub filters (separately switchable Front and Rear) for reducing 19kHz pilot tone in FM broadcasts, Tape Hiss and the Sub filter for reducing turntable rumble / 'howling'
- FM Stereo / Mono (separate from 'FM Muting' selector and overall Stereo / Mono for preamp)
- Adjustable Level FM muting
(separate from 'Stereo' selector) (adjustment on rear panel)
- Adjustable Output Level FM & AM allowing 'volume level matching' of other input devices via AUX, Tape or Phono
- Aux input (may also be used for Video / CD / DVD /DAT / VCR / MP3 / iPod / iPad / iPhone / iTouch / i-gadget / MP3 / XM / SIRUS, external mixing board, etc.)

- Dual tape monitors with Tape monitor A also featuring a DIN input as well as the standard RCA I/O's for both Front and Rear
  (Tape Monitors can be used with Tape decks such as Cassette Tape Recorders/ Players, Reel to Reel's, 8-Track Tape Cartridge Decks, Video / CD / DVD / VCR / DAT / MP3 / iPod / iPad / iPhone / iTouch / i-gadget / MP3 / XM / SIRUS CDR (CD recorders as well as for inserting signal processors, such as EQ's, Reverbs, Spatial Enhancers / Dynamic Processors, Noise Reduction units, Special Effects units, Time Delays, etc)
- Dual Phono / Turntable inputs with Built-In Phono Pre-Amps
Pre-Amp Out / Power-Amp In Loop
- Front 1/4" stereo headphone jack
- Dual Tuning DArsonval meters for tuning and signal strength
- Rear located, full barrier strip for external antenna connections
- Rear located Speaker Output protection fuses
- Rear located main AC protection fuse
- Dual AC convenience outlets on rear panel with 1 switched and 1 un-switched for a total capacity of 200 Watts of accessories
  - True
WORLD AC POWER"

   as it will work on both 50 or 60 Hz AC and voltages from 110-240 Volts AC


Sansui Eight / 8 Original Specs:

POWER / PRE AMP SPECIFICATIONS:
THD;
<0.2% @ full rated power @ 1kHz.
Power bandwidth of power amp section; 5Hz-40,000Hz 0dB
 IMD utilizing AUX; <0.3% @ full rated power
Damping factor; 60 @ 8Ω full bandwidth
Dynamic (music) rated Power: 2 x 160 Watts @ 8 Ohms or 200 Watts @ 4 Ohms
Cont rated Power:

2x 50 Watts @ 8 Ohms (Both channels driven 20Hz-20,000Hz)
2x 55 Watts @ 8 Ohms / 1kHz (Both channels driven w/ 1kHz input)
4x 60 Watts @ 8 Ohms / 1kHz (each channel driven w/ 1kHz input)

4x 80 Watts @ 4 Ohms / 1kHz (each channel driven w/ 1kHz input)
Channel Separation; >60dB on Power Amp
Hum and Noise; >80dB on AUX / Tape
Input Sensitivity AUX / Tape @ 1kHz for rated output; 100mV @ 50kΩ
Record Out Levels; 100mV
Bass Control;  15dB @ 50hz (3dB steps)
Midrange Control;  15dB @ 1khz (1dB steps)
Treble Control;  15dB @ 15khz (3dB steps)
Low Filter;  -10dB @ 50Hz @ 12dB Oct (steep filter)
High Filter;  -10dB @ 15kHz @ 12dB Oct (steep filter)
"Loudness" Contour;  +10dB @ 50hz, +8dB @ 10khz (w/ volume set at -30dB)

TUNER SPECS FOR FM:
Tuning Range;
88-108MHz
Freq Response;
30-12kHz (limited to 15kHz by FCC)
S/N; > 65db Stereo w/ 1mV input
Mono Sensitivity; 1.7 μV
Capture Ratio; 1.5dB
IF Rejection; >100dB @ 98MHz
Image Rejection; >100dB @ 98MHz
Spurious Noise Ratio; >100dB @ 98MHz
Selectivity; >80dB
THD w/ 100% modulation Mono; 0.3%
THD w/ 100% modulation Stereo; 0.5%
Stereo Separation; >35dB @ 400Hz

TUNER SPECS FOR AM:
Tuning Range;
535-1605kHz
Useable Sensitivity; 48db/m with ferrite stick antenna
Image Rejection; >100dB/m @ 1kHz
IF Rejection; >100dB/m @ 1kHz
Selectivity; 30dB @ 1kHz

PHONO SECTION SPECS:
Freq Response;
30-15kHz RIAA Standard Curve +/- 1dB.

S/N;
>50 dB
Input Sensitivity Phono-1;
2.5 mV @ 50kΩ
Input Sensitivity Phono-2;
2.5 mV @ 30kΩ
Overload limit;
300mV w/ 0.2% THD @ 1kHz

 Power consumption;
140 Watts
  

Again, as stated before, we have completely gone through this SANSUI
Eight / 8  Stereo Receiver, cleaning and testing all and it gets our full 'Certification'. Everything is in fabulous electrical and cosmetic condition! Only cosmetic issues worth mentioning are a few dings on the wood case, mostly on the rear, side edges and a slight ding to the 'Tape-Mon' button (see photos above).  Looks NEAR NEW and sounds great! Great looking when lit up at night or in a darkened room! Again, this unit is a 'blast' to use.
So if you read and understand the above mentioned specifications, some that stand out are, "Damping Factor" of >60!, Bass and Treble Controls that are 15dB instead of the typical 10dB (that's 50% more range!), 'Fixed Resistor' tone controls instead of typical carbon trace pots (that's a huge deal from a quality and longevity standpoint), 300mV phono overload limit still with a decent THD rating, >80dB overall S/N, FM "Stereo Selectivity" >80dB.
Comes with an 'e-copy / PDF download of the SANSUI Eight / 8 Owners manual. Measures 17.6" wide x 5.5" tall x 13" deep and weighs an impressive 36 lbs unpacked. Includes our standard 90 day limited warranty.
SANSUI Eight / 8 STEREO RECEIVER
Cond. 8.5+++

9/14/2020
SHIPPING TO DOUG IN HAWAII

(Above text, in it's entirety, property of www.oaktreevintage.com / Oak Tree Enterprises, LLC. See 'Copyright Information' page for details)
 
 


 


 

    



       NEW LISTING
6/21/19
(click on above thumbnails to enlarge photos)
CheckMarkSmall_web.jpg (792 bytes) warranty
RESTORED / REFURBISHED / FULLY SERVICED / WARRANTED
VINTAGE SANSUI STEREO QUADRAPHONIC / 4-CHANNEL / 2-CHANNEL STEREO RECEIVER

SANSUI QR-4500 RECEIVER
#...0983
Circa 1973-75
"WORLD AC POWER"
M.I.J.
SOLD 9/3/2020
SHIPPING TO MICHAEL IN IDAHO


 Our technician has completely gone through and 'Certified' this unit.

 We have completely gone through this unit cleaning everything including all switches, controls and contacts. Extensive cleaning of unit internally.

 Internal fuses checked for continuity and correct values. No issues found, fortunately. We don't like seeing incorrect fuses having been installed in a unit as that could mean it had prior issues, or if a fuse value was 'increased' it could have allowed too much current through an 'ailing' circuit causing un-due / un-necessary damage.

 Controls were 'flooded' w/ 'De-OxId' and are quiet

 Tuner string checked for any fraying then re-tensioned to increase traction & relieve flywheel binding and re-centered pointer to correct dial position.

 We aligned the tuner front-end for optimum AM & FM performance as older internal tuner components have always drifted on vintage gear over the years. VERY GOOD TUNER! AM seems to be an 'afterthought' on many stereo receivers and component tuners. The AM is above average for a 'stereo receiver' on this SANSUI QR-4500. 

 All dial, indicator & meter lamps checked. Dial and meter lamps replaced w/ original spec 6.3V / 250mA.

 We also checked the heat sink compound which should be good for another 30 years.

 Driver boards removed and had their 'edge connectors' burnished.

 Amplifier section had output bias adjusted to service manual spec levels of on all four amplifiers.

 NOW all 4 amplifiers have 'even' clipping on 'plus' and 'minus' rails.

 DC offset adjusted to VERY LOW levels on all four amplifiers.

 All inputs tested and both side produces clean and even sine waves into 'brick-wall' 8 & 4 Ohm loads! No power supply hum of any kind. It's dead silent! All functions test fine.
Total restoration time investment 12+ hours.

 Following restoration procedures, the unit was run continuously at medium volume, as all our amplifier / receivers are, into a load with "Loudness" on and both Tone Controls at 10 for 72 hours into a 4 Ohm load.
 
 On our test bench, this particular QR-4500, #...0983, 'FRONT and REAR' amplifiers each produced 15.5 Volts per channel for 30 Watts (160 WPC peak) per channel @ 8Ω via discrete output & 13Volts per channel for 42 Watts (240 WPC peak) per channel @ 4Ω via discrete, Metal cased, TO-3 outputs.
 AC draw at idle .3A tested. DC 10-15mV any single channel.
 Floor noise measured at >-60dBm / 0.1mVAC
 ___________________________

 
HUGE and VERY IMPRESSIVE looking, Sansui, brushed silver, QUAD receiver, surrounded by handsome, real Walnut wood veneer side plates. This unit has about THE highest 'KPD-Factor' of any we've had in a long time. What's a 'KPD Factor'? You'll find out when you call to order it.
Features gorgeous, back-lit slide rule analog tuning scale with matching VU meters as well. VERY elegant and IMPRESSIVE unit when lit in a darkened room. 'Heavy' built, machined aluminum knobs and button caps, also make this unit a pleasure to 'feel'. One of the most 'fun' receivers I've used in a long time.

Regarding some of the 'Quad' aspects, from the original Sansui QR-4500 brochure,
"It's exclusive, built-in, 2-4 Synthesizer Encoder helps the QS regular matrix system convert all of your 2-channel / stereo records, tapes and FM stereo broadcasts into more exciting 4-channel sound than ever.  It has 'Phase Matrix' circuitry that takes advantage of Sansui's exclusive front-rear logic to decode all SQ system records too, with superb front-rear separation...And for even greater versatility, the unit comes complete with an extra set of discrete 4-channel inputs, permitting you to connect a 'demodulator' to play "discrete" records".

Sansui QR-4500 Features include:
  

- Quadraphonic (sometimes spelled "quadriphonic" or "quadrophonic") / Stereo receiver 
- Weighted flywheel analog tuning
- A, B, Off or A+B Front and Rear speaker positions (separately)
- Separate Bass and Treble controls (front speakers)
- Balance controls allow complete blending between Front and Rear / Left and Right
 - Built-in Hi and Sub filters (separately switchable Front and Rear) for reducing 19kHz pilot tone in FM broadcasts, Tape Hiss and the Sub filter for reducing turntable rumble
- FM muting to reduce 'hiss' in between stations (most handy for trouble-shooting speakers / drivers and system overall)
- ''Function Control' selector for 2-Channel Stereo, & 4-Channel modes of ''QS Synthesizer' (To convert (synthesize) conventional, 2-channel / stereo program sources to 4-Channel stereo output), 'QS Regular Matrix' (to decode and reproduce 4-channel program sources (records, tapes and their respective broadcasts),  ''Phase Matrix' (to decode and reproduce 4-channel program sources, encoded with the CBS / SQ matrix system) or 'CD-4 / Discrete' (when wishing to hear discrete 4-channel tapes or CD-4 (Quadradisc) records).
- Dual Aux inputs for both Front and Rear (may also be used for Video / CD / DVD /DAT / VCR / MP3 / iPod / iPad / iPhone / iTouch / i-gadget / MP3 / XM / SIRUS  etc.)

