NEW LISTING 6/20/19
(click on above thumbnails to enlarge photos)
warranty
STEREO / QUADRAPHONIC
RESTORED / REFURBISHED / FULLY SERVICED
VINTAGE STEREO RECEIVER SANSUI QUADRAPHONIC / 4-CHANNEL / 2-CHANNEL STEREO RECEIVER
SANSUI QRX-4500 RECEIVER
#...0983
Circa 1973-75
"WORLD AC POWER" ™
M.I.J.
for sale

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

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

ü 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.

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

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

ü 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. 

ü All dial, indicator & meter lamps checked. Dial and meter lamps replaced w/ original spec 6.3V / 250mA.

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

ü Driver boards removed and had their 'edge connectors' burnished.

ü Amplifier section had output bias adjusted to service manual spec levels of on all four amplifiers.

ü DC offset adjusted to VERY LOW levels on all four amplifiers. NOW all 4 amplifiers have 'even' clipping on 'plus' and 'minus' rails.

ü 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.

ü 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-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'? 'Knobs per Dollar! You could also say it has very high 'MPD' and 'LPD' factors as well (you should be able to figure the meaning of 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.

Sansui QRX-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
- 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).
- Dual Aux inputs for both Front and Rear (may also be used for Video / CD / DVD /DAT / VCR / MP3 / iPod® / iPad® / iPhone® / iTouch® / iGadget / 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® / 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)
-  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
- Tuning D’Arsonval 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.

 - Triple AC outlets 1 switched / 2 un-switched
 - 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
- 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-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 / Decoder; Sansui '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

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; 125 Watts at rated
  
Again, as stated before, we have completely gone through this Sansui QRX-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 AND ACCESSORIES!!!
Comes with an 'e-copy / PDF download of the Sansui QRX-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 QRX-4500 STEREO RECEIVER
Cond. 9+++
$1199.

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

(Click on above thumbnails to enlarge photos)
 warranty
 SANSUI
 "Quad" 4-channel
           MODEL QR-4500 QR4500 
 STEREO RECEIVER
 "WORLD AC POWER" ™
 Circa 1979-81
 SOLD 11/24/04
  FOR SALE
 Beautiful Sansui 4-channel QR-4500 Receiver. Face is milled from a solid plank of Aluminum with matching milled aluminum knobs. Very elegant  design. Loaded with features:
 
 - Weighted flywheel analog tuning
 - Dual Tape inputs
 - Tape & AUX 4-channel inputs
 - Stereo / 4-channel mode
 - Built-in High & Lo filters
 - Loudness control
 - FM muting
 - FM Stereo / Mono selector
 - Front / Rear Separate Bass and Treble
 - Main & Remote speaker selector
 - A & B speaker selectors for both Front and Rear
 - CC-4 ready with optional adaptor
 - Built-in AM Ferrite Stick antenna
 - Front mounted 1/4" phono tape 2 inputs (redundant to rear inputs)
 - Front / Rear - Left and Right balance controls
 - Full length, externally mounted output heat sinks to keep heat out of unit
 -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 for use anywhere in the world. 
 
 We have completely gone through this unit cleaning all switches, contacts and controls as well as cleaning unit inside and polishing face, dial glass and knobs. All dial lamps  checked and / or replaced! All functions test perfectly. Total time invested in it's cleaning / refurb ~ 4 hours! 
 
 Units amplifiers produce 15.5 volts per channel at 8 ohms for 30 watts and 13 volts per channel at 4 ohms for 42 watts via discrete, NEC output devices.
 
  Looks near NEW and sounds GREAT! Very clean throughout including face plate and wood grain vinyl covered metal case! Measures 20.75" wide x 14.5"deep x 7.5" tall and weighs 41 lbs unpacked. Includes our standard 30 day limited warranty. 
 Sansui QR-4500
 Cond. 9
 $259.
 SOLD 11/24/04

    

 

dod 680

   

 

BEHRINGER HA4700

  

   



YAMAHA RX-120

  

  

PROTEUS 1-XR

   

    

HARMAN KARDON HK710
TUNER

CARVER TDR-1550


 

         

PIONEER SX-980

         

YAMAHA CR-2040

    

 

WESTERN ELECTRIC 'ROLL TOP DECK' PHONE

 

BUTCHER BLOCK 

REALISTIC STA-65C PARTS UNIT

(note: Vol caps NOT interchangeable with STA-120. The fader levers are too wide. Modification would be difficult)


 

       

DENON AVR-1709

  

PIONEER F-99X

    

MARANTZ SR6200-U2B

    

SONY STR-DH700

       

Sony STR-DE875

 

     

YAMAHA TX-70
MAY HAVE ALREADY BEEN SOLD???

  

KEN-TECH T-2018 CLOCK

- 

(Click on above thumbnails to enlarge photos) 
PRE-OWNED
BUFFET CLARINET
MODEL B12
INTERMEDIATE STUDENT Bb CLARINET
for sale
This clarinet is modeled after the Famous Buffet Grenadilla wood clarinets from the 'old day's'. When I worked for a 'full-line' music store thru the 1990's, we would periodically have a 'vintage' Buffet come thru and they never hung around long once serviced for re-sale. It is what most clarinet players asked for. That and Yamaha's.  This is a Buffet B12 clarinet, again, designed after the 'vintage' horns for the student / beginner and into the intermediate market. The Buffet B12 clarinets are made from ABS resin with an appearance and sound similar to that of genuine Grenadilla wood. These models are lightweight, strong and easy to clean perfect for even very young players. The Buffet B12 model has a very attractive and traditional design with nickel-plated body rings, straight key work and a traditional bell ring. The body is buffed to give the appearance of wood. The nickel silver key work is cold forged and induction soldered, providing greater stability, precision and quality. The B12 model is mounted with double fish skin pads which ensure excellent sealing.

 Features:
- Nickel plated keys, body rings & plated bell rings
- 65mm barrel
- 14.65mm poly-cylindrical bore
- Arched key cups (same as R-13 model)
- Staggered trill keys (same as R-13 model)
- Blue Needle Springs
- Adjustable 3-position thumb rest
- Ergonomic key design: Improved playing comfort like that of a professional clarinet
- Pointed needle springs for quality key action
- Undercut tone holes for improved tone quality and faster response
- High quality Double fish skin pads enables air tightness and are long lasting
- Blow-molded, hard shell case

Mouthpiece Assembly with Ligature, Cap and Mouthpiece

-           Cork Grease

-           Cleaning Swab

This clarinet retails for $925.00 (US).

    



GEMINI XL-100

INFINITY ENTRA SUB TWO

  

Speaker Stack for restaurant

 

    

ADVENT MINI II INDOOR / OUTDOOR

     

NEW LISTING 10/23/12
 (click on above thumbnails to enlarge photos)
  warranty
 PRE-APPRECIATED
 INFINITY
 STEREO SPEAKERS
 STUDIO MONITORS SM-152 / SM152 

     

REALISTIC OPTIMUS-7
 

    

ADVENT LAURETE

             

PSB 1000




 

        

HEATHKIT TS-1630

      

(click on above thumbnails to enlarge photos) 
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)

 

   

     

 

 

(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)
  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-1600MK2 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
- ½-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 output—connects 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 3/19/18
(Click on above thumbnails to enlarge photos)
warranty
REFURBISHED / SERVICED
VINTAGE NAD STEREO INTEGRATED AMPLIFIER
NAD 3120
STEREO INTEGRATED AMP
"STABLE DOWN TO 2 Ohms!!!"
#...1893
Circa 1984-86
SOLD 4/6/18
SHIPPED TO JEFF IN MICHIGAN

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

ü  Following both internal and external visual inspection, the entire unit was cleaned out including all contacts, switches and controls. Switches now clean sounding and performing fine.

ü Silicone heat sink compound inspected for ‘suppleness’

ü We adjusted / set the Output section bias / DC offset to BETTER THAN factory spec (check our results below).

ü All functions tested for perfect operation.

ü All inputs and functions tested.

ü Both amplifier sides produce clean and even sine waves! No power supply hum of any kind. It's dead silent!

ü Following electronic refurbishing, the entire unit was cosmetically detailed

ü Following restoration 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.

While this amp was originally rated at 25 WPC on our test bench the internal amplifiers of this particular unit, #...1893, produced 19 Volts per channel at 8 Ohms for 45 Watts per channel and  16 Volts at 4 Ohms for 64 Watts per channel via discrete, outputs (2x RCA 2N3055 & MJ2955)
Idle current draw .2A
DC offset, while the NAD 3120 service manual specs anything less than "50mV", and we originally measured this one, #...1893 at over 44mV / Channel, following our bench service it's now at only <2.0mV!!! on either side.
Very quiet with Floor noise measured at >-60dBm / 0.1 mVAC.
   ____________________________
   
Great performing and 'classic' looking NAD 3120 Integrated Amplifier. Essentially a more 'pure' version of it's predecessor, the 3120, in that they removed the 'tone control' circuit, and the LED power display.
Amazing sounding integrated power amplifier to provide the heart of a smaller to medium sized Hi-Fi system or 'project recording studio'. Unit looks, works and sounds great!

From the original Brochure,
"Designed for Real-World Performance: Specification tables and magazine test reports confirm that virtually all modern amplifiers measure well in the lab, with impressive figures for parameters such as the power output at 8 Ohms and the S/N with a shorted phono input.  But outside of the lab, amps are not all equal.
At home you don't listen to signal generators, short-circuits or 8-Ohm test resistor loads. you listen to complex and dynamic musical waveforms, generated by phono cartridges and reproduced through loudspeakers whose true impedance is rarely stable at only 8 Ohms.  So, rather than incorporating costly refinements that yield little or no audible benefit, NAD's "real world" approach to product design is focused on obtaining optimum performance under the conditions of everyday use....
Instead of the usual low-cost IC, the phono preamplifier section is a newly designed, discrete transistor circuit whose performance matches that of far more expensive preamp systems.  It interfaces correctly with the 'high impedance' of many magnetic pickup cartridges: it's RIAA equalization is precise: and it is virtually 'distortion-less'- not only with simple 'sine-wave' test tones, but also with dynamic, 'musical waveforms', 30dB above average level.  It's signal / noise ratio is close to the theoretical limit, not only with the short-circuit input that is often used for specifications, but also when a cartridge is connected.  It's total dynamic range is approximately 106dB."

NAD 3120 Features include:
  
- Discrete Output, Class A-B Amplifier design 
- Impedance selector for either 8 or 4 Ohms speakers, which means that you can get 100% of the potential power into just one pair of 8 Ohm speakers. (most amplifiers do not deliver more than 50 to 70% of their 'potential' power unless connected to a 4 Ohm load. This is BIG DEAL!)
- Pre-Out / Main-In loop
- I/O jacks and Speaker output posts feature 'Point to Point' wiring, so connections are 'stress free' on the circuit boards (all gear should be designed like this, but its 'too expensive' for most of the general public now
- 'Speaker / Tweeter Saving' "Soft Clipping" (defeatable if listener desires or to do 'bench testing')
- 'TRUE' Tape monitor (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)
- Phono / Turntable input
- 'Moving Coil' or 'Moving Magnet' cartridge selector (which means there is a 'head amp' for MC built-in. That alone is worth quite a lot of $$$)
- Tuner input (can also be used for ( Video / CD / DVD / VCR / DAT / MP3 / iPod® / iPhone® / iTouch® / iGadget / MP3 / XM® / SIRUS® etc. inputs)
- Loudness control. "Loudness" functions to boost Bass and Treble in relationship to Mid frequencies at lower volume levels for a much fuller sound
-  Heavy duty, 'Binding / Banana' post speaker outputs
- 1/4" stereo headphone jack
- Dual AC Convenience outlets (1 switched and 1 un-switched) with a total capacity of 250 Watts

NAD 3120 Specifications:
   
POWER AMP SECTION:
Design type: 2 Channel, discrete output, Class A-B
Dynamic Headroom at 8 Ohms: +3.0dB
Freq Response of power amp section at "LAB" input: 10Hz-70kHz
Damping factor: 45 @ 8Ω full bandwidth (means VERY TIGHT bass response)
Input Impedance: 11kΩ
Input impedance at "LAB" input: 22kOhms
Input Sensitivity (for 1W & rated output @ 8Ohms): 1V / 200mV
Cont 'minimum' rated Power: 2x 25 Watts @ 8 Ohms / 20Hz-20kHz
IHF 'Dynamic' Power (max 'short term' power / channel:
2x 50 Watts @ 8 Ohms
 2x 55 Watts @ 4 Ohms
 2x 70 Watts @ 2 Ohms
THD: 0.02% @ 25 Watts & 8 Ohms from 20-20kHz

PRE-AMP SECTION:
Signal / Noise:  90dB @ Tuner / AUX / Tape 'shorted'
Input Sensitivity Tuner / AUX / Tape @ RCA's (for 1W output): 180mV
THD: 0.020% at rated ouput
Loudness Control: +5dB @ 100Hz & +5dB @ 10kHz(-40dB VOL)
Max Input Signal: >25V
Input impedance (R/C): 47kOhms / 200 pF

PHONO SECTION SPECS:
Freq Response (RIAA curve): 20-20kHz ±0.5dB
S/N  (A-weighted w/ cart connected): >75dB!!! w/ 5mV & >73dB!!! w/ 0.5mV
Input Sensitivity @ 1kHz: 2.7mV MM / 180uV MC
Input impedance (R/C): 47kOhms / 100 pF
 