- Dual tape monitors with Tape monitor A also featuring a DIN input as well as the standard RCA I/O's for both Front and Rear
  (Tape Monitors can be used with Tape decks such as Cassette Tape Recorders/ Players, Reel to Reel's, 8-Track Tape Cartridge Decks, Video / CD / DVD / VCR / DAT / MP3 / iPod / iPad / iPhone / iTouch / i-gadget / MP3 / XM / SIRUS CDR (CD recorders as well as for inserting signal processors, such as EQ's, Reverbs, Spatial Enhancers / Dynamic Processors, Noise Reduction units, Special Effects units, Time Delays, etc)
-  Dual Phono / Turntable inputs with Built-In Phono Pre-Amp, featuring 'Phono-2' compatible with 'CD-4' cartridges
- Loudness control for increasing 'rock-n-roll smile' tone curve at lower volumes
- Pre-Out / Power-Amp In loops on rear panel for all amps
- Front and Rear 1/4" stereo headphone jacks for connection of either 'stereo' headphones, or 'quadraphonic / 4-channel' headphones
- Tuning DArsonval meters for signal strength
 - Front mounted Dual 1/4" stereo headphone jacks
 - 4 Externally mounted speaker protection fuses on rear panel
 - 4 Separate sets of speaker output connectors on rear panel

 - AM Local / Distant selector on rear panel

- Rear located, full barrier strip for external antenna connections

 - Built-in AM Ferrite Stick antenna

- Rear located main AC protection fuse
- Triple AC convenience outlets on rear panel with 1 switched and 2 un-switched for a total capacity of 350 Watts of accessories
  - True
WORLD AC POWER"

   as it will work on both 50 or 60 Hz AC and voltages from 110-240 Volts AC


Sansui QR-4500 Original Specs:

 POWER / PRE AMP SPECIFICATIONS:
THD;
0.5% @ full rated power
Freq Response of power amp section; 30-30kHz @ 1W
Power bandwidth of power amp section; 20-30,000Hz 0dB
 IMD utilizing AUX;
<0.5% @ full rated power / 20-20kHz and 8 Ohms
Damping factor; >30 @ 8Ω full bandwidth
Dynamic rated Power: 2 x 160 Watts @ 8 Ohms or 240 Watts @ 4 Ohms
Cont rated Power:
4x 38 Watts @ 8 Ohms / 1kHz (each channel driven)
4x 38 Watts @ 4 Ohms / 1kHz (each channel driven)
4x 23 WPC @ 8 Ohms / 1kHz (ALL channels driven)

Hum and Noise; >70dB on AUX / Tape
Channel Separation; >45dB @ 1kHz @ rated output
Input Sensitivity AUX / Tape; 150mV @ 50kΩ
Record Out Levels; 150mV
Bass Control;  15dB @ 50hz (most amp tone controls are only +/- 10dB)
Treble Control;  15dB @ 20khz (most amp tone controls are only +/- 10dB)
Low Filter;  -10dB @ 50Hz @ 6dB Oct
High Filter;  -10dB @ 10kHz @ 6dB Oct
"Loudness" Contour;  +8dB @ 50hz, +3dB @ 10khz (w/ volume set at -30dB)
Synthesizer / DecoderSansui 'New QS' circuit / Vario-Matrix


TUNER SPECS FOR FM:
Tuning Range;
88-108MHz
Freq Response;
30-15kHz (limited by FCC)
S/N; > 65db Stereo w/ 1mV input
Mono Sensitivity; 2.0 μV
Capture Ratio; 1.5dB
IF Rejection; >80dB
Image Rejection; >80dB
Spurious Noise Ratio; >90dB
Selectivity; >50dB
THD w/ 100% modulation Mono; 0.5%
THD w/ 100% modulation Stereo; 0.8%
Stereo Separation; >35dB

TUNER SPECS FOR AM:
Tuning Range;
535-1605kHz
Useable Sensitivity; 50db/m with ferrite stick antenna
Image Rejection; >100dB
IF Rejection; >100dB
Selectivity; >30dB

PHONO SECTION SPECS:
Freq Response;
30-15kHz RIAA Standard Curve +/- 1.5dB.

S/N;
>60 dB
Input Sensitivity;
2.5 mV @ 50kΩ
 Overload limit;
150mV w/ 0.5% THD @ 1kHz
  

Again, as stated before, we have completely gone through this Sansui QR-4500 Quad receiver, cleaning and testing all and it gets our full
'Certification'.
Built using super quality, full size, ALPS brand pots. Everything is in fabulous electrical and cosmetic condition! Looks near new and sounds great! AMAZING looking when lit up at night or in a darkened room! Again, this unit is a 'blast' to use. It just simply 'feels nice'!
INCLUDES ORIGINAL BOX & PACKING!!!
Comes with an 'e-copy / PDF download of the Sansui QR-4500 owners / users manual, and the service manual if the purchaser desires. Measures 20.75" wide x 6.75" tall x 12.5" deep and weighs an impressive 41 lbs unpacked. Includes our standard 90 day limited warranty.
SANSUI QR-4500 STEREO RECEIVER
Cond. 9+++

SOLD 9/3/2020
SHIPPING TO MICHAEL IN IDAHO

(Cons. R.R.)

(Above text, in it's entirety, property of www.oaktreevintage.com / Oak Tree Enterprises, LLC. See 'Copyright Information' page for details)
 
 

 

 

 

    

    

NEW LISTING 10/30/20
(click on above thumbnails to enlarge photos)
CheckMarkSmall_web.jpg (792 bytes) warranty
RESTORED / REFURBISHED / FULLY SERVICED
VINTAGE MARANTZ STEREO RECEIVER
MARANTZ 2250
 #...1178
 Circa 1976-77
 Classic 'Blue Face'
 MIJ

SOLD 10/31/20
SHIPPING TO BOB IN TENNESSEE


 Our technician has completely gone through and 'Certified' this unit.

 We have completely gone through this unit cleaning everything including all switches, controls and contacts. Extensive cleaning of unit internally.

 Internal fuses checked for continuity and correct values. No issues found, fortunately. We don't like seeing incorrect fuses having been installed in a unit as that could mean it had prior issues, or if a fuse value was 'increased' it could have allowed too much current through an 'ailing' circuit causing un-due / un-necessary damage.

 Power switch replaced with #26-855 as well as 'clamping' capacitor

 Broken 'Dolby' switch repaired and replacement knob sources

Controls were 'flooded' w/ 'De-OxId' and are quiet

Internal Power supply circuit adjusted to correct 35V output and checked for 'ripple' w/ O-Scope

DC Offset adjusted on both R&L to 0mV+/-0.4mV!

Bias adjusted to correct 8mVDC

 We aligned the tuner front-end for optimum AM & FM performance as older internal tuner components have always drifted on vintage gear over the years.

 Tuner string checked for any fraying then re-tensioned on Gyro-Wheel to increase traction & relieve flywheel binding and re-centered pointer to correct dial position (after proper tuner, front-end alignment).

 All dial, indicator & meter lamps 'proactively' replaced (5x Dial & 2x Meter 8V/200mA, 1x Pointer lamp #25-160)

 We also checked the heat sink compound which should be good for decades.

 Missing original buttons / knobs replaced from proper donor units as necessary (6 in total)

 Missing original feet replaced from proper donor units as necessary (all four)

 All inputs tested and both side produces clean and even sine waves into 'brick-wall' 8 & 4 Ohm loads! No power supply hum of any kind. It's dead silent! All functions test fine.

 Following restoration procedures, the unit was run continuously at medium volume, as all our amplifier / receivers are, into a load with "Loudness" on and both Tone Controls at 10 for 72 hours into a 4 Ohm load.

 Full Cosmetic detail inside and out

Cosmetically the unit is in overall nice shape. There's just a couple of minor scuffs / smudges above the dial window and a 'hairline' scratch on the dial window (see photos above). The balance of the face, knobs and case look good!

On our test bench, this particular Marantz 2250, #...1178 amplifiers each produced 22 Volts per channel for 60 Watts per channel @ 8 Ω via discrete output & 20 Volts per channel for 100 Watts per channel @ 8Ω via discrete, "MARANTZ" branded (originals) TO3 Metal Cased outputs (4x 2SC1343)
AC Idle current at 350mA, DC offset output adjusted to <1mVDC either channel. Bias correctly adjusted to 8mVDC across emitters. Floor noise measured at >-60dBm w/ AUX shorted.)
   ___________________________

   

Classic 'Blue Face' Marantz, 2250 stereo receiver. Elegant looking Face is milled from a solid plank of Aluminum with matching milled aluminum controls. This unit looks great!

Marantz 2250 Features include:
  

- Marantz exclusive "Gyro-Touch" weighted flywheel analog 'Slide Rule' tuning w/ ''PLL' (Phase Locked Loop) circuitry
- A-B, A+B or Off speaker selector
- Separate 'LEFT AND RIGHT' Bass, Mid and Treble utilizing high quality 'Alps' brand pots
- Tone Defeat for purest signal path (if desired)
- Tone centers selectable for either 100 Hz to 250Hz and 1kHz to 4kHz

- 'Pre-Out' / 'Main-In' loop
 - Built-in Hi filter for reducing 19kHz pilot tone and 38kHz Harmonic in FM broadcasts & Tape hiss.
  - Built-in 'Low' Filter to eliminate excess rumble from sources such as turntables
  - FM muting, separate from FM stereo selector and has adjustable level (on rear panel)
 - Stereo / Mono mode selector for Pre-Amp section or FM tuner (depending on function selected)
- "Loudness" function to boost Bass and Treble in relationship to Mid frequencies at lower volume levels for a much fuller sound
 - Phono / turntable  input
- Aux input (may also be used for Video / CD / DVD /DAT / VCR / MP3 / iPod / iPhone / iTouch / iGadget / MP3 / XM / SIRUS  etc.)
- Real 'Tape Monitor Loop' and second 'Tape Input'
  (Tape Monitors can be used with Video / CD / DVD / VCR / DAT / MP3 / iPod / iPhone / iTouch / iGadget / MP3 / XM / SIRUS CDR (CD recorders as well as for inserting signal processors, such as EQ's, Reverbs, Spatial Enhancers / Dynamic Processors, Noise Reduction units, Special Effects units, Time Delays, etc)
- Analog VU 'Tuning' & 'Signal Strength' meter
- Dolby FM selector (Broadcasts aren't in Dolby anymore, but if desired, it still does 'Brighten' up your FM sound. I tend to use it when it's an option on tuners)
- Fully shielded tuning capacitor
- Built-In AM 'Stick' antenna
- Antenna attenuator
- 'Quadradial' RCA tuner output (not of much use today)
- 1/4" Stereo Headphone Jack
 - Externally located protection line fuse and additional internal protection fuse bank
- Separated L & R output heat sink sections featuring large, vertically finned heat sinks
 - Dual AC convenience outlets on rear panel with 1 switched and 1 un-switched for a total capacity of 300 Watts of accessories

  
 Marantz 2250 Stereo Receiver Original Specs:
   "The Marantz 2245 has a continuous power output of 50 Watts per channel @ 8 from 20 hertz to 20,000 hertz with no more than 0.3% THD (measured utilizing AUX input)"
Comparable 'Music' power = 135 Watts
  
POWER / PRE AMP SPECIFICATIONS:
THD:
<
0.3% @ 8Ω @ full rated power
Freq Response of power amp section;
 @ full rated power 20-20kHz
Dynamic Range;
96dB
IMD utilizing AUX;
0.25% @
Damping factor: >55 @ 8Ω full bandwidth (FYI; twice the damping factor of it's 'little brother' the 2220)
 Input Sensitivity: 180mV for output of 50 Watts @ 8 Ohms
Main Power-Amp in: 1.5V for output of 50 Watts @ 8 Ohms
Input Impedance AUX or Tape: 100k Ohms
S/N AUX:
85dB
Record Out Levels; 180mV
Bass Control;  10dB @ 100hz
Mid Control;  7.5dB @ 700hz
Treble Control;  10dB @ 10khz
Low Filter; 100Hz @ 6dB Oct
High Filter;  7kHz @ 6dB Oct
"Loudness" Contour;  +9dB @ 50hz, +8dB @ 10khz (w/ volume set at -30dB)
 
TUNER SPECS FOR FM:
Freq Response:
30-15kHz
Useable Mono RF Sensitivity: 2.5 μV
Capture Ratio: 1.5dB
THD w/ 100% modulation @ 400Hz, Mono:  0.2%
Spurrious Rejection: 95dB
Image Rejection: 70dB
IF Rejection: 90dB
Selectivity60dB
AM Supression55dB
 
 PHONO SECTION SPECS:
Input Sensitivity:
1.8 mV @ 47kΩ
Dynamic Range: 98dB!!!
S/N Phono: 75
dB!!! (typical would be about 68dB)
Overload:
100mV
 
 
 Again, as stated before, we have completely gone through this Marantz 2250 Stereo Receiver cleaning and testing all and it gets our full
certification. Brushed aluminum face and all original, milled knobs in fabulous shape. After restoration, receiver looks, performs and sounds great! This is a VERY 'Musical' sounding tuner/pre/power-amp. Very 'full, warm and phat'. Great 'low-end' depth at any volume. Tone controls have a lot of influence. Overall a pleasing unit to listen to in all aspects. Measures 17.5" wide x 14" deep x 5.5" high and weighs 35 lbs unpacked. Includes our standard 90 day limited warranty!
MARANTZ 2250 STEREO RECEIVER
Cond. 8.5

SOLD 10/31/20
SHIPPING TO BOB IN TENNESSEE

(CONS. R.R.)


(Above text, in it's entirety, property of www.oaktreevintage.com / Oak Tree Enterprises, LLC. See 'Copyright Information' page for details)

 

 
   

     

 


          NEW LISTING 11/30/11
(Click on above thumbnails to enlarge photos)

CheckMarkSmall_web.jpg (792 bytes)  warranty
NEW
AUDIO-TECHINCA
STEREO HOME AUDIO / PRO TURNTABLE
MODEL AT-LP120USB
DIRECT DRIVE
FULLY MANUAL RETURN
WITH A GREAT DIAMOND CARTRIDGE NOW INCLUDED
NEW
for sale
One of the few 'QUALITY' turntables available under a $GRAND these days! The Audio-Technica AT-LP120 stereo turntable. Similar in design to some of the vintage turntable models, such as the Kenwood KD-550 'concrete base', the Sony PS-T1, and the Technics SL-1500, SL-1700MK2 or SL-D2 turntable models. This professional stereo turntable features a high-torque, direct-drive motor for quick start-ups yet is perfectly quiet. Classic 'S' shaped tone arm with 'universal' head-shell that allows mounting of most any 'quality', 1/2' cartridge, either MM (moving magnet) or MC (moving coil). Tone-arm mounted in high quality 4-point, Gimbol bearing.
NEW UPDATE--- Now having the table shipped with a much better cartridge than previously. It's now using one of our favorite 'all around' cartridge the AT-95E, instead of the 'clunkier' AT-2N (that cartridge liked to track at an incredibly heavy 3.5 Grams!!! Yuck...) Click here for further info on the cartridge.