Again, as stated before, our technician has completely refurb'd this NAD 3120 Stereo Integrated amplifier, cleaning and testing all and it gets our full 'Certification'. All functions test perfectly. Great integrated for just about any stereo system from smaller to medium sized speakers. As there's no tone controls, this would also make a great amplifier for a 'project / home recording studio'. This is a fabulous amp. Sonically superb following our techs work. Very musical. Lots of solid power / punch. Unit looks good and sounds great! Can include a pdf 'e' copy of the NAD 3120 Flyer and / or Service Manual if the new owner so desires. Measures 16.5" wide x 10.25" deep x 4" tall and weighs 12 lbs unpacked. Includes our 90 day limited warranty.
NAD 3120 Stereo Integrated amplifier
Condition 8.5++
(C) R.R.
SOLD 4/6/18
SHIPPED TO JEFF IN MICHIGAN

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

 

     

NEW LISTING 4/13/18
 (Click on above thumbnails to enlarge photos)
  warranty
VINTAGE REALISTIC STEREO INTEGRATED AMPLIFIER
REALISTIC SA-2000
 #...1087
Circa 1977
MADE IN JAPAN
(Not Taiwan or Korea like a lot of 'vintage' Realistic gear)
for sale
SOLD 5/25/18
SHIPPING TO STEVE IN CONNECTICUT

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

ü Following ext / int visual inspection entire unit was cleaned inside and out

ü All three 'control' PCB's removed to allow cleaning of ALL contacts, switches and control pots.

ü Bias adjusted to correct spec.

ü Switches and controls now clean sounding and performing solidly
(only exception is the 'High Filter'. It's 'lock' is a bit 'finicky' so if you want to 'bypass' the Hi-Filter, you need to engage it rather 'solidly' to get it to lock (stay in) ).

 ü All functions tested for perfect operation.

ü All inputs tested and both side produces clean and even sine waves!

ü No power supply hum of any kind. It's dead silent!

ü Following electronic refurb, entire unit was cosmetically detailed (It's BEAUTIFUL!!!).

This is first and only one Realistic SA-2000 we've had in 23 years. Classic brushed aluminum face plate with the original aluminum knobs.  Following 12+ hours of restoration 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 technician time to restore 8 hours. (Tech noted on work sheet, "VERY nice build quality inside and out. Mint condition")
     
On our test bench the internal amplifiers of this particular unit, #...1087, produced 24 Volts per channel at 8 Ohms for 72 Watts per channel and 20 Volts at 4 Ohms for 100 Watts per channel via discrete, TO-3 / Metal Cased outputs (Toshiba 2SD426) (test at 1kHz, single channel at a time).
Idle current draw 0.425A.
Very quiet with Floor noise measured at <00.0 mVAC /->60dBm.
    ____________________________
 
Probably the best Integrated amp Realistic ever did (certainly was up until 1977, and after 1980, who cares). This is a great looking unit, with a classy 'Champaign' color, brushed aluminum face, and a 'REAL' wood veneer bonnet.
Just the right features & sonically magnificent! Great amp for home or project recording studio use.

Realistic SA-2000 Integrated Amplifier Features and 'Creature Comforts' include:

- Discrete output power amplifier section
- "Perfect Loudness" control couples 'gain' and 'Volume' controls allow you to adjust loudness compensation to your exact preference (similar to Yamaha's Variable Loudness).
- Speaker selector for Main or Remote, A+B or Off 
- Separate Bass, Mid and Treble with high quality de-tented controls
- Selectable Tone Control turnover centers
Low-Freq: 400Hz or 125Hz
Hi-Freq: 3kHz or 7kHz
- "Perfect Loudness" function w/ 'Variable Preset Level' (boosts EQ on Bass and Treble, while cutting mids for a fuller sound at lower volume levels in relationship with the 'Volume' controls)
- Dual Analog, back lit, 'd'Arsonval' movement, VU Power Meters
- 'Stereo / Mono'  selector
- Built-in Low / Subsonic Filter to eliminate excess rumble from sources such as turntables
- Hi filter for reducing tape hiss / electronic hiss & noise- and record static
- Dual Tape Monitor Loops (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)
- Dual 'Magnetic' Phono / Turntable inputs w/ 'Built-in' phono pre-amp
- 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.)
- Front mounted 1/4" stereo headphone jack
- Back 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').
- 'Screw Type' speaker connectors for A&B speakers (also gives a pair of RCA connectors for speakers)
- 1 Switched and 1 un-switched AC outlets for a maximum load of 300 Watts of external gear.
 
Realistic SA-2000 Original Specifications:
 
 "Continuous Power output of 55 Watts per channel @ 8 Ohms 20Hz to 20kHz @ <0.3%THD. Dynamic Power is much more!!!
 
Design type: 2 Channels, Integrated Pre /
Class AB operation Power Amplifier
Power Output: Continuous power output, 20Hz-20,000Hz:
55 W/Ch THD 0.3% @ 8 Ohms
Freq Response: 20Hz-20kHz at full rated power
S/N: 75dB @ AUX
Lo Filter: 70Hz
Hi Filter: 10kHz
 
Phono Section:
Freq Response: 20Hz-20kHz RIAA EQ
S/N: 60dB @ PHONO
Phono MM Sensitivity: 3mV
Phono Overload: 160mV

Again, as stated before, our technician has completely refurb'd this Realistic SA-2000 Integrated Stereo Amplifier, 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 with what the restoration tech called "Gutsy" power & punch!
Measures 16" wide x 12.5" deep x 4.75" tall and weighs 21 lbs unpacked. Includes our 90 day limited warranty!
REALISTIC SA-2000 INTEGRATED AMP
Cond. 9+
 (C)
R.R.
SOLD 5/25/18
SHIPPING TO STEVE IN CONNECTICUT

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

 

 

     

      NEW ADDITION 10/30/12
(click on above thumbnails to enlarge photos) 
warranty
CLASSIC & VERY EARLY FUKUIN ELECTRIC CO. / PIONEER HI-FI / STEREO SPEAKERS
PIONEER "TITAN IV"? SPEAKER
Circa 1960-61
for sale
Massive and VERY EARLY Pioneer 'Hi-Fi' speakers, direct from Japanese market. These appear to be original, factory built, Pioneer Titan IV speakers. The 1960 driver complement in these were typically offered in the US as 'kit' form (due to impracticality of SHIPPED such voluminous cabinets from Japan) but according to their consignor, these were brought over by a GI on military transport, so economics was not an issue. He purchased them originally in Japan. These are among the first drivers branded 'Pioneer' from the original parent company Fukuin Electric Co. The company changed it's name to Pioneer in 1960 or 61. There are probably less than an 'handful' of these in the US (if that) and probably only a few dozen in the world. If you want the rarest of the rare Pioneer speakers, here you go. These things are MONSTROUS!
"Hey, Go Big or Go Home!"
Their huge drivers are both efficient and seem to be power capable (handled our Hafler P225 well, but as always, be careful with irreplaceable 'vintage speakers).
Our speaker tech has completely gone through and 'Certified' these.
He has completely disassembled them further, testing all drivers independently. No material issues found with any of the drivers. Each was 'swept' with the AF generator while removed. All drivers were re-installed with the addition of gasketing material to further seal and eliminate any ‘flange to baffle’ rattles and buzzes. Attenuators removed and cleaned for ‘static free’ operation. Gasketing added to the attenuator plates prior to re-installation as well. We also 'modernized' the input connectors (gasketing also added to their mounting plates). Gasketing also installed on rear panel, prior to re-installation. He also installed new, height adjustable, leveling, 'glide' feet. Entire speaker system then swept with our AF generator from 20-5,000 Hz and feeding them with the output from our Hafler P-225 Pro Power Amp, looking for any irregular vibrations / anomalies in either the drivers. driver mounting, crossovers or cabinet structure integrity.  Next we auditioned them with our standard, 'abusive' demo / testing CD's / cuts running the gamut from Dire Straits, 'Brothers in Arms', TLC 'Fan Mail', Allison Kraus and Union Station, Nickelback, a digital recording of a cathedral pipe organ, our 'Usher Speaker' demo CD (no not that Usher), 'Friday Night in San Francisco', with Al Dimeola, John McLaughlin and Paco DeLucia, Nickel Creek's, "When in Rome" from the CD, "Why Should the Fire Die", Jennifer Warnes, "Famous Blue Raincoat", and a few others, all digitally recorded and some 'DDD'.
Very 'large' sounding cabs. I did prefer them with an EQ, but I know you 'purists' would 'cringe' at that idea.
 Pioneer Titan IV Speaker Features include:
 
- 3-way, Bass-Reflex design
- 12" Pioneer PW-30C, Cast Aluminum frame, Low Frequency' Driver (woofer) w/ vented Voice Coil and AlNiCo magnet / motor.
- 6" Pioneer PM-16B midrange 16 Ohms & AlNiCo magnet / motor.
- 3" x 2.5" Pioneer PT-6, 16 Ohms Horn Tweeter w/ AlNiCo magnet / motor.
- Infinitely variable L-Pad for Tweeter attenuation
- Pioneer DN-7 2-Way / 3-Way Crossover
- 11.5" x 8" Tuned Port

Pioneer Titan IV Speaker Specifications:

System Design: 3-Way, Bass Reflex
Driver Compliment: PW-30C 12", Cast Frame Woofer, PM-16B midrange / Squawker, PT-6 Horn Tweeter & DN-7 Crossover.
Frequency Response: ~35-20,000Hz
 Nominal Impedance: 16Ω
 Cross-over frequency: Pioneer DN-7 500Hz & 4kHz @ 12dB / Oct
Power rating: likely 25-40 Watts
 
The real wood, Mahogany veneer cabinets in INCREDIBLE shape, as are the original grills. They are virtually blemish / mark free and look like they could still be on the original show room floor. The cabinets have just had a fresh coat Howards 'Restore-a-Finish' and 'Feed-n-Wax' rubbed in to bring out their original luster. Again, our speaker tech has completely refurbished, tested and Certified these speakers performing the previously mentioned processes.
 Great speaker for a lower powered 'vintage' Hi-Fi system, or that low wattage or 'single ended' tube amplifier. They look, work and sound great! Cabinets measure 38" H x 27.25" W x 17.75" D and weighs a hefty 90 lbs each (due to their huge size once packed, the P,S & I on these to much of the lower 48 states of the US would run approx $450-$650. Locations such as North Eastern States, North Western Washington or Southern Fla would run more). Includes our standard 90 day limited warranty (excluding problems due to under / over powering.
Pioneer Titan IV? Vintage Hi-Fi speakers
Cond. 8.5++
$1899. pr. with grills
(Cons.) R.R.


(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 11/19/10
(Click on above thumbnails to enlarge photos)
warranty
RESTORED / REFURBISHED / FULLY SERVICED
VINTAGE ESB STEREO SPEAKERS
ESB 7/08 HOME AUDIO SPEAKERS
#...7400 / 7401
  Circa 1984-86
MADE IN ITALY
  for sale
 There aren't many ESB's in North America, as they were imported in limited quantities from Italy, where they comprised approx 25% of the speaker market!
 ESB (ELECTROACOUSTIC SYSTEMS BUILDING)  They are an impressive speaker in design, build quality, construction and sonics. Their detailed and balanced sonics are accomplished via a couple of design characteristics. One is the 'coupled' Midrange and Tweeter design. The other would be the a radical modification of Horizontal and Vertical alignment. From a 1984 review,
"A key element in the design of all the Series 7 speakers is what ESB calls DSR (for "distributed spectrum radiation"). which is intended to maintain accurate, consistent stereo imaging over a wide listening area. Vertically, this is achieved first by building the mid- and hi-frequency drivers on a single mounting flange, minimizing the distance (and therefore the interference) between them, so that they act as nearly as possible like a single point source... The method ESB uses to stabilize the image horizontally is a refinement of a familiar technique. 'Toeing in' a pair of speakers so that their forward radiating axis cross slightly in front of the listening position usually broadens the area in which you can sit without the stereo image collapsing into the speaker nearer to you."

These are great performing speakers for most any genre of music. We extensively tested them with our barrage of material. They were very balanced and handled power well. Probably not a speaker for every week party's, but for a great 'large' sound, you'll love them. These are in beautiful physical condition as well.
Features include:
  
- 3-Way, Acoustic Suspension / Infinite Baffle cabinet design
- Asymmetrical / Mirror image cabinets w/ angled high-frequency baffle
- 10" Woofer with fresh foam surrounds (were re-foamed prior to their arrival to our shop. The tech utilized 'Cerwin-Vega' surrounds, which are 'red' in color, then 'blackened' them, with questionable success. Sound and perform fine, but noticeable cosmetically)
- 2" Hemispherical 'coated' silk dome midrange w/ heavy duty motor 'coupled' to tweeter plate
- 1" Hemispherical 'coated' silk dome tweeter w/ heavy duty motor 'coupled' to mid plate
- Heavy duty, Banana / Binding Post speaker input terminals
- Externally located, independent, glass fuse protection for all 3 drivers
- Incredibly well built crossover.
- Heavy build, 'acoustically solid' cabinets
  
Specifications:
  
System Design:  3-Way, Infinite Baffle / Acoustic Suspension
Frequency Response:  45Hz- 20kHz ±3dB
Crossover points: 600Hz & 6,000Hz
Sensitivity: 87dB @ 1W, 1m
System impedance: 6 ohm nom / 5 Ohms min.
Recommended Amplifier rating: 40 Watts minimum, and were originally tested when current with 300Hz bursts at 500 Watts