NEW UPDATE--- We're now including the Audio-Technica AT-95E, MM, Elliptically cut diamond cartridge with tables purchased from us at Oak Tree Vintage.

Overall Table has good mass at over 20 lbs!

Features:

- Direct drive high-torque motor
- Fully-Manual operation
- Selectable 33/45/78 RPM speeds (you will need to acquire a stylus / cartridge designed for playing '78 RPM' records to utilize that feature to it's fullest)
- Professional weight cast aluminum platter with slip mat (no PLASTIC platters here, unlike many of the NEW tables out there!)
- -inch mount universal head shell
- Quartz Locked speed
or
- Strobe monitored, adjustable platter speed
- Adjustable tone-arm counter weight
- Adjustable 'Anti-Skating' control
- 500,000 Silicon oil fluid hydraulic tone-arm cueing
- Internal Built-in Phono Pre-Amp of decent quality so if you MUST use this with some sort of 'home-theater-surround-sound-5.1, 7.2, or 8.BR549 receiver' that the manufacturer forgot to include the phono pre-amp on. If you have a 'REAL receiver', ie, an old-school, vintage, 2-channel receiver or integrated amp or pre-amp with a phono pre built-in, then you can flip a switch and bypass the 'built-in' phono preamp.
- USB outputconnects directly to your computer for plug-&-play use
- Forward or reverse play (this is a DJ feature, and if you value your vinyl or cartridge, DON'T USE 'Reverse'! If you have a crappy cartridge and are playing 'Frisbees', then 'go for it' if you're so inclined!
-
*Comes with Mac- and PC-compatible Audacity software and cables to digitize your LPs
If you appreciate the 'organic' sound of quality vinyl, then disregard the above stuff 'USB / SOFTWARE STUFF' and just 'LISTEN' to your vinyl the way it was meant.


SPECIFICATIONS:

Type:
3-speed, fully manual operation
Motor:
High-Torque, 16 pole, DC motor
Drive System:
Direct drive
Speeds:
33-1/3, 45, & 78 RPM
Pitch Variation:
Adjustable in ranges of +/-10% or +/-20%
Turntable Platter:
Die-cast aluminum
Starting Torque:
>1.6 kgf-cm
Braking System:
Electronic brake
Wow and Flutter:
>0.2% WRMS (33 RPM)
Signal-to-Noise Ratio:
>50 dB
Output Level Pre-amp "PHONO":
2.5 mV nominal at 1 kHz, 5 cm/sec
Pre-amp "LINE":
150 mV nominal at 1 kHz, 5 cm/sec
Phono Pre-Amp Gain:
36 dB nominal, RIAA equalized
USB Function:
A/D, D/A- 16 bit 44.1 kHz or 48 kHz USB selectable
Computer interface:
USB 1.1 Compliant Windows XP, Vista or MAC OSX
Power Supply Requirements:
115/230V AC, 60/50 Hz


Includes :

Software included: Mac- and PC-compatible Audacity software
Accessories Included: 'Universal' Head shell w/ pre-mounted AT-95E 'Green' 1/2" mount, Elliptically cut diamond tipped, MM cartridge, AC line cord, Included cables connect to your stereo or powered speakers, ie: Dual RCA (female) to 3.5 mm (1/8") mini-plug (male) stereo adapter cable, Dual RCA (female) to 3.5 mm (1/8") mini-plug (female) stereo adapter cable, 45 RPM adapter, USB cable & above mentioned recording software (Adapter cables for standard analog RCA inputs, as well as the 3.5mm TRS on computer sound cards.)
*System requirements (if you're planning on using the table to transfer and burn your LP's / albums, records to CD ROM or your computer hard drive or some other MP3 format):
PC or Mac with an available USB port (USB1.1 or higher),
CD-R or CD-RW writer for burning CDs & installation,
Includes Audacity software for PC & Mac users
(Audacity requires Mac running OS X 10.1 or later or PC running Windows (98 and above))


Again, we are having these tables shipped with the much better sounding AT-95E cartridge than the '3-GRAM TRACKING' AT-2N cartridge.
Comes with the Audio-Technicas 1 Year limited warranty handled through the AT. See Audio-Technica AT-LP120USB turntable owners manual or AT's web site for further details.
Dimensions w 17.72" x d 13.86" x 6.1" H and weighs 23.5 lbs.
AUDIO-TECHNICA AT-LP120USB TURNTABLE
Cond.- NEW
$349.99
and when purchased from Oak Tree Vintage also includes *AT-95E CARTRIDGE!


w/ MM, Elliptically Cut Diamond stylus cartridge, Dust Cover and all above mentioned cables and software.


*Turntable shipped directly from AT and the Cartridge will be shipped from us at Oak Tree Enterprises, LLC. Once products arrive, please call us for assistance with re-balancing tone arm and setting the 'Anti-Skate' adjustment.


(OK, do I really need to say it?... No, the laptop shown in the photos is NOT included.)
 

 

 

    

         NEW LISTING 9/4/12
(Click on above thumbnails to enlarge photos)

CheckMarkSmall_web.jpg (792 bytes)  warranty
NEW
AUDIO-TECHINCA
PROFESSIONAL / DJ / SOUND SYSTEM / CLUB STEREO TURNTABLE
AT-LP1240USB
DIRECT DRIVE
QUARTZ LOCKED OR MANUAL SPEED CONTROL
FULLY MANUAL
W/ 'REVERSE' PLAY
AND WHEN PURCHASED FROM OAK TREE VINTAGE WITH A NEW, DIAMOND CARTRIDGE NOW INCLUDED
NEW
for sale
Professional DJ / Club table. Quality tool for the 'long haul'! The Audio-Technica AT-LP1240-USB DJ turntable. Similar in design to some of the vintage turntable models, such as the Kenwood KD-550 'concrete base', the Sony PS-T1, and the Technics SL-1500, SL-1700MK2 or SL-D2 turntable models. This professional stereo turntable features a super high-torque, direct-drive motor for quick start-ups yet is perfectly quiet. Classic 'S' shaped tone arm with 'universal' head-shell that allows mounting of most any 'quality', 1/2' cartridge, either MM (moving magnet) or MC (moving coil). Tone-arm mounted in high quality 4-point, Gimbol bearing.

The AT-LP1240-USB plays back 33-1/3, 45 and 78 RPM records (78 is selected by pressing both 'speed' select buttons simultaneously). Its built-in phono preamp enables the turntable to be connected to a wide variety of music and home entertainment systems, powered speakers, and to A/V receivers that do not include a dedicated phono input (de-featable for 'old schooool' and 'REAL' receivers and integrated amplifiers that 'DO' have a built-in phono pre-amp. The turntable includes PC- and Mac-compatible Audacity software that converts the audio on a record to MP3, WAV or other format digital audio files.

NEW UPDATE--- We're now including the Audio-Technica AT-95E, MM, Elliptically cut diamond cartridge with tables purchased from us at Oak Tree Vintage.

Table has great mass at almost 30 lbs!

Professional features for DJ use in nightclubs, touring & mobile applications:

- Direct drive high-torque motor
- Quartz Locked Speed Control System or 'Manual' Strobe Speed controls
*- Adjustable Braking Rate (0.2 6.0 seconds)
*- Adjustable Starting Rate (0.2 6.0 seconds)
*- Dual Platter / Motor 'Start' / 'Stop' controls
- Fully-Manual operation
- Selectable 33/45/78 RPM speeds
(you will need to acquire a stylus / cartridge designed for playing '78 RPM' records to utilize that feature to it's fullest)
- Professional weight cast aluminum platter with slip mat (no PLASTIC platters here, unlike many of the NEW tables out there!)
- Classic 'S' style tone-arm
- High quality 4-point Gimbol bearing
- -inch mount universal head shell
- Strobe monitored, adjustable platter speed
- Fluid damped tone arm cuing
- Adjustable tone-arm counter weight
- Adjustable 'Anti-Skating' control
*- Adjustable Tone-Arm bearing height
*- 45 puck storage pin
- Internal Built-in Phono Pre-Amp of decent quality so if you MUST use this with some sort of 'home-theater-surround-sound-5.1, 7.2, or 8.BR549 receiver' that the manufacturer forgot to include the phono pre-amp on. If you have a 'REAL receiver', ie, an old-school, vintage, 2-channel receiver or integrated amp or pre-amp with a phono pre built-in, then you can flip a switch and bypass the 'built-in' phono preamp.
- USB outputconnects directly to your computer for plug-&-play use
- Forward or reverse play (this is a DJ feature, and if you value your vinyl or cartridge, DON'T USE 'Reverse'! If you have a crappy cartridge and are playing 'Frisbees', then 'go for it' if you're so inclined!
-
*Comes with Mac- and PC-compatible Audacity software and cables to digitize your LPs
If you appreciate the 'organic' sound of quality vinyl, then disregard the above stuff 'USB / SOFTWARE STUFF' and just 'LISTEN' to your vinyl the way it was meant.


SPECIFICATIONS:

Type:
3-speed, fully manual operation
Motor:
High-Torque, 16-pole, 3-phase, brushless DC motor
Drive System:
Direct drive
Speeds:
33-1/3, 45, & 78 RPM
Pitch Variation:
+/-10%
Turntable Platter:
332mm, Die-cast aluminum
Starting Torque:
>4.5 kgf-cm
Braking System:
Electronic brake
Wow and Flutter:
> 0.1% WRMS (JIS WTD) with 33 RPM
Tone-arm type:
Static balanced, Classic 'S' shape, universal head shell
Effective Arm Length:
230mm
Overhang:
15mm
Height of tone arm adjustment range:
0-6 mm
Tracking Error:
> 3 degrees
Applicable cartridge weight Without head shell:
3.5- 8.5 g
Anti-skating range:
0-3 g
Signal-to-Noise Ratio:
>55 dB DIN-B
Output Level Pre-amp "PHONO":
2.5 mV nominal at 1 kHz, 5 cm/sec
Pre-amp "LINE":
150 mV nominal at 1 kHz, 5 cm/sec
Phono Pre-Amp Gain:
36 dB nominal, RIAA equalized
RIAA 20-20kHz, +1/-3dB (In: 1.5mV 1kHz)
 USB Function: A/D, D/A- 16 bit 44.1 kHz or 48 kHz USB selectable
Computer interface:
USB function
A/D, D/A 16 bit 44.1 kHz or 48 kHz USB selectable
Computer interface USB 1.1 Compliant Windows XP or
above or MAC OSX or above

Power Supply Requirements:
115V AC, 60 Hz


Includes :

Software included: Mac- and PC-compatible Audacity software
Accessories Included: 'Universal' Head shell,
Slip mat: dust cover: platter: 45 RPM adapter: counterweight: head shell: power cord: USB cable: dual RCA (female) to 1/8" (3.5 mm) mini-plug (male) stereo adapter cable: dual RCA (female) to 1/8" (3.5 mm) mini-plug (female) stereo adapter cable: dual RCA (male) cable with integrated ground wire: stylus target light: Audacity software (CD)
*System requirements (if you're planning on using the table to transfer and burn your LP's / albums, records to CD ROM or your computer hard drive or some other MP3 format):
PC or Mac with an available USB port (USB1.1 or higher), CD-R or CD-RW writer for burning CDs & installation.
Includes Audacity software for PC & Mac users
(Audacity requires Mac running OS X 10.1 or later or PC running Windows (98 and above))
(Refer to included software guide (also available online at www.audio-technica.com) before connecting the turntable to your computer.)
Comes with the Audio-Technicas' 1 Year limited warranty handled through the AT. See Audio-Technica AT-LP1240USB turntable owners manual or AT's web site for further details.
Dimensions w 17.72" x d 13.9" x 6.6" H and weighs a HEAVY 28 lbs.
AUDIO-TECHNICA AT-LP1240USB TURNTABLE
Cond.- NEW

$529.99
and when purchased from Oak Tree Vintage also includes *AT-95E CARTRIDGE!

*Turntable shipped directly from AT and the Cartridge will be shipped from us at Oak Tree Enterprises, LLC. Once products arrive, please call us for assistance with re-balancing tone arm and setting the 'Anti-Skate' adjustment.

* Denotes change / addition from previous model
 

 
 

    


   

     

NEW ADDITION 8/27/19
(Click on above thumbnails to enlarge photos)
CheckMarkSmall_web.jpg (792 bytes) warranty
RESTORED / REFURBISHED / FULLY SERVICED / WARRANTED
VINTAGE STEREO RECEIVER
SANSUI 2000X STEREO RECEIVER
140 WATT RATED DYNAMIC POWER
 #...0852
Circa '73-76
"WORLD AC POWER"
MIJ

SOLD 9/11/19
SHIPPING TO LYN IN CALIFORNIA


 Our technician has completely gone through and 'Certified' this unit.

 Everything was cleaned inside and out including all contacts, switches, controls and I/O jacks.

 Control Pot shafts re-sprung.

 Internal and external fuses checked and replaced where necessary.

 All 4 power transistors removed and tested for leakage.

 Re-flowed multiple solder joints

 We also aligned the tuner front end for optimum AM & FM performance as older internal tuner components have always drifted on vintage gear over the years.

 We re- aligned the tuner dial indicator for improved accuracy

 All meter, dial, and FM stereo lamps replaced for trouble-free service (very difficult to do on this series of receiver). 6x #40 & 4x #25-130 bulbs / lamps.