Our speaker tech has completely gone through and 'Certified' these. The surrounds were recently replaced with 'Cerwin Vega' 'Red' foam, that was 'stained' black, prior to arriving to us. We have completely tested them with both recorded material, PN 20-20k and swept them with our AF generator from 20-5,000Hz and feeding them with the output from our Hafler P-225 Pro Power Amp. Then further auditioned with a myriad of our difficult to reproduce 'test' CD's.
 The real wood veneer, cabinets in beautiful shape with no serious 'battle scars'. Have been given a coat of Howards 'Restore a Finish' then buffed w/ 'Feed-n-Wax'. With the exception of one missing logo, the original black knit grills are in great shape and the original frames are structurally sound.
Again, these are great looking and sounding speakers and would be happy coupled with most any medium to large receiver / amp. Cabinets measures 37.5" high x 15" wide x 11" deep and weighs a hefty 55 lbs each. Includes our standard 90 day limited warranty (excluding problems due to under / over powering).
ESB 7/08 STEREO SPEAKERS
  Cond. 8.5
$1199. pr. with grills
(Cons.) M.R.

(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 12/29/17
 (Click on above thumbnails to enlarge photos)
  warranty
VINTAGE AND FULLY SERVICED
TEAC CASSETTE TAPE DECK
HUGE
TEAC CX-650R
AUTO-REVERSE W/ 'BI-DIRECTIONAL RECORDING'
#...7598
With DOLBY NR
MADE IN JAPAN!
Circa 1980-82
SOLD 1/17/18
SHIPPING TO CALIFORNIA

ü Our technician has completely and EXTENSIVELY gone through and 'Certified' this unit which involves complete removal and disassembly of the entire transport (not an easy task on this deck), cleaning inside and out, DISASSEMBLING, cleaning and re-lubricating all internal mechanisms and the balance of efforts listed below.

ü Heads inspected for excessive wear (obviously we do this 'early on' as 'excessive' wear will usually negate any further restoration work).

ü Head rotating gear inspected with a jewelers loop prior to starting any restoration work, and found to be 'hairline' crack free.

ü Capstan motor spindle bushing re-lubed

ü Capstan burnished

ü Internal 23VDC power supply tested to 23.2Volts

ü 2X NEW, Custom made, 'reel drive' tires installed for years of trouble-free service. (These are actually much more important to replace on this deck (and most) than the belts. Without these, the deck won't fast wind very well, and will likely 'eat tapes' as the 'take-up' reel won't turn properly)

ü All new internal Drive and Counter belts installed for trouble-free service.

ü Rubber pinch rollers have been reconditioned

ü Both Flywheel 'belt surfaces' solvent cleaned

ü Bronze Flywheel bushings solvent cleaned

ü Both Flywheel thrust pads cleaned

ü Entire flywheel assemblies re-lubed upon re-assembly

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

ü Head alignments and azimuth at both 1kHz and 10kHz adjusted for BOTH directions for 'peak performance' with O-Scope

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

ü Both spindles in perfect alignment.

ü FF, REW, & Play transport functions all test perfectly and controls tested for 'positive / accurate' responsive.

ü 'Silicone Damped' Eject door operates smoothly.

ü Tape Counter Function tested

ü Dolby NR circuits / function tested

ü 'Memory / Zero Return' function tested

ü Heads are in great condition

ü Internal playback levels adjusted for even playback w/ alignment tape, Oscilloscope, and mVAC meter

ü Playback meters adjusted for 'playback' zero'd with factory test tone tape.

ü Internal Record amplifier channels adjusted for 'even output'

ü Pinch roller and heads all in GREAT condition!!!

ü Overall floor noise measured at >-60dB.

üSpeed adjusted internally to 100% accuracy BOTH directions, with 1kHz factory calibration tape and frequency counter (meaning 1kHz calibration tape plays back at 1000Hz +/- 1Hz)

ü Cosmetically, the deck and the 'wood grain wrapped' case / cabinet looks NEAR NEW!

ü Plays great and after adjustment, records AMAZINGLY well w/ following results;
With Pink Noise recorded at 0dB w/o Dolby engaged; -2dB on Maxell UDXL-II / High Bias tapes
With 1kHz recorded at 0dB with Dolby engaged; -0.3dB on Maxell UR (normal bias) tapes
With 'ddd' CD recorded at 0dB with Dolby engaged; -2dB on Maxell UDXL-II / High Bias tapes
With 'ddd' CD recorded at 0dB with Dolby engaged; -1.5dB on Maxell UR (normal bias) tapes
With 'ddd' CD recorded at 0dB w/oDolby engaged; -3dB on Maxell UR (normal bias) tapes

Bottom line is this deck sounds amazing for playback or recording (always make sure you're playing back 'good quality' tape recordings)
Total technician time to restore 10+ HOURS!
____________________________

The Teac CX-650R, Auto-Reverse with 'Bi-Directional Recording', Stereo Cassette Tape Deck. Great deck for doing your tape transfers if your tapes were recorded with no NR or with "Dolby B" or for making some awesome 'new' recordings or 'mix tapes' (hey, it's 'the thing' again). This deck is a pleasure to use, and has a great 'feel' due to it's size and transport function. As far as cosmetics, it's BEAUTIFUL. Was taken very good care of before it came to us, and is even more astounding now. The deck and the wood grain case could convince you that time had rolled back almost 40 years, and you were seeing it at the original store's retail display.

Teac CX-650R Features include:
  
- Heavy duty transport featuring 'oversized' capstan motor, and VERY large, 'asymmetrical' flywheels
- Triple-Mode Auto-Reverse, with 'Bi-Directional' Recording (not just 'A' side recording!)
-  "Soft touch-control" tape transport
- Selector for Normal (EX / I), CrO2 (SX / II) & Metal (ZX / IV) Tape Type
- 3-Position Selector for Tape Equalization for Normal (EX / I), CrO2 (SX / II) & Metal (ZX / IV) Tape Type on playback
- Dual Analog VU Level Meters
- Analog counter 
- Built-in MPX filter for killing the 19kHz pilot tone in FM transmissions
- Variable Output Level control (one of the most important features on a deck in our opinion)
- Dolby B NR
- Record Muting
- 'Auto-Space' records a 4-second space prior to 'stop' when engaged.
- Real 'Potentiometer' Record level controls that are 'gear coupled' (meaning when you turn one, the other one responds as well. They can be turned independently for 'fine adjustment' as they're 'clutch coupled' as well)
- Memory Stop / Repeat for counter
- Dual, Front mounted, 1/4", Microphone Jacks
- Front mounted, 1/4", Stereo Headphone jack
- Timer Play / Record function.
- Multi-pin port on rear panel for optional wired remote, TEAC RC-100 (remote not included)

Teac CX-650R Specifications:
 
Track format: 4 track / 2 channel
Motors: 2x 1x DC Coreless 'Reel', & 1x FG Servo Controlled DC 'Capstan'
Freq Response; 30-18,000Hz +/- 3db w/ Metal Tape @ -20dB
30-18,000Hz +/- 3db w/ CrO2 Tape @ -20dB
30-15,000Hz +/- 3db w/ 'Normal' Tape @ -20dB
Wow & Flutter (WRMS): 0.06% wtd
Tape Speed: 1-7/8 ips
Harmonic Distortion / THD: <3.0% @ 1kHz & 0dB (High Bias Tapes)
S/N ratio w/ CrO2 tape: >56db w/ Dolby dis-engaged (and Normal Bias Tapes)
>66db w/ Dolby-B engaged (over 10kHz and High Bias Tapes)
Line Input 'Nominal': 60mV @ 50K Ohms
Line Output 'Nominal': 300mV for a load impedance of 50k Ohms
Headphones Output: 1.0mW @ 8 Ohms
Fast Wind Time: ~80 Seconds for C-60 tape
  
Again, we have completely cleaned, refurbished / serviced and thoroughly tested this Teac CX-650R cassette tape deck.
Great for transferring your no NR or Dolby B NR encoded tape collection to CD, Hard-drive or MP3 especially with the 'Tape EQ' selector for 'fine tuning' older tapes. Built very well! Looks like new, works perfectly and sounds fabulous. Due to it's size, overall feel, the 'input controls' and the 'transport control' this deck really is a blast to use. Comes with an 'e-copy / pdf download' of the TEAC CX-650R cassette tape deck owners / users / instruction manual. Measures 18.5" wide x 13.5" deep x 7" tall and weighs a VERY HEAVY 26 lbs unpacked. Just incase you 'too casually' read past that last little bit,
IT'S A TWENTY-SIX POUND CASSETTE DECK!
Includes our standard 90 day limited warranty. 
TEAC CX-650R
Cond. 8.5+
SOLD 1/17/18
SHIPPING TO CALIFORNIA

(tape shown in photos not included. We do ship our decks with a  a 'pre-recorded' tape for playback, made on this 'specific' deck, and a tape to 'practice record' on.) 

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

    

NEW LISTING 4/4/18
 (Click on above thumbnails to enlarge photos) 
  warranty
VINTAGE AND FULLY SERVICED
MARANTZ CASSETTE TAPE DECK
MARANTZ 5220
WITH 4-CHANNEL 'MIXING' CAPABILITY
AND DOLBY NR
FROM THE CLASSIC AND SOUGHT AFTER
'BLUE FACE' MARANTZ
SERIES
USA'S "BICENTENNIAL" YEAR
#...08J4
Circa early 1976-77
Made in Japan
SOLD 4/23/18
SHIPPING TO CALIFORNIA

ü Our technician has completely and EXTENSIVELY gone through and 'Certified' this unit which involves complete disassembly of the transport, cleaning inside and out, COMPLETELY DISASSEMBLING, cleaning and re-lubricating all internal mechanisms and the balance of efforts listed below.

ü Heads inspected for excessive wear (obviously we do this 'early on' as 'excessive' wear will usually negate any further restoration work).

ü All drive tires reconditioned for trouble-free service.

ü All new internal rubber belts replaced for trouble-free service. (a note about the 'belt kits' out there. We were out of a couple of the belts we needed, so to make it easy / quick, we thought we'd order a 'belt kit' from an ebay seller (yes, we should know better). We installed them, and went on with the restoration. At the first opportunity to do some testing during it's 'bench time', we noticed 'fast' WOW / 'slow' Flutter when recording test tones (especially prevalent with recording, then playing back 'Piano' music). After spending 'hours' trying to track down the issues, and in the interim we had 're-stocked' our normal belts, changed out the ebay purchased ones for our 'stock' units, and the problem was solved. That seller was selling 'round' belts ("round belts" typically shouldn't be an issue), but the Marantz 5220 deck MUST have 'Square' belts. Just FYI (at our expense).)

ü Rubber pinch roller reconditioned

ü Capstan burnished

ü Missing Capstan thrust screw replaced

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

ü Head alignments and azimuth checked and adjusted as necessary for 'peak performance' with O-Scope

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

ü All internal light bulbs changed

ü All internal displays and LED's working fine.

ü Both hub spindles in perfect alignment.

ü FF, REW, & Play transport functions all test perfectly and controls tested for 'positive / accurate' responsive.

ü Heads in great shape as well, with many years of performance left in them and head alignment / azimuth has been checked for peak performance.

ü Both Internal playback amplifier channels adjusted for 'even output'

ü Meters adjusted to even zero with symmetric input.

ü Both Internal Record amplifier channels adjusted for 'even output'

ü Pinch roller and heads all in GREAT condition!!!

ü Playback meters zero with factory test tone tape.

ü Tape Counter and 'Memory' Function tested

ü Plays perfectly and records well @ ~0dB (with Maxell UDXL-II tapes @ 1kHz) and @ ~-2.5dB (with TDK D tapes with Pink Noise)( 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).

ü Pinch roller and heads all in GREAT condition!!! -Both level meters playback even.

ü Speed adjusted internally to 100% accuracy with 1kHz factory test tape (meaning 1kHz calibration tape plays back at 1000Hz +/- 1Hz)

Face is made of beautiful brushed aluminum, and overall the deck is in fabulous cosmetic condition. Following the extensive restoration, we did 'test recordings' of a 'ddd' CD on 6 tapes; Sony Normal Bias, Fuji Normal Bias, TDK Normal Bias, Maxell Normal Bias, TDK 'SA' High Bias, and Maxell 'XL-II' High Bias. We found that TDK 'D' / Normal Bias tape performed the best on this particular deck.
 Total technician time to restore ~16 HOURS! (12 Hours Tech time, then another 3-4 hours testing / evaluating)
  ____________________________
  
From Marantz's Classic and always sought after, 'Blue Face' years. This is the first of Marantz cassette deck from this series that we've had make it through our process in over 21 years, and it was a 'long journey'. Marantz only made 3 'vertical' models of cassette decks, with the 'Smoked Plexi' look. The 5020 (lesser model), the 5200 (same as this deck, but without Dolby), and this 'Top of the Line' 2-Track, 5220! Mid-70's cassette deck with classic, Piano-Key transport operation, Dolby, stereo cassette tape deck. Great deck to add to your classic, brushed silver and 'Blue Face' Marantz 'stack or rack'.