 Tuner string re-tensioned for improved flywheel 'grip'

 Amplifier section had output bias and DC offset adjusted to spec levels

 Repaired 'open' coil on tuning meter

 Entire unit cleaned / detailed cosmetically inside and out, including a fresh coat of lemon oil rubbed into the Real Walnut wood veneer cabinet, while chassis was removed.

 All inputs have been tested and both side produces clean and even sine waves into static 8 & 4 Ohm loads! No power supply hum of any kind. It's dead silent! All functions test fine.

 Following our restoration procedures, the unit was run continuously at medium volume, as all our amplifier / receivers are, into a load with "Loudness" on and both Tone Controls at 10 for 48 hours and into a 4 Ohm Load! You will not be disappointed. Total restoration / tech time investment ~13 hours.

 On our test bench, both this unit's amplifiers, #...1204 produced peak power of 18 Volts per channel @ 8 Ohms for 40 Watts and 15 Volts @ 4 Ohms for 56 Watts per channel via discrete, TO-3, metal cased outputs with 1 kHz input. (4x Toshiba 2SC793, (same as Sanken 2SC1111)).
 Idle current draw measured at 0.2A. Bias adjusted to spec of 20mA. (which by the way, once biased, brought the idle temperature of the heat-sink down from ~220F degrees to ~68F)
 DC offset adjusted to <15mVDC L & R unloaded and ZERO mV loaded (from the 75mVDC exhibited initially).
 Floor noise measured at -60dBm AC w/ AUX shunted).
  ____________________________
  
This receiver is from what many consider to be one of Sansui's best eras. The Sansui 2000X stereo receiver. The "X" suffix designates upgraded F-6013 driver boards that are sought after by owners of "non-X" units as an aftermarket upgrade. We have had a few 'X000' series Sansui units and they are among some of the best sounding, 'vintage', 'main stream' amplifiers we have heard. Lots of headroom and punch! Similar in sound to many of the NAD amplifiers / receivers we sold back in the 80's. This one also is installed in the optional, REAL walnut wood veneer case that's in beautiful condition as well.

Sansui 2000X Features include:


  Weighted flywheel, 'slide rule' style analog tuning
  Dual Tuning Capacitors. One for FM and one for AM. Allows for incredibly 'quiet' tuning
  Speaker Damping Selector
  A, B, A+B, Off, speaker positions
  Separate Left and Right, Bass and Treble w/ 'concentric' controls
  Hi-Filter for reducing tape hiss / electronic hiss & noise and record static
  Built-in Subsonic Filter to eliminate excess rumble from sources such as turntables
  Pre-Amp Out / Power-Amp In Loop (unique to the "X" version)
  'TRUE' tape monitor featuring both RCA and DIN I/O's (Tape Monitors can be used with Tape decks such as Cassette Tape Recorders/ Players, Reel to Reel's, 8Track Tape Cartridge Decks, Video / CD / DVD / VCR / DAT / MP3 / iPod / iPad / iPhone / iTouch / i-Gadget / MP3 / XM / SIRUS CDR (CD recorders as well as for inserting signal processors, such as EQ's, Reverbs, Spatial Enhancers / Dynamic Processors, Noise Reduction units, Special Effects units, Time Delays, etc)
  Aux inputs (may also be used for Video / CD / DVD /DAT / VCR / MP3 / iPod / iPad / iPhone / iTouch / i-Gadget / MP3 / XM / SIRUS  etc.)
  Tape B to Tape A Dubbing capability
  Dual Phono / Turntable inputs with Built-In Phono Pre-Amps
  "Loudness" function to boost Bass and Treble in relationship to Mid frequencies at lower volume levels for a much fuller sound.
  Stereo / Mono selector for Pre-Amp separate from the FM tuner selector
  Pre-Amp Stereo / Mono selector
  Stereo Reverse selector (great for troubleshooting speakers)
  FM Muting separate from the Stereo / Mono selector
  FM MPX filter (removes the 19kHz pilot signal from FM broadcasts)
  Rear located MPX Separation & Level adjustments
  FM Dist / Loc selector
  Front mounted 1/4" stereo headphone jack
  Tuning window features VU meter for tuning signal strength
  Rear located speaker and main power protection fuses
  Vertically finned heat sinks for very efficient cooling and long life
  Built-In Ferrite 'Stick' AM antenna
  True "WORLD AC POWER" allows unit to be operated on 50 or 60 Hz AC and will select voltages from 110v, 120v, 220v and 240 Volts AC input.
  Dual AC convenience outlets on rear panel with 1 switched and 1 un-switched

Sansui 2000X SPECIFICATIONS:

POWER / PRE AMP SPECIFICATIONS:

Music Power: 140 Watts dynamic @ 4 Ohms
100 Watts dynamic @ 8 Ohms
Cont rated RMS Power: 2 x 52 Watts @ 4 Ohms, 20-20k & <0.8% THD
THD; 0.8% @ full rated power
IMD; 0.8% @ full rated power
Power Bandwidth (IHF); 20Hz-40kHz
Damping factor; 24 @ 8Ω & full bandwidth
Hum and Noise;  70dB on Phono w/ 2.5mV input and 80dB w/ 5.0mV input
Input Sensitivity AUX / Tape; 150mV @ 100kΩ
Bass Control;  12dB @ 50hz
Treble Control;  12dB @ 10khz
High Filter;  -10dB @ 10kHz
Low Filter;  -10dB @ 50Hz
"Loudness" Contour;  +8dB @ 50hz & +3dB @ 10kHz (volume control @ -30dB)

TUNER SPECS FOR FM:
Tuning Range;
88-108mHz
Freq Response; 30-15kHz
Capture Ratio; 1.0dB
S/N; > 60db Stereo
20dB Quieting Sensitivity Mono; 1.4μV
FM Alternate Channel Selectivity; > 40dB
Spurious Radiation; <34dB
Spurious Response Rejection; >90dB
Image Rejection Ratio; >90dB
THD 65dBf @ 1kHz, Mono;  <0.8%
Stereo Separation Ratio: >35dB @ 50Hz to 10kHz

TUNER SPECS FOR AM:
Tuning Range;
535-1605kHz
Image Frequency Rejection; >50dB @ 1kHz
IF Rejection; >80dB @ 1kHz
Useable Sensitivity; 100μV / m @ 1kHz with ferrite stick antenna
Selectivity; >20dB @ 1kHz

PHONO SECTION SPECS:
Freq Response;
20-20kHz

THD; 0.8% @ 200 mV @ 1kHz
Input Sensitivity; 2.5 mV @ 50kΩ on 'Phono-1' & 2.5 mV @ 100kΩ on 'Phono-2'
Max input; ~200 mV @ 50kΩ

Again, we have completely gone through this unit. This is the first Sansui 2000X we have refurbished in a few years. Brushed aluminum face and knobs in like NEW condition. Unit looks and sounds great! Originally 'Optional', but now included, Real Walnut wood, veneer case in decent condition, also in NEAR NEW condition with only the most minor of visible wear.
Again, these are known for their exceptional tuner quality on both AM and FM and their VERY PUNCHY sounding amplifiers. Very 'Musical' sounding stereo receiver. Measures 18" wide x 14" deep x 6.5" deep and weighs a whopping 34 lbs unpacked. Comes with standard 90 day limited warranty.
SANSUI 2000X STEREO RECEIVER
Cond. 8.5++

SOLD 9/11/19
SHIPPING TO LYN IN CALIFORNIA

(Cons. M.H.)


(Above text, in it's entirety, property of www.oaktreevintage.com / Oak Tree Enterprises, LLC. See 'Copyright Information' page for details)

 

 

 

    

   

      NEW LISTING 5/21/18
(click on above thumbnails to enlarge photos) 
CheckMarkSmall_web.jpg (792 bytes) warranty
 
CLASSIC STEREO SPEAKERS
 JBL L100 'CENTURY'
#...1011A / 9060A
  Circa mid 1971-77
 MADE IN USA

SOLD 5/23/19
SHIPPING TO STEPHEN IN COLORADO


   One of the top 'Classics' and one of the most sought after speaker models ever made. The JBL L100 Century speakers. It's hard to expand on what's already been written out there about these speakers. Most fans of these know some version of the JBL L100 story or link to an appreciation web site. They have been one of my favorites for some years now, and I finally just finished a pair for myself to keep as well. They are capable of high volume levels while producing "pounding" & "tight" bass with great balance on the top and mid end. Just a great 'all-around' speaker for home audio listening or recording studio monitor use. Just as happy with a medium-small size amp as they are with amps of larger size (probably not efficient enough to enjoy with a small wattage, under 25 Watts or single ended tube amp).
 Our speaker tech has completely gone through and 'certified' these. Tweeter diffusion foam replaced. All drivers were removed and reinstalled into cabinet with added gasketing material under their frames to further reduce any possibilities of vibration or acoustic anomalies.  'High' and 'Mid' Attenuators checked for functionality (these attenuators have wipers that go 'a bit too far', thus go past their coils at 100% rotation, so for 100% signal, adjust to extreme 'clockwise', then back them off 1-2mm). The tweeters have new dispersion foam installed. Grill front frames re-covered and look fabulous (while not shown in the above photos, the "JBL" logo badges are intact on the frames). Next, as always they were tested with both recorded material, PN 20-20k and swept them with our AF generator from 20-3kHz. Then came our standard, 'abusive' test recordings.  The only cosmetic issue worth mentioning, is that the top of one cabinet appears to have been re-veneered, and does not match the cosmetics of the other cabinet (see photos above & reflected in the price). Other than that the front corners and edges are all nice and crisp with virtually no wear.
Cabinets were finished off with a coat of Lemon Oil and then hand-rubbed with Feed-n-Wax. They look GREAT!
Following the above work, these speakers are ready to go!
We auditioned this pair well. Following the above mentioned 'barrage', our demo cuts ran the gamut from Dire Straits, 'Brothers in Arms', TLC 'Fan Mail', Allison Kraus and Union Station, Nickelback, and a few others, all digitally recorded and some 'DDD'.
'Solid', punchy and 'tight' low-end, with no 'mush'. Overall, Great 'tone' quality, but then again, they're one of the most famous and sought after speaker models ever made. Heck, most of the above cuts may have been originally mixed on a pair of these.
 From an original JBL brochure from 73,

    
  The JBL L100, is the most successful speaker ever produced by JBL. It may well be the most successful loud speaker in its class ever produced by anyone.
      The JBL L100 is essentially the JBL 4310 studio monitor in a more handsome cabinet and was the most expensive bookshelf speaker in its time.

  
   JBL L100 Century FEATURES:
 

- 3-Way, Bass Reflex cabinet design 
- 12" / 30cm, JBL 123-A, Die-Cast-aluminum framed, "Ribbed", cone woofer, coated with Lansaplas, an anti-resonance material to reduce radial eddy currents (reason for the white color), w/ 3, Edge-wound copper ribbon Voice Coil, surrounded by a powerful 6.75 lb AlNiCo V magnet.
- 5"JBL LE5 Midrange Die-Cast-aluminum framed, Non-deteriorating paper surround, 7/8 VC and 2.75 lb, AlNiCo magnet
- 1.4" JBL LE25 Tweeter, Die-Cast-aluminum framed, w/ 5/8 copper wound VC & Non-deteriorating paper surround Cone-Tweeter
- "Real" internal 3-Way cross-over
- Hi and Mid attenuators on front panel for custom tailoring sound to your tastes and listening room
- 2.75" tuned port for extending bass response
- Real wood Walnut Veneer Finish on well built, heavy wall cabinet
- Speaker input connectors have been upgraded from the historically anemic JBL connectors used during that era, to heavy duty, 3-Way, binding posts
  
JBL L100 CENTURY SPECIFICATIONS / SPECS:
Frequency Response: Not Specified on most JBLs
Efficiency: ~85 dB 1W@ 1m
Nominal Impedance: 8Ω each
Cross-over frequencies: @ 1.5k & 6kHz
Continuous / Max power rating: 50 continuous to clean peaks of ten fold
   
The JBL L100 Centurys are from what most folks (including us) would argue was JBLs 'Pinnacle' period, and were offered in the same line-up that gave us the such great JBL models such as the JBL L26 & L36 Decade series speakers, the JBL L300A Summit speakers, the JBL L65 Jubals, the JBL L166 Horizon speakers, The monstrous JBL Paragon D44000 speakers and of course the industry standard, JBL 4310, 4311 4311B & 4312 studio monitors. Again, we have completely tested all drivers at individually applicable frequencies with a sweep generator looking for any irregular anomalies in either the drivers or cabinet structure integrity.
HUGE in SONICS! These are one of the most incredible sounding speakers you will hear. These have most everything we look for in a home audio speaker such as 'balance', detail, power handling, accuracy, punch and 'largeness of sound'. These are in excellent condition as well. Plenty of top end that can be filtered / tailored to your tastes with built-in attenuators. Huge, DEEP low-end that still stays incredibly tight (shakes the concrete floor in our demo room). They are able to handle "power" MUCH better  than your average speaker. Not simply referring to they're wattage rating, but just the way the perform at higher power / volume levels without "falling apart" sonically. We 'stood' on them HARD with our test Hafler power amp. JBL L100s are always among the top performers of the many speakers we have auditioned over the years. 
 Also, again, these look great having the above mentioned work. JBL L100s are one of our favorite speakers and for 98% of folks out there, probably one of the most listenable speaker you will own for all-around music genres and power applications.
If you are looking for a great performing pair of JBL L100s, sonically as well as cosmetically, then here you go! Comes with a link to an e-copy of the original 73 brochure. Each measures 23.5" h x 14.25" w x  13.75" d and weighs 52 lbs unpacked. Includes our 90 day warranty (excluding problems due to under / over powering)
JBL L100 'Century' SPEAKERS
Condition 8.5 (only due to 'top veneer mismatch')
with grills
(Cons.) M.R.