Marantz 5220 Features include:
  
- Super Hard, 'Ferrite' heads
- Classic 'Piano Key' transport operation
- 4-Input Channel 'Mixing' capability (Allows both Microphone inputs and both 'Line Level' inputs to be mixed ALL AT ONCE to tape, or simply out to your speakers)
- DC Servo Motor
- Dolby-B noise reduction built-in for recording and playback
- 3-Position Tape Bias Type / EQ selector for Normal, Fe-CO2, & CrO2 tape
- Selectable, Automatic record level 'Limiter' built-in
- Peak LED indicator
- Dual, Blue back-lit, Analog VU signal level meters
- Manual Record Level with independent L&R control + 'Master' Level control
- Separate, L&R, Variable Output Level controls (located on rear panel)
- MPX Filter, for eliminating the 19kHz 'pilot' signal from FM broadcasts. You can use this while recording, or as a ' Listening filter all the time' by putting the deck into 'Record Pause'. (located on rear panel)
- FM Deemphasis for either 'Flat' or 25μSec
- Separate, L&R, Variable Play / FM Calibration (for utilizing this deck as an external 'Dolby' processor for another deck that is lacking Dolby)
- Dual front mounted 1/4" mic input jacks
- Front mounted Stereo Headphone jack
- Analog Tape Counter
- Selectable 'Memory' point

Marantz 5220 Specifications:

Track format: 4 track / 2 channel
Motors: High Torque, DC Servo motor
Freq Response: w/ Ferri-Chrome; 35-17,000 Hz +/- 3dB @ -20dB
w/ Chrome / CrO2; 35-15,000 Hz +/- 3dB @ -20dB
Wow & Flutter (WRMS): 0.08% WRMS
S/N ratio w/ Dolby 'OFF': 50dB w/ 'non-normal bias' tape
                            48dB w/ 'normal bias' tape
Dolby engaged improves S/N by 3%
Harmonic Distortion (THD):  <3% @ 0dB
Line Input Impedance: 100k Ohms
Microphone Input Impedance: 10k Ohms
Output Level: 900mV @ 6k Ohms

There's just something about the feel of 'original piano key' tape transports.
Again, we have completely refurbished and thoroughly tested this deck, with multiple recording tests (as stated previously). Cosmetically, it's in essentially NEW condition! Great deck for just about any system, but especially 'great' for cosmetically matching to an existing, Marantz 'Blue Face' stereo system. Also great for transferring your tape collection to CD, Hard-drive or MP3. Includes original box and packing. Comes with an 'e-copy' / pdf of the Marantz 5220 owners manual.
Measures 17.25" wide x 13" deep x 6" tall and weighs 20 lbs unpacked. Comes with our 90 day limited warranty.
RESTORED / REFURBISHED / SERVICED MARANTZ 5220
Cond. 8.5+++
SOLD 4/23/18
SHIPPING TO CALIFORNIA

(tape shown in photos not included. We do ship our decks with a  a 'pre-recorded' tape for playback, made on this 'specific' deck, and a tape to 'practice record' on.) 

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

 

 

    



NEW LISTING 4/13/18
 (Click on above thumbnails to enlarge photos)
  warranty
PRE-OWNED AND FULLY SERVICED
SONY CASSETTE TAPE DECK
SONY TC-K850ES
"It's got a few minor 'battle scars', but following it's full service, makes
up for that in Super-Sonic performance"
3 HEADS / 3 MOTORS
USER BIAS ADJ, AUTO-TAPE CALIBRATION, AND RECORD LEVEL*
and Quartz Locked Speed
#...0168
With HX-PRO & DOLBY B&C NR
MADE IN JAPAN!
Circa early 1990's
for sale
SOLD TO RYAN IN VIRGINIA

ü Our technician has completely and EXTENSIVELY gone through and 'Certified' this unit which involves complete removal and disassembly of the entire tape transport, cleaning inside and out, DISASSEMBLING, cleaning and re-lubricating all internal mechanisms and the balance of efforts listed below (unit actually worked very well prior to disassembly as well).

ü Heads inspected for excessive wear (obviously we do this 'early on' as 'excessive' wear will usually negate any further restoration work).

ü All new internal Capstan Drive belts replaced for trouble-free service.

ü New 'Shift Roller' acquired (from Slovikia) and installed.

ü Left Rubber pinch roller has been reconditioned

ü Capstan 'Thrust Bearings' cleaned and re-lubed w/ silicone based lube

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

ü Head alignments and azimuth at 125Hz, 1kHz and 10kHz adjusted for 'peak performance' with O-Scope. Both channels now even w/ 'max' output.

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

ü Both spindles in perfect alignment.

ü FF, REW, & Play transport functions all test perfectly and controls tested for 'positive / accurate' responsive.

ü Eject door 'Auto mechanism' operates smoothly.

ü Tape Counter Function tested

ü Dolby B & C NR circuits / function tested

ü HX-Pro tested

ü 'Memory / Zero Return' function tested

ü Heads are in great condition

ü Meters adjusted to even zero with symmetric input.

ü Pinch roller and heads all in GREAT condition!!!

ü Both Internal playback amplifier channels adjusted for 'even output'

ü Meters adjusted to even zero with symmetric input.

ü Both Internal Record amplifier channels adjusted for 'even output'

ü Playback meters zero with factory test tone tape.

ü Speed tests at 100% accuracy (this deck has a 'FG-Servo / Synchronous' motor with a circuit board mounted, 'Comparator' system to maintain perfect speed so is 'always' 'on speed'), with 1kHz factory calibration tape (meaning 1kHz calibration tape plays back at 1000Hz +/- 1Hz)

ü Cosmetics are not great. The sheet metal case has some creases / dents (don't know how they got there), and the originally, optional Rose wood side panels have a few dents (don't know if they were there before someone acquired them, or happened after installation). The wood panels could be removed, and we thought about it, but even with their cosmetic issues, they add to it's overall look being left intact.
ü Plays perfectly and after adjustment, records AMAZINGLY well. Normally we would give a "dB Down or UP" rating / results, but this deck has so many ways to have it's record levels and quality 'tweaked' that there's no 'one number' that can be assigned to it. Yes it can record at 'positive dB's' but with different attributes depending on the tape type and how 'hot' you wish to record. We found the best results with at Maxell UDXL-II tapes. We tried recordings using the 'Calibration' system, but usually found that we liked adjusting the 'Bias' control to suit our ears. Then we discovered the +/-3dB 'Record Level' control (No not the typical "Input Level" control, that is always labeled "Record Level", but a control on the outside that gives you access to the actual 'internal "record level"' normally located on the circuit board and adjustable by a technician via 'pc mounted' pots. This opened up a whole new layer of recording that we normally only get to experiment with while a unit is on the bench.
While doing the test recording's, it became apparent that this decks recording capabilities were AMAZING.
Total technician time to restore 8+ hours.

____________________________

The Sony TC-K850ES, 3-Head / 3-Motor Cassette Tape Deck. Great deck for doing your tape transfers if your tapes were recorded with no NR or with "Dolby B" or "Dolby C", but REALLY SHINES if you want to make new tapes as it's got HX-PRO and 'TONS' of serious recording features. Again, as stated above, records AMAZINGLY well! Also has 'gear driven' reel tables, which means there not 'pesky' idler tire or drive belts to worry about (which takes 'eating tapes' off the table).