SOLD 5/23/19
SHIPPING TO STEPHEN IN COLORADO



 
 (Above text, in it's entirety, property of www.oaktreevintage.com / Oak Tree Enterprises, LLC. See 'Copyright Information' page for details)

 

 

 

    

        NEW LISTING 11/2018
 
(click on above thumbnails to enlarge photos) 
CheckMarkSmall_web.jpg (792 bytes) warranty
VINTAGE KENWOOD SPEAKERS
KENWOOD KL-777X
15" WOOFER / 3-WAY / 4-DRIVER
200 WATTS

WITH TWEETER / MID PROTECTION ADDED
#...0829/0904
Circa 1979-81
Made in Japan

SOLD 12/20/19
SHIPPING TO DAN IN CALIFORNIA

Classic lattice grill, vintage & large Kenwood KL-777X stereo speakers. 3-Way, 4-Driver, Bass Reflex cabinet design. These are VERY efficient speakers with above average tone balance for late '70's speakers. Plenty of top end that can be filtered / tailored to your tastes with built-in attenuator or external EQ / tone control. Also HUGE & tight low end, likely due to the ported and very 'tuned' cabinet design. They also seem to be able to handle "power" better than your average speaker. Not simply referring to they're wattage rating, but just the way the perform at higher power / volume levels without "falling apart" sonically.

Our speaker tech has completely gone through and 'Certified' these.

- All drivers were removed and tested individually.

- Attenuators / L-pads cleaned for 'intermittent free' performance.

- Poly-Spun batting added to existing damping material to 'tighten up bass response' and reduce cabinet 'ring'.

- We were originally prepping these speakers for a commercial application (Micro-Brewery) so for more 'trouble-free' durability, we added #1156 bulbs as 'shock absorbers' to the tweeters and midranges (as we commonly do for 'commercial applications' or where there's a chance a speaker may be subjected to more stringent duty cycles).
(This particular chain of 'mid-western' micro-brews have purchased dozens of pairs of speaker from us over the past 5 years, actually consuming most of the 'lattice grill' units that have come in to us. These were a in a batch that we did for their last location, that were not needed in the end, as that install had more than enough)

- Gasket / sealant material was added to all driver mounting flanges, prior to re-installation to reduce any possibilities of vibration or acoustic anomalies.


Cosmetically, cabinets were cleaned & the wood grain, vinyl wrapped cabinets are in decent shape with typical nicks and scuffs. One of the Poly molded grills has some 'chunks / chips' out of one corner, but other than than, both are in good 'structural' shape (see photos above). Felt feet were installed to the cabinet bottom plates.
Next, as always, they were tested with both recorded material, PN 20-20k and swept them with our AF generator from 1Hz-3kHz.
Then came our standard, 'issue exposing' and on some levels, 'abusive' test recordings. These speakers are ready to go!

We auditioned this pair extensively and 'THEY DELIVERED' as expected, but additionally adding the 'gasketing' really 'tightened' up the cabinets and cleaned up the bass response. The 'bass' is not only solid and tight on these speakers, but goes VERY DEEP.

Our demo cuts included the following; Dire Straits' "So Far Away" from their album 'Brothers in Arms' album,
Donald Fagens, "I.G.Y." from the album "Night Fly"
(solid / snappy reproduction), '24K Gold Edition of Jennifer Waren's "Famous Blue Raincoat' (the saxophone was a bit bright, but not offensive, smooth),
TLC's "Scrub" from their album 'Fan Mail'
(did 'sub-bass' note @ 1'25" & 1'35" decently,
Allison Kraus and Union Station's "Baby, Now That I've Found You"
(upfront and natural),
Cowboy Junkies Sweet Jane
(VERY open),
Don Williams' DDD version of 'Country Boy'
(good, 3-D soundstage),
Calvin Hampton's, "The Wedding March" from "Digital Pipes, The Splendor of the Organ", a digital recording of a cathedral pipe organ
(open and HUGE!),
Trapts Headstrong
(was solid and the woofers exhibited no sign of fatigue even at upper power levels)
Just about anything from "KORN" ROCKED!!!
Most of the cuts from Michael Jacksons' 'Number Ones' such as "Bad" "Beat It", and "Billy Jean", were strongly reproduced and VERY solid,
Van Halens' cut "Drop Dead Legs" from the CD "1984" ROCKED!

Nickel Creeks When in Rome from their CD "Why Must the Fire Die?"
(was a BIG, open and up-front),
and a few others, all digitally recorded and some 'DDD'.

 Incredible power handling characteristics for a speaker this size. They are able to handle "power" better MUCH than your average speaker. Not simply referring to their wattage rating, but just the way they perform at higher power / volume levels without "falling apart" sonically. We 'stood' on them HARD with our test Hafler 500 Watt power amplifier. 'Solid', punchy and 'tight' low-end, with no 'mush'.

We auditioned this pair extensively and 'THEY DELIVERED' as expected, but additionally adding the 'gasketing' really 'tightened' up the cabinets and cleaned up the bass response.

Great sounding speaker for that classic 70's stereo receiver or amplifier!
 We have completely tested them with both recorded material, PN and swept them with our AF generator.

Kenwood KL-777X Features

- 15" Non-deteriorating Cloth surround Woofer
- 6.25" x 2" Exponential-Horn / Upper Midrange
- 2x 2.5" Tweeters
- "Real" internal cross-over, not just a couple of "caps" on the mids and tweets
- 3-position Hi frequency attenuators, using resistors, not failure prone Ni-Chrome wire, for custom tailoring sound to your tastes and listening room

- Dual 2" Tuned ports for extended low end


Kenwood KL-777X Specifications:

Enclosure Type: Bass Reflex / Tuned-Ported
Frequency Response: ~20-21,000Hz +- 3dB
Efficiency: ~96dB 1w @ 1m
Nominal Impedance:
Cross-over frequencies: 2kHz and 8kHz
Recommended Nominal Power Amplifier range: 10-250 Watts
Recommended Power Rating: 100 Watts
Recommended MAX Power rating: 200 Watts


Very nice looking wood grain, vinyl wrap cabinets with only a few, minor 'battle scars'. Again, as stated above, both Poly molded grills in fair shape as one has the 'chips / chunk' from the top corner (see photos above).
All drivers are in perfect condition, work and sound fine! Tested for all frequencies with a sweep generator.
Speakers look fine (except for the above mentioned grill issue) and sound GREAT! Huge, accurate and loud sound, but also very efficient at lower powers due to their 96dB rating! If you're looking for a great performing speaker at medium to higher vol
ume applications, you will not be disappointed with these speakers. Each measures
25.75" H X 23" W X 10.5" D and weighs 37 lbs unpacked. Includes our standard 90 day limited speaker warranty (& excluding problems due to under / over powering)
KENWOOD KL 777X
Cond. 8 (due to scuffs / grill chip)
with grills
SOLD 12/20/19
SHIPPING TO DAN IN CALIFORNIA

(Cons.) C.B.S.

 
 (Above text, in it's entirety, property of www.oaktreevintage.com / Oak Tree Enterprises, LLC. See 'Copyright Information' page for details)



 

 

      

      NEW LISTING 11/2018
(click on above thumbnails to enlarge photos) 
 CheckMarkSmall_web.jpg (792 bytes) warranty
VINTAGE
RECTILINEAR III "TALL BOYS"
STEREO SPEAKERS
#...7942 / 7982
Circa 1968-73
MADE IN THE USA!

SOLD 5/5/19
SHIPPING TO FRANK IN CONNECTICUT

Our speaker tech has completely gone through and 'Certified' these.  We have completely tested all drivers. Original mids' were 'questionable' on the 'audio sweep' so the Midrange's were replaced with a pair of 'originals' we had 'rat-holed' here at Oak Tree Vintage. All drivers were removed and reinstalled into cabinet with added gasketing material under their frames to further reduce any possibilities of vibration or acoustic anomalies. Both Mid and Top End attenuators had their contacts burnished and were cleaned internally. Next, as always they were tested with both recorded material, PN 20-20k and swept them with our AF generator from 20-10kHz. Then came our standard, 'abusive' test recordings. We also converted the grills from a 'nailed on' attachment to Velcro and added 'pull-tabs' to facilitate removal (commonly if someone has tried to remove the grills from Rectilinear 'Hi-Boys', the masonite frames will be broken / cracked from being pulled away from the baffle board nails. These were expertly removed, thus are completely intact and un-broken). These speakers are ready to go!

Rectilinear 'III Tall Boys' features include:

- 4-way, 6-Driver, Bass Reflex speaker design
-12" Low Frequency Driver (woofer) (Jensen)
- 5" 'Philips" Midrange w/ 'whizzer cone' & w/ AlNiCo magnets
- 2x 2.5" 'Danish made Peerless' Tweeters w/ AlNiCo magnets
- 2x 2" 'Danish made Peerless' Tweeters w/ AlNiCo magnets
- 2" Tuned port for extended bass response
- Dual Attenuators


Rectilinear 'III Tall Boys' Original Specifications:

Frequency Response: 22-18,500Hz +- 3dB
Nominal Impedance:

Cross-over frequencies:
@ 500Hz, 3kHz & 11kHz
Recommended Power amplifier rating:
20-100 watts

From a 1967 Stereo Review Julian Hirsh had this to say about the Rectilinear III, "
Over a period of several months, we have had the opportunity to compare it with a number of other speakers that can 'outpoint' the Rectilinear III on any "individual" characteristic-frequency range, smoothness, distortion, efficiency, dispersion or transient response. However, none of the speakers combine ALL of these properties in such desirable proportions as the Rectilinear III", and  in a 1972 Stereo Review, he had this to say about the Rectilinear III, "...the two samples we have tested are among the best-sounding and most 'natural' speakers we have heard"
This pair actually has 'Jensen' built 12" woofers from the factory (my personal Rectilinear III-High-Boys do not. Just FYI.) These are great sounding 12" 4-way speakers. All drivers feature a non-deteriorating cloth surrounds. The driver compliment consists of one heavy duty 12" woofer, one 4" midrange with hi-mid whizzer cone, two 2.5" cone tweeters and 2 1/5" cone super tweeters. Bass is enhanced via a 3" tuned port.
System input is via binding-post / banana jacks. The input plate also features midrange and hi-freq attenuators, and the "MADE IN THE USA" plate. The entire enclosure is damped with batting. The cabinets are a beautiful American Walnut with very nice grain featured throughout and are in near new condition. These have great efficiency, but are still able to handle bigger power. Huge bass and crystal clear highs with just enough mids.

These things ROCK! I know. These are the pair from my personal 'speaker stash / collection'.

They measure 35" tall x 18" wide x 12" deep and each weighs 70 lbs unpacked. Comes with an 'e-copy' /pdf download of the Rectilinear Owners manual, as well as a few 'e-copies' of original brochures. Includes our 90 day warranty (excluding problems due to under / over powering)!
RECTILINEAR III
Cond. 8+
with grills
SOLD 5/5/19
SHIPPING TO FRANK IN CONNECTICUT


(Due to the dimensions and / or weight of these speakers, Packing / SHIPPED will be somewhat more 'involved' than typical. Custom, double-wall boxes will be manufactured specifically for them. While we order custom built boxes often, this can sometimes delay SHIPPED by 5-10 days)

 (Above text, in it's entirety, property of www.oaktreevintage.com / Oak Tree Enterprises, LLC. See 'Copyright Information' page for details)

 

  

 

 

    

NEW LISTING 11/9/18
(click on above thumbnails to enlarge photos) 
CheckMarkSmall_web.jpg (792 bytes) warranty
RESTORED / REFURBISHED / FULLY SERVICED
VINTAGE
TECHNICS SPEAKERS
MCS / TECHNICS
8320
#...A506 / A545

Circa Late 1970's early 1980's
MIJ

SOLD 11/12/18
SHIPPING TO WILLIAM IN MARYLAND

These are from an upper-end line of speakers that Technics produced for MCS. The "Linear Motion" line used a Tri-Planer baffle board design to more correctly "time align" the 'top end' drivers with the woofer. The Midrange is on a 'spacer' to position it (time-wise) between the tweeter and woofer. This design was based on the Flagship (and very expensive) Technics SB-7070 speakers.

Our speaker tech has completely gone through and 'Certified' these. We have completely tested them with both recorded material, PN 20-20k and swept them with our AF generator.  
MCS 8320 Features include:

- 3-Way, Bass Reflex cabinet
- 'Time-Aligned' / Bi-planar baffle board

- 2
" Pulp-cone tweeter
- 4" Pulp-cone Midrange
- 12" Ribbed, Pulp-Woofer with
non-deteriorating Cloth surround
- 2.25" tuned port for extending low end

- External, resettable protection relays for all drivers
- 'Spring Clip' Speaker terminals


MCS 8320 Specifications / Specs:

Frequency Response: 32-22,000Hz +- 3dB
Efficiency: ~92dB 1W@ 1m
Nominal Impedance:
nominal
Recommended Minimum Power amplifier rating: 15 Watts minimum


Again, all
drivers tested, work and sound fine! Tested for all frequencies with a sweep generator. Speakers cleaned inside and out. They have black cloth grills and the cabinets are a mixture of black and walnut grain vinyl wrapped. Cabinets and grills are in great shape. Grills still have all locating pins intact and frames are free of breaks / cracks etc. Each cabinet measures 24" tall x 13.5" wide x 12.25" deep and weighs 26 lbs unpacked. Includes our standard 90 day limited warranty ( & excluding problems due to under / over powering)
Technics
MCS 8320 Stereo Speakers

Condition 8.5++
with grills
(Cons.) R.R.
SOLD 11/12/18
SHIPPING TO WILLIAM IN MARYLAND


 
 (Above text, in it's entirety, property of www.oaktreevintage.com / Oak Tree Enterprises, LLC. See 'Copyright Information' page for details)


 

 

    

NEW LISTING 11/2018

 
(click on above thumbnails to enlarge photos) 
CheckMarkSmall_web.jpg (792 bytes) warranty
 
PRE-APPRECIATED
YAMAHA STEREO SPEAKERS / MONITORS
YAMAHA NS-A738 / NSA738 BIRCH FINISH
 
#...4631 / 4632 (consecutive numbers)
Circa 1999-2000
Made in the USA (yes, really)
SOLD 12/26/18
SHIPPING TO JIM IN LOUISIANA

Great looking, performing and sounding Yamaha NS-A738 3-way speakers have a room filling, "tight" sound that ensures sonic accuracy. Great for home use or project studio monitors. If you can't afford the famous Yamaha NS-10's (now, currently north of $1000.00), then these may be an affordable alternative for your project recording studio (I used to be a dealer for NS-10's and have heard and sold many).


Our speaker tech has completely gone through and 'Certified' these.
We have completely tested them with both recorded material, PN 20-20k and swept them with our AF generator. Prior to testing with the sweep generator, we added gasket material under all the driver flanges in each cabinet to eliminate resonate vibrations. This is really a 'finishing touch' on this model of Yamaha's that should have been done at the factory, but is rarely done by most companies / manufacturers. We also added 'poly-spun' batting to the cabinet space to further tighten up the low-end, eliminate hollowness / cabinet ringing. Again, should have been done at the factory, instead of relying an 'empty cab' to allow 'boomy bass' which on the original sales floor, made the box appear sonically 'larger' than it is by making the box seem to be producing more bass. The 'bass' that an un-damped cabinet produces is 'hollow and flappy', and not what you'll want to listen to over the long haul. That would be come very fatiguing soon.
Handles power decently and reproduced the low-end in our most difficult test CD! If you've read some of our other 'audition notes', you'll know what is meant when I say that these speakers, "reproduced the "TLC 'Sub-Bass' note' VERY well" when situated on the floor.

 Yamaha NS-A738 Features include:
   
- 3-Way, Acoustic Suspension design for studio monitoring "tight bass"
- 8 High-Compliance, Cloth Surround, Polypropylene Coated, Long-Throw woofer, woofer w/ non-deteriorating cloth surround
- 4 mid non-deteriorating paper surround
- .75 Ferro-Fluid Cooled, Mylar, Dome tweeter
- Infinite baffle for exceptionally tight bass

  

Yamaha NS-A738 Specifications:
  
Frequency Response:
90-20,000Hz 3.5dB  
Efficiency:
91dB 1W @ 1m
Nominal Impedance:
8Ω each
Cross-over frequencies:
at 4.2kHz & 13.5kHz (6dB / Octave)
Recommended Minimum Amp Size:
10 Watts
Maximum input power rating:
140 Watts
  

All drivers work and sound fine! Tested for all frequencies with a sweep generator and test CD's. Each finished in black, matte, vinyl wrap. Speakers look and sound GREAT! One of the best "all around" speakers we've heard in a long time at any size or price. Each measures 16" tall x 11" wide x 13" deep and weighs 14 lbs unpacked. Includes our standard 90 day limited warranty ( & excluding problems due to under / over powering)
YAMAHA NS-A738 STEREO SPEAKERS
Cond. 8.5+

SOLD 12/26/18
SHIPPING TO JIM IN LOUISIANA

  
 (Above text property of www.oaktreevintage.com / Oak Tree Enterprises, LLC. See 'Copyright Information' page for details)
 

 

   

 

    

         NEW LISTING
11/2018

 
(click on above thumbnails to enlarge photos) 
CheckMarkSmall_web.jpg (792 bytes) warranty
 
PRE-APPRECIATED
YAMAHA STEREO SPEAKERS / MONITORS
YAMAHA NS-A738 / NSA738 BIRCH FINISH

#...2166 / 2167 (consecutive numbers)
Circa 1999-2000
Made in the USA (yes, really)
SOLD 2/20/19
SHIPPING TO TED IN ARKANSAS

Great looking, performing and sounding Yamaha NS-A738 3-way speakers have a room filling, "tight" sound that ensures sonic accuracy. Great for home use or project studio monitors. If you can't afford the famous Yamaha NS-10's (now, currently north of $1000.00), then these may be an affordable alternative for your project recording studio (I used to be a dealer for NS-10's and have heard and sold many).


Our speaker tech has completely gone through and 'Certified' these.
We have completely tested them with both recorded material, PN 20-20k and swept them with our AF generator. Prior to testing with the sweep generator, we added gasket material under all the driver flanges in each cabinet to eliminate resonate vibrations. This is really a 'finishing touch' on this model of Yamaha's that should have been done at the factory, but is rarely done by most companies / manufacturers. We also added 'poly-spun' batting to the cabinet space to further tighten up the low-end, eliminate hollowness / cabinet ringing. Again, should have been done at the factory, instead of relying an 'empty cab' to allow 'boomy bass' which on the original sales floor, made the box appear sonically 'larger' than it is by making the box seem to be producing more bass. The 'bass' that an un-damped cabinet produces is 'hollow and flappy', and not what you'll want to listen to over the long haul. That would be come very fatiguing soon.
Handles power decently and reproduced the low-end in our most difficult test CD! If you've read some of our other 'audition notes', you'll know what is meant when I say that these speakers, "reproduced the "TLC 'Sub-Bass' note' VERY well" when situated on the floor.

 Yamaha NS-A738 Features include:
   
- 3-Way, Acoustic Suspension design for studio monitoring "tight bass"
- 8 High-Compliance, Cloth Surround, Polypropylene Coated, Long-Throw woofer, woofer w/ non-deteriorating cloth surround
- 4 mid non-deteriorating paper surround
- .75 Ferro-Fluid Cooled, Mylar, Dome tweeter
- Infinite baffle for exceptionally tight bass

  

Yamaha NS-A738 Specifications:
  
Frequency Response:
90-20,000Hz 3.5dB  
Efficiency:
91dB 1W @ 1m
Nominal Impedance:
8Ω each
Cross-over frequencies:
at 4.2kHz & 13.5kHz (6dB / Octave)
Recommended Minimum Amp Size:
10 Watts
Maximum input power rating:
140 Watts
  

All drivers work and sound fine! Tested for all frequencies with a sweep generator and test CD's. Each finished in black, matte, vinyl wrap. Speakers look and sound GREAT! One of the best "all around" speakers we've heard in a long time at any size or price. Each measures 16" tall x 11" wide x 13" deep and weighs 14 lbs unpacked. Includes our standard 90 day limited warranty ( & excluding problems due to under / over powering)
YAMAHA NS-A738 STEREO SPEAKERS
Cond. 8.5+

SOLD 2/20/19
SHIPPING TO TED IN ARKANSAS


 
 (Above text, in it's entirety, property of www.oaktreevintage.com / Oak Tree Enterprises, LLC. See 'Copyright Information' page for details)

 

 

 

    


               NEW LISTING 11/2018
(Click on above thumbnails to enlarge photos)
CheckMarkSmall_web.jpg (792 bytes) warranty
SERVICED / REFURBISHED*
KENWOOD STEREO PRE- AMP
KENWOOD CONTROL AMPLIFIER "Basic C2"

#...0478
Circa 1984-90
SOLD 11/25/19
SHIPPED TO ELLIOT IN WASHINGTON

Our technician has completely gone through this unit*.

We have completely gone through this unit, cleaning inside and out including all contacts, switches and controls.



 Unit originally presented with one channel down. As we've had a number of these, we knew that it was likely the "Balance" control potentiometer. It was the issue, so the pot was 'jumpered'*. Fairly 'excusable' work around as most folks are typically leaving their 'balance' control turned to the center 100% of the time anyway.
While this is a fairly versatile pre-amp, that we 'still like', it does have a few 'difficult to service' issues and a couple of 'semi-permanent' defects. Firstly there's a fairly common issue with the 'balance' control pot. It's anemic / fragile in the first place, which makes it prone to 'breaking' in such a way that it will drop channels. We have not found a replacement. There are a couple of websites that have photo essays on doing 'micro-surgery' on them, but it's very difficult, time consuming with sketchy results. Probably the most practical way to address the issue with the balance pot is to 'jumper' across it. It can either be left in place or removed once jumpered.

The same 'fix' can be utilized on the 'Headphone' level pot, then simply use the main volume of the pre-amp to control the headphone level (like EVERY other unit does).
(headphone level control still works on this unit)

 Unit All RCA I/O jack terminal solder joints re-flowed internally





  All inputs tested and both side produces clean and even sine waves!

  No power supply hum of any kind. It's dead silent! 

  All inputs tested and both side produces clean and even sine waves! Checked with O-Scope.

  No power supply hum of any kind. It's dead silent!
  
____________________________
 
 
Versatile Kenwood "Basic C2" Pre-amp / control center. Would match up well with any power amp and is very "utilitarian". Loaded with "real world" features. Again, with the exception of the 'bypassed balance control', the unit works well and sounds great! Cosmetically the only issue really worth mentioning is that the top, metal cover has scratches from someone sitting a unit with no feet on it and moving it around.

Kenwood C2 Features include:
 
 

- Separate Bass and Treble with selectable turnover frequency
- Turnover freqs set at 200 or 400 on the bottom end and 3k or 6kHz on the top end.
- Selector for MM or MC cartridges
- 5 position phono cartridge EQ selector (this feature, combined with the MM/MC selector / head-amp alone can be worth a few hundred dollars, if you're contemplating moving up to a Moving Coil turntable cartridge. MC carts require an extra head-amp and this amplifier has one built in)
- Built-in Low and Subsonic Filters to eliminate excess rumble from sources such as turntables. These are selectable for either 58Hz, 40Hz or 18Hz @ 18dB / Oct.
- Hi "Scratch" filter set at 8Khz with a slope of 12dB / Oct. Useful for reducing the 19kHz pilot tone in FM and tape hiss / electronic hiss & noise and record static
- Output defeat
- Mono / Stereo input selector

- Phono / Turntable input with Built-In Phono Pre-Amp
- Dual Tape Monitors with bi-directional dubbing
(may also be used for Video / CD / DVD / LD / VCR / DAT / MP3 / iPod / iPad / iPhone / iPod / iTouch / iGadget / eReader / MP3 / XM / SIRIUS etc. as well as for CDR)
- Dual (1 & 2) Aux inputs
(may also be used for Video / CD / DVD / LD / VCR / DAT / MP3 / iPod / iPad / iPhone / iPod / iTouch / iGadget / eReader / MP3 / XM / SIRIUS etc.)
- CD Input
(may also be used for Video / CD / DVD / LD / VCR / DAT / MP3 / iPod / iPad / iPhone / iPod / iTouch / iGadget / eReader / MP3 / XM / SIRIUS etc.)
- Tuner input
(may also be used for Video / CD / DVD / LD / VCR / DAT / MP3 / iPod / iPad / iPhone / iPod / iTouch / iGadget / eReader / MP3 / XM / SIRIUS etc.)
- "Loudness" function to boost Bass and Treble in relationship to Mid frequencies at lower volume levels for a much fuller sound.
- Headphone output with separate level control
- Indicator LED's for input selector
- 3 AC convenience outlets ( 2 switched 1 un-switched)

  
Kenwood C2 Original Specs:
  
 
Design type: 2 Channels, Analog operation
Frequency Response: 1-350kHz +0 / -3dB
Maximum Output Level: 1V
THD: 0.001% at full rated power
Phono MM Sensitivity: 2.5mV for 5.0V output @ 1kHz
Phono MM Maximum Input Level: 200mV
Phono MC Input Impedance: Selectable
S/N on Phono MM w/ 5mv signal: 94dB
Phono Capacitance: Selectable
High Level Sensitivity (tuner, Aux, Tape): 150mV

  
The Kenwood C2 has always been one of our favorite pre-amps under $600-$800. It's simply hard to beat for specs, features and performance. That is also evidenced by the fact that it was current in Kenwood's lineup, as their upper end pre, for almost half a decade. Again, we have completely gone through the unit cleaning all contacts, pots, switches and controls. All functions (again, with the exception of the 'Balance' control') test as original. Unit looks and sounds great! Unit measures 17.25" wide x 3" tall x 13" deep and weighs 10 lbs unpacked. Comes with original owners manual and includes our 90 day limited warranty.
KENWOOD BASIC C2
Condition 7.5 (due to balance control issue)

SOLD 11/25/19
SHIPPED TO ELLIOT IN WASHINGTON


(Above text, in it's entirety, property of www.oaktreevintage.com / Oak Tree Enterprises, LLC. See 'Copyright Information' page for details)



 

 

    

               NEW LISTING 11/2018
(Click on above thumbnails to enlarge photos)
CheckMarkSmall_web.jpg (792 bytes) warranty
SERVICED / REFURBISHED*
KENWOOD STEREO PRE- AMP
KENWOOD CONTROL AMPLIFIER "Basic C2"

#...0258
Circa 1984-90 
SOLD 1/30/20
SHIPPING TO STEVE IN OHIO

Our technician has completely gone through this unit*.

 We have completely gone through this unit, cleaning inside and out including all contacts, switches and controls.



 *Unit originally presented with one channel down. As we've had a number of these, we knew that it was likely the "Balance" control potentiometer. It was the issue, so the pot was 'jumpered'*. Fairly 'excusable' work around as most folks are typically leaving their 'balance' control turned to the center 100% of the time anyway.
While this is a fairly versatile pre-amp, that we 'still like', it does have a few 'difficult to service' issues and a couple of 'semi-permanent' defects. Firstly there's a fairly common issue with the 'balance' control pot. It's anemic / fragile in the first place, which makes it prone to 'breaking' in such a way that it will drop channels. We have not found a replacement. There are a couple of websites that have photo essays on doing 'micro-surgery' on them, but it's very difficult, time consuming with sketchy results. Probably the most practical way to address the issue with the balance pot is to 'jumper' across it. It can either be left in place or removed once jumpered.

The same 'fix' can be utilized on the 'Headphone' level pot, then simply use the main volume of the pre-amp to control the headphone level (like EVERY other unit does).


 Unit All RCA I/O jack terminal solder joints re-flowed internally





 *Unit also has an issue with the *'Hi-Filter' switch. While it has been cleaned and lubed, it will not 'lock in' so consider there's no 'Hi-Filter' on this one (yes, the circuitry still functions, but was not practical for use to source a replacement switch on this unit with the other two issues. "Hi-Filter" is also a fairly 'fringe' feature and seldom used by most folks, so we decided it was 'excusable')

 *Unit also has the issue, common with the "Balance" control potentiometer affecting the headphone amplifier, with additional issue with the 'headphone' section, thus we have bypassed the entire headphone functions on this one.

All inputs tested and both side produces clean and even sine waves! Checked with O-Scope.

  No power supply hum of any kind. It's dead silent! 
  
____________________________
 
 
Versatile Kenwood "Basic C2" Pre-amp / control center. Would match up well with any power amp and is very "utilitarian". Loaded with "real world" features. Again, with the exception of the 'bypassed balance control', the unit works well and sounds great! Cosmetically the only issue really worth mentioning is that the top, metal cover has scratches from someone sitting a unit with no feet on it and moving it around. Also, as the 'Balance' and 'Headphone Level' are 'non-functional', we inserted hole plugs where the knobs would be (the pots are still there if anyone wants to attempt a repair in the future.)

Kenwood C2 Features include:
 
 

- Separate Bass and Treble with selectable turnover frequency
- Turnover freqs set at 200 or 400 on the bottom end and 3k or 6kHz on the top end.
- Selector for MM or MC cartridges
- 5 position phono cartridge EQ selector (this feature, combined with the MM/MC selector / head-amp alone can be worth a few hundred dollars, if you're contemplating moving up to a Moving Coil turntable cartridge. MC carts require an extra head-amp and this amplifier has one built in)
- Built-in Low and Subsonic Filters to eliminate excess rumble from sources such as turntables. These are selectable for either 58Hz, 40Hz or 18Hz @ 18dB / Oct.
- Hi "Scratch" filter set at 8Khz with a slope of 12dB / Oct. Useful for reducing the 19kHz pilot tone in FM and tape hiss / electronic hiss & noise and record static (again, NON-functional on this particular unit, #...0258)
- Output defeat
- Mono / Stereo input selector

- Phono / Turntable input with Built-In Phono Pre-Amp
- Dual Tape Monitors with bi-directional dubbing
(may also be used for Video / CD / DVD / LD / VCR / DAT / MP3 / iPod / iPad / iPhone / iPod / iTouch / iGadget / eReader / MP3 / XM / SIRIUS etc. as well as for CDR)
- Dual (1 & 2) Aux inputs
(may also be used for Video / CD / DVD / LD / VCR / DAT / MP3 / iPod / iPad / iPhone / iPod / iTouch / iGadget / eReader / MP3 / XM / SIRIUS etc.)
- CD Input
(may also be used for Video / CD / DVD / LD / VCR / DAT / MP3 / iPod / iPad / iPhone / iPod / iTouch / iGadget / eReader / MP3 / XM / SIRIUS etc.)
- Tuner input
(may also be used for Video / CD / DVD / LD / VCR / DAT / MP3 / iPod / iPad / iPhone / iPod / iTouch / iGadget / eReader / MP3 / XM / SIRIUS etc.)
- "Loudness" function to boost Bass and Treble in relationship to Mid frequencies at lower volume levels for a much fuller sound.
- Headphone output with separate level control (again, NON-functional on this particular unit, #...0258)
- Indicator LED's for input selector
- 3 AC convenience outlets ( 2 switched 1 un-switched)

  
Kenwood C2 Original Specs:
  
 
Design type: 2 Channels, Analog operation
Frequency Response: 1-350kHz +0 / -3dB
Maximum Output Level: 1V
THD: 0.001% at full rated power
Phono MM Sensitivity: 2.5mV for 5.0V output @ 1kHz
Phono MM Maximum Input Level: 200mV
Phono MC Input Impedance: Selectable
S/N on Phono MM w/ 5mv signal: 94dB
Phono Capacitance: Selectable
High Level Sensitivity (tuner, Aux, Tape): 150mV

  
The Kenwood C2 has always been one of our favorite pre-amps under $600-$800. It's simply hard to beat for specs, features and performance. That is also evidenced by the fact that it was current in Kenwood's lineup, as their upper end pre, for almost half a decade. Again, we have completely gone through the unit cleaning all contacts, pots, switches and controls. All functions (again, with the exception of the 'Balance' control') test as original. Unit looks and sounds great! Unit measures 17.25" wide x 3" tall x 13" deep and weighs 10 lbs unpacked. Comes with original owners manual and includes our 90 day limited warranty.
KENWOOD BASIC C2
Condition 7 (due to balance control, headphone amp and Hi-Filter issues)

SOLD 1/30/20
SHIPPING TO STEVE IN OHIO


(Above text, in it's entirety, property of www.oaktreevintage.com / Oak Tree Enterprises, LLC. See 'Copyright Information' page for details)


 

 

 

    

          NEW ADDITION 1/22/19
(Click on above thumbnails to enlarge photos)
CheckMarkSmall_web.jpg (792 bytes) warranty
REFURBISHED / FULLY SERVICED & WARRANTED 
PRE-APPRECIATED KENWOOD POWER AMPLIFIER
KENWOOD KM-106 / KM106 POWER AMP (same as KM-105 with different graphics)
'Military Market' / PX UNIT

500 WATT MONSTER!!!
#...1149
Circa 1985-86
MIJ

SOLD 1/30/20
SHIPPING TO STEVE IN OHIO


  Our technician has completely gone through and 'Certified' this unit.

  Unit bench checked / tested.

  Amp has been cleaned inside and out.

  Face removed, meter illumination lens removed, cleaned and reattached.

  All new panel illumination lamps replaced with new.

  All functions have been tested and pass with flying colors!

Amp designed using Huge Power Supply Transformer and oversized, vertical finned heat sink for very efficient and silent, passive cooling of output devices. All inputs tested and both side produces clean and even sine waves! No power supply hum of any kind. It's dead silent! Following restoration procedures, we burned it in, in the shop at continuous volume for 48 hours straight and it functioned flawlessly.
   

While this amp is originally rated at 125 Watts with both channels driven (250W + 250W "Peak Music Power"), on our test bench, this particular unit's (#...1149) amplifiers produced 38 Volts at 8 Ohms per channel for 180 Watts / channel and 33 Volts at 4 Ohms per channel for 272 Watts / channel via discrete output transistors (2x Sanken 2SA1215 & 2x 2SC2921. (Idle AC current draw @ .4A.
Floor noise measured at L= 00.0mVAC and R=00.0mVAC / -60dBm) 
   

Great, later model power amp by Kenwood. Model KM-106. HUGE power output! Excellent for 2-channel (stereo) audio listening or for use in an A/V system. Lots of punch and headroom.

Kenwood KM-106 Features:
   

- Old Skoool Class A/B amplifier design (NO Digital here!)
- 2- Channel stereo operation
- A or B speaker selector via high current relay
- Dual, Vertical, 7-Segment LED Power Output Meters with Dual Position Level Selector
- Built-in Protection circuit
- LED Status indicators
- Front-mounted 1/4" stereo headphone jack
- RCA input jacks
- Dual, vertical finned internal heat sink
- Oversize power supply transformer
- 3 Rear-mounted AC convenience outlets (2 switched and 1 un-switched for a total capacity of 200 Watts)

   
Kenwood KM-106 Original Specs:

 "125 Watts per channel minimum RMS, both channels driven @ 8ohms, 20-20k, with no more than 0.03% THD"
Design type:
2 Channels, AB operation
Damping Factor: >35 @ 50Hz / 8 ohms
Signal / Noise: 120dB A weighted
Rated RMS Output: 125 Watts per channel, min. RMS, @ 8Ω, both channels driven, from 20Hz to 20kHz.
Music Power 250 Watts + 250 Watts
THD:
0.03% at 'Full Rated Output'  / 8Ω w/ 20-20kHz
0.015% @ half rated power / 8Ω w/ 20-20kHz
0.002% @ half rated power / 8Ω w/ 1kHz
IMD: 0.002% @ rated power / 8Ω
Power Bandwidth: 10Hz-50kHz @ 0.03% THD @ 8Ω
Potential Frequency Response: 5Hz-200kHz
 

Again, as stated before, our technician has completely refurb'd this Kenwood KM-106, stereo Power-Amp, cleaning and testing all and it gets our full 'Certification'. Great 'all around' power amp for about any audio system. We have sold MANY of this series of Kenwood power amps over the past 2+ decades, with never a complaint. Includes an 'e-copy' pdf download of the Kenwood KM-106 owners / users / instruction manual. Unit looks, works and sounds great! Unit measures 16.5" wide x 10.5" deep x 4.75" high and weighs 18 lbs unpacked. Includes our standard 90 day limited warranty.
KENWOOD KM-106
Cond. 8.5++

SOLD 1/30/20
SHIPPING TO STEVE IN OHIO

(Above text, in it's entirety, property of www.oaktreevintage.com / Oak Tree Enterprises, LLC. See 'Copyright Information' page for details)

 

 



    
    



          NEW LISTING 1/8/19
(Click on above thumbnails to enlarge photos)
CheckMarkSmall_web.jpg (792 bytes) warranty
REFURBISHED / FULLY SERVICED & WARRANTED 
VINTAGE MITSUBISHI POWER AMPLIFIER
MITSUBISHI DA-A10DC STEREO POWER AMP
WITH ORIGINALLY OPTIONAL MITSUBISHI DA-M10 METER BRIDGE
TRUE DUAL POWER SUPPLIES
 ONE OWNER!
MIJ

SOLD 12/20/19
SHIPPED TO RICK IN INDIANA

DC-C20, DA-M10 & DA-A10DC
(see listing to the left for details on the 'Pre-amp / Tuner')


 Our technician has completely gone through and 'Certified' this unit.

 Much of amplifier disassembled, the everything cleaned inside and out including all switches, controls and contacts. Cleaned and re-lubed all control shafts.



 Internal fuses checked for correct value / function and replaced where necessary.



 Solder joints reflowed on all possible high heat and stress points

 Amplifier section had output bias and DC offset adjusted to spec levels after 10 min warm-up.



 Meter Lamps replaced with correct bulbs (8V / 200mA)



 Analog, VU / D'Arsonval Meters adjusted 'mechanically' for 'Zero' position, and electronically to match amp output.

 All functions tested for perfect operation.

 Following above procedures, unit was cosmetically detailed inside and out.

 All inputs tested and both sides produce clean and even sine waves into static 8 & 4 ohm loads! No power supply hum of any kind. It's dead silent!

 Following service / refurb procedures, the unit was run continuously at medium volume, as all our amplifier / receivers are, into a load with "Loudness" on and both Tone Controls at 10 for 48 hours.
Total restoration time investment 10.5+ hours. You will not be disappointed.

On our test bench, each internal amplifier of this particular unit, #...0128, produced peak power of 31.5 Volts per channel at 8 ohms for 124 Watts per channel and 27Volts at 4 ohms for 182 Watts per channel via discrete output transistors (2X Sanken 2SA908 & 2SC1585).
AC Idle current at 450mA. Floor noise > -60dBm.
 
____________________________


Performs and sounds fantastic! All inputs tested and both side produces clean and even sine waves! No power supply hum of any kind. It's dead silent! Following restoration procedures, we burned it in, in the shop for 48 hours and it functioned flawlessly (we actually took it into our 'demo' system and 'rocked-it' HARD on our Altec VOTT's. HUGE sound and thump).

This is a Huge and Beautiful looking, performing and sounding power amplifier. Great 'High-Tech' look (in 'vintage terms anyway). Cosmetically, it looks great with only a few minor 'dings / scratches', mostly not visible from the front. The minor scratches on the front are faint and fairly 'un-noticeable' (see photos above).
While it could be used with any other pre / control amp, as they came in as a pair from the original owner, we only want them to stay together to their 'new' owner.


Mitsubishi DA-A10DC / DA-M10 Features:

- True DUAL power supplies (has a lot to do with how much this amp 'punches'. (See photos above of power supply)
- Huge, Externally located, 'vertically finned' heat-sinks
- DC protection for 'Turn-On Surge' and 'Output'
- A and / or B speaker selector
- Front mounted 'Gain / Level' controls via the Meter option on the front. Power amp has input levels on the rear panel as well (slotted heads for screw-driver)
- Huge, Beautiful, Lit VU Power Output meters
- Meter Range selector for either normal or 'x 0.1'
- 'Thermal Indicators' located on heat-sinks (think "mood ring" technology)
- Signal inputs via standard RCA jacks
- Three-pin jack for 'Mitsubishi' connector cord to Mitsubishi Pre-amp speaker switch controller


Mitsubishi DA-A10DC Specifications:

Rated RMS Output: 100 Continuous Watts per channel, min. RMS, @ 8Ω, both channels driven, from 15Hz to 30kHz.
Power Bandwidth:
10Hz to 100kHz @ 8Ω, both channels driven
Signal to Noise Ratio: 107dB un-weighted (closed input), 122dB (20Hz to 20kHz) at full RMS output (closed input)
Total Harmonic Distortion (THD): <0.01% @ rated output, <0.005% @ half output
IMD: 0.008% @ rate
d power / 8Ω
Slew Rate:
30V/μsec @ 8 Ohms / 50V P-P
Damping Factor: 100 @ 8 Ohms / 20Hz to 20kH
Load Impedance: Rated for 16, 8 or 4
Ohm use
Input Impedance: 50k Ω nominal
Input Sensitivity: 1V for rated power into 8Ω
Channel Separation: 1
00 dB @ 1kHz and 80dB @ 20kHz
Input Connector: Standard RCA jacks

Again, as stated before, we have completely gone through this
Mitsubishi DA-A10DC
, Power Amplifier cleaning and testing all and it gets our full 'Certification'. This is an amazing performing and sounding amp. We have 'stood on it' hard, with a number of our speaker loads (the most fun being when connected to our Altec 'Voice of the Theaters'. It's a huge sounding and punchy amp, with lots of 'head room'. Handles 'REAL' high power levels perfectly well. If you are looking for serious, vintage power, it ain't gonna get much better than this.
Also includes the original 3-pin, umbilical speaker control cable for connecting the power amp to the speaker selection section of the pre-amp.

 Comes with an e-copy, pdf download, of the
Mitsubishi DA-A10DC Owners Manual and Service Manual.
Measures standard 17" wide x 15" depth x 6.75" tall and weighs 46 lbs unpacked. Total weight of all three components is 65 lbs. Includes our standard 90 day limited warranty.
Mitsubishi DA-A10DC Power Amplifier / DA-M10 Meter / Control panel.
 Cond. 8.5
+
all three components
SOLD 12/20/19
SHIPPED TO RICK IN INDIANA

DC-C20, DA-M10 & DA-A10DC
(see listing to the left for details on the 'Pre-amp / Tuner')

(Above text, in it's entirety, property of www.oaktreevintage.com / Oak Tree Enterprises, LLC. See 'Copyright Information' page for details)


 

 



    




          NEW LISTING 1/8/19
(Click on above thumbnails to enlarge photos)
CheckMarkSmall_web.jpg (792 bytes) warranty
REFURBISHED / FULLY SERVICED & WARRANTED 
VINTAGE MITSUBISHI STEREO PRE-AMPLIFIER / AM/FM TUNER
MITSUBISHI DA-C20
DUAL MONO CONSTRUCTION

 #...0324
Circa 1978-'80
MIJ

SOLD 12/20/19
SHIPPED TO RICK IN INDIANA

DC-C20, DA-M10 & DA-A10DC
(see listing to the right for details on the 'Power Amp / Meter bridge')


 
  Our technician has completely gone through and 'Certified' this unit.

 Following ext / int visual inspection entire unit was cleaned inside and out including all contacts, switches and controls (VERY difficult to access. Requires complete tear down to clean controls properly).



 Meters calibrated per service manual.

 Switches and controls now clean sounding and performing solidly.

 
 All functions tested for perfect operation.

 All inputs tested and both side produces clean and even sine waves!

 No power supply hum of any kind. It's dead silent!

 Following electronic refurb, entire unit was cosmetically detailed (as it 'practically' allowed).

 We also aligned the tuner front-end on both AM & FM bands for optimum performance as older tuner components will have 'drifted' over the years.

 AM 'Stick' ferrite core adjusted for optimum reception and minimal noise

 AM 'Stick' antenna 'ball and socket' inspected and is holding well.

Tuner string checked for any fraying then re-tensioned to increase traction & relieve flywheel binding and re-centered pointer to correct dial position.

 VERY GOOD TUNER! Generally AM reception in a stereo receiver is treated as an 'after thought', but the AM reception on this one is WAY above average. Pulls in stations like an old 'Tube' radio! FM reception also incredible and IMPECCABLY CLEAN!!!

 Following service / refurb procedures, the unit was ran continuously at medium volume, as all our amplifier / receivers are, into a 4 Ohm load with "Loudness" on and both Tone Controls at 10 for 48 hours.
Total restoration time investment
11+ hours. You will not be disappointed.

 
Very classy 'Pewter / Silver' face Mitsubishi Pre-Amp / Tuner. VERY impressive in stature and cosmetics. Looks great with matching Meter Bridge attached to Mitsubishi power amp. Cosmetically it's in BEAUTIFUL condition with only items worth mentioning would be some light finish scuffing on one end from being set on it's side (not visible from front of unit) and the word "Power" missing all but the "P" from the silk screening above power switch (see photos above).


Mitsubishi DC-C20 AM/FM Tuner / Pre-Amp Features and 'Creature Comforts' include:


-True Dual Channels w/ separate L & R Tone / Output levels
- Delay power On / Power Off sequencing when connected to power amplifier
- Speaker selector for A or B, A+B or Off (when connected to amplifier via proper umbilical cord)
- Subsonic filter with 18Hz cut-off built-in for cutting turntable rumble
- Super quality de-tented Attenuator (volume) control
- Separate L & R Tone Defeat for purest tone path if so desired
- Separate L & R Bass and Treble with high quality de-tented controls
- Pre-amp section 'Stereo / Mono' / Reverse Stereo selector
- Dual tape deck monitors (Tape Monitors can be used with Video / CD / DVD / VCR / DAT / MP3 / iPod / iPad / iPhone / iTouch / iGadget / MP3 / XM / SIRUS CDR (CD recorders as well as for inserting signal processors, such as EQ's, Reverbs, Spatial Enhancers / Dynamic Processors, Noise Reduction units, Special Effects units, Time Delays, etc)
- Bi-Directional Tape Duplication
- Dual Phono / Turntable inputs w/ 'Built-in' phono pre-amp for MM or MC
- Tuner input (may also be used for Video / CD / DVD / LD / VCR / DAT / MP3 / iPod / iPad / iPhone / iPod / iTouch / iGadget / eReader / MP3 / XM / SIRUS etc.)
- AUX input (may also be used for Video / CD / DVD / LD / VCR / DAT / MP3 / iPod / iPhone / iPod / iTouch / iGadget / eReader / MP3 / XM / SIRUS, audio mixers, computer sound-cards etc.)
- Analog / D'arsonval Signal Strength meter
- Analog / D'arsonval Center Tune meter
- Wide / Narrow Band selector for Tuner
- Tuner 'Lock' for drift-free reception
- FM Mute / Stereo / Mono selector
- Vertical and Horizontal Multi-path RCA outputs
- Front mounted 1/4" stereo headphone jack
- Side panel features full RCA patch bay for all inputs (each 'fastened separately' to the rear panel, and 'point to point' wired internally, instead of being soldered directly to the circuit board, which is always a 'failure point').
- 3-Pin connector for amplifier umbilical speaker connectors for A&B speakers

-
2 Switched and 1 un-switched AC outlets for a maximum load of 900 Watts of external gear.

 
Mitsubishi DC-C20 AM/FM Tuner / Pre-Amp Original Specifications:

TUNER SPECS:
Tuning Capacitor:
5-
gang
Tuning Range:
88-108MHz
Freq Response: 30-15kHz (FCC Limits)
Useable Sensitivity: Mono 11.2 dBf / 2.0 μV
Stereo 22.7 dBf / 7.5 μV
50dB Quieting Sensitivity: Mono 19.2 dBf / 5.0 μV
Stereo 39.2 dBf / 50 μV
S/N @ 65dBf: >80db Mono or 75dB Stereo
Capture Ratio @ 65dBf (Wide / Narrow): 0.8 dB / 1.5 dB
THD Mono @ 1kHz: 0.05% (Wide)
THD Stereo @ 1kHz: 0.08% (Wide)
FM Alternate Channel Selectivity (Wide / Narrow): 45dB / 75dB
Spurious Noise Ratio: 90dB
IF Response Ratio: 80dB
AM Suppression: (Wide / Narrow): 55dB / 50dB
Stereo Separation (Wide / Narrow): 45dB @ 1k & 35dB @ 10kHz / 40dB @ 1k & 30dB @ 10kHz
Subcarrier Product Product Ratio: 70dB
Image Response Ratio: 80dB
Antenna Impedance: 75 or 300 Ohms

TUNER SPECS FOR AM (IHF):
Tuning Range: AM Band 525 kHz-1605 kHz
S/N: 
>50db
Useable Sensitivity (IHF Bar Antenna): 45 dB
Selectivity: 30dB @ 1kHz
Hum & Noise: 50dB
THD: 0.8%
IF Response Ratio: 70dB
Image Response Ratio: 40dB


PRE-AMP SPECS:
S/N (IHF): 110dB for 'non-phono' inputs
THD: 0.003%
across 20-20kHz @ rated attenuator output of -20dB
Freq Response (non-phono inputs): 10Hz-100kHz at full rated power
Input Sensitivities 'non-phono' inputs for full rated output:
150mV / 50kΩ via RCA's
Output at Main Output: 1V for 'rated output' @ 600 Ohms
Output at Tape Monitors: 150mV / 600 Ohms via RCA's
Bass Control:  10dB @ 100Hz
Treble Control:  10dB @ 10kHz
Subsonic Filter:  -6dB / oct @ 18Hz

Output at Headphones: 600mV
(at output of 1V) / 15 Ohms. 650mV max.
 
Phono Section:

Freq Response: 20Hz-20kHz RIAA EQ
S/N: MM= 84dB (Shorted)
MC= 77dB (terminated w/ 47 Ohms)
Phono THD: MM= 0.003% @ 20-20kHz
MC= 0.005% @ 20-20kHz
Phono MM Sensitivity: 2.5mV / 50k Ohms / 10pF
Phono MC Sensitivity: 0.1mV / 10 Ohms
Phono Maximum Input Level: MM= 290mV RMS while still maintaining 0.1% THD @ 1kHz
MC= 12mV RMS while still maintaining 0.1% THD @ 1kHz

 
Again, as stated before, our technician has completely refurb'd this
Mitsubishi DC-C20 AM/FM Tuner / Pre-Amp
, cleaning and testing all and it gets our full 'Certification'. Entire unit, including the original brushed aluminum, Face and knobs are in beautiful condition. Unit looks beautiful and sounds great. This is the first 'complete combo' of these components we've had.
Comes with an 'e' copy / pdf download of the original Mitsubishi DC-C20 AM/FM Tuner / Pre-Amp users manual and service manual if purchaser so desires. Also includes the original 3-pin, umbilical speaker control cable for connecting the power amp to the speaker selection section of the pre-amp.

Measures 16.75" wide x 11.5" deep x 6.75" tall and weighs 19 lbs unpacked.
Total weight of all three components is 65 lbs. Includes our 90 day limited warranty!
Mitsubishi DC-C20 AM/FM Tuner / Pre-Amp

Cond. 8.5+++
all three components
SOLD 12/20/19
SHIPPED TO RICK IN INDIANA

DC-C20, DA-M10 & DA-A10DC
(see listing to the right for details on the 'Power Amp / Meter bridge')


(Above text, in it's entirety, property of www.oaktreevintage.com / Oak Tree Enterprises, LLC. See 'Copyright Information' page for details)


 
 



     


               NEW LISTING 1/11/19
(Click on above thumbnails to enlarge photos)
CheckMarkSmall_web.jpg (792 bytes) warranty
REFURBISHED / FULLY SERVICED / WARRANTED
VINTAGE PIONEER STEREO INTEGRATED AMPLIFIER
PIONEER SA-7500 / SA7500

MIJ
Circa 1976-78

SOLD 3/17/19
SHIPPED TO STEVE IN CONNECTICUT

 Our technician has completely gone through and 'Certified' this unit.

  Everything was cleaned inside and out including all switches, controls and contacts. Cleaned and re-lubed all control shafts.

 Internal fuses checked for correct value / function and replaced where necessary.

  Solder joints reflowed on all possible high heat and stress points

  Amplifier section had output bias and DC offset adjusted to spec levels after 10 min warm-up.

  All functions tested for perfect operation.

  Following above procedures, unit was cosmetically detailed inside and out.

 
Surface corrosion painstakingly removed from all RCA I/O jacks and binding post flanges