SONY TC-K850ES Features include:
  
- 3 Heads (allows instantaneous monitoring of recordings for the best audio results)
- "Laseramorphous Magnetic Alloy" head (wow, that's a mouthful, but means that it's got a super accurately cut gap, and is of a 'really hard, non-magnetic material, which thus means, "it sounds good now and will for a long time")
- *User adjustable RECORD LEVEL control (+/- 3dB, and NO, NOT the same as the typical 'Input (record) Level Control'
- User adjustable BIAS control
- Tape 'Calibration' system
- HX-PRO (HX-PRO is used to 'encode' your tapes as you record. Once a tape is encoded in HX Pro, it will playback on any deck, then exhibiting the benefits of HX-Pro)
- FG Capstan motor with 'Quartz Locked' speed (never needs adjusting and will always be 'speed accurate')
- 'Closed Loop / Dual Capstan' tape transport system
- 3 Motors
- IC logic "touch-control" tape transport
- Motor driven Tape Load and Eject
- Auto Selector for Normal (EX / I), CrO2 (SX / II) & Metal (ZX / IV)Tape Type
- Multi-Functional Fluorescent display window
- Digital, tape counter
- Dolby B&C NR
- Record Muting
- "CD DIRECT" input (bypasses MPX filter, Balance and likely other circuits)
- Built-in MPX filter for killing the 19kHz pilot tone in FM transmissions
- Input level control with L & R balance (balance control sometimes has best meter balance at somewhere between "11:00 and 1:00" depending on tape type and / or Biasing position and  / or 'Record Level' position)
- Memory Stop / Repeat for counter
- AMS (Automatic Music Sensor) system for finding next or previous tracks (must have a min of 4 seconds between tracks / songs)
- Front mounted, 1/4", Stereo Headphone jack
- Timer Play / Record function.

SONY TC-K850ES Specifications:
 
Track format: 4 track / 2 channel
Heads: 3 (Ferrite Erase head, Permalloy PB head and LA Record head)
Motors: 3
Freq Response; 15-21,000Hz +/- 3db w/ Metal Tape @ 0VU (not the typical "-20dB" of every other deck I've come across)
15-19,000Hz +/- 3db w/ CrO2 Tape
15-17,000Hz +/- 3db w/ 'Normal' Tape @ -20dB
(a note on the 'spec'd' "Frequency Response" of this deck. I don't ever recall seeing a deck going below 20Hz. This one specs "15Hz!!!")
Wow & Flutter (WRMS): 0.024% NAB
Tape Speed: 1-7/8 ips
Harmonic Distortion / THD: 1.0% (Metal Bias Tapes)
S/N ratio w/ CrO2 tape: 61db w/ Dolby dis-engaged
70db w/ Dolby-B engaged
76db w/ Dolby-C engaged
Bias Frequency: Adjustable AC Bias
  
Again, we have completely cleaned, refurbished / serviced and thoroughly tested this SONY TC-K850ES cassette tape deck.
It does have a few 'battle scars' (see above photos), but will make up for it in performance, again check the recording results, and the 1kHz = 1kHz speed!
If I didn't already have 'a sufficient number' of cassette decks in my collection, this one wouldn't be leaving, especially after experimenting with the 'Bias and Record Level' controls.
Great for transferring your no NR or Dolby B / C NR / HX-PRO encoded tape collection to CD, Hard-drive or MP3, or BETTER YET, 'making your own tapes' with HX-PRO. Built very well! Looks like new, works and sounds great. Comes with an 'e-copy' / pdf of the Sony TC-K850ES owners manual and the service manual if purchaser desires. Measures 18.25" wide (w/ wood panels installed) x 13.5" deep x 5.2" tall and weighs 16 lbs unpacked. Includes our standard 90 day limited warranty.
SONY TC-K850ES
Cond. 8 (due only to creases on top panel and dings in installed 'originally optional' wood panels. The deck looks much better and way more 'striking' in 'real life' than in the 'washed out photos'. It's hard to accurately depict 'true black'.)

 (Cons.) R.R.
SOLD TO RYAN IN VIRGINIA

(tape shown in photos not included. We do ship our decks with a  a 'pre-recorded' tape for playback, made on this 'specific' deck, and a tape to 'practice record' on.) 

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

 

   

NEW LISTING 12/19/17
 (Click on above thumbnails to enlarge photos)
  warranty
PRE-APPRECIATED
FULLY SERVICED
DENON CASSETTE DECK
DENON DRR-730
AUTO-REVERSE
STEREO CASSETTE TAPE DECK
With DOLBY B & C
& HX PRO
Circa 1992-97
Made in Japan
SOLD 2/5/18
SHIPPING TO NEW MEXICO

ü Our technician has completely and EXTENSIVELY gone through and 'Certified' this unit which involves complete removal and partial disassembly of the entire transport, cleaning inside and out, DISASSEMBLING, cleaning and re-lubricating all internal mechanisms and the balance of efforts listed below.

ü Heads inspected for excessive wear (obviously we do this 'early on' as 'excessive' wear will usually negate any further restoration work).

ü Head rotating gear inspected with a jewelers loop prior to starting any restoration work, and found to be 'hairline' crack free.

ü All 'reel drive' tires reconditioned for years of trouble-free service.

ü All new internal Drive and Counter belts replaced for years of trouble-free service.

ü Rubber pinch roller has been reconditioned

ü Capstan burnished

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

ü Head alignments and azimuth at both 1kHz and 10kHz adjusted for BOTH directions for 'peak performance' with O-Scope

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

ü Both spindles in perfect alignment.

ü Heads are in great condition

ü Internal playback levels adjusted for even playback w/ alignment tape, Oscilloscope, and mVAC meter

ü Playback meters adjusted for 'playback' zero'd with factory test tone tape.

ü Internal Record amplifier channels adjusted for 'even output'

ü Pinch roller and heads all in GREAT condition!!!

ü Speed adjusted to 100% accuracy BOTH directions, with 1kHz factory calibration tape (meaning 1kHz calibration tape plays back at 1000Hz +/- 1Hz)

ü FF, REW, & Play transport functions all test perfectly and controls tested for 'positive / accurate' responsive.

ü Eject door operates smoothly.

ü ALL Tape Counter Functions tested

ü Dolby B & C NR circuits / function tested

ü 'Memory / Zero Return' function tested

ü Cosmetics are LIKE NEW!

ü Plays perfectly and after adjustment, records very well at -1dB! on about any formulation of tape. We did 'test recordings' of Pink Noise and 'ddd' CD's on 6 tapes; Sony Normal Bias, Fuji Normal Bias, TDK Normal Bias, Maxell Normal Bias, TDK 'SA' High Bias, and Maxell 'XL-II' High Bias. We found that they all performed VERY well on this particular deck. We did however find that the deck likes to record at about -10dB on the meters, for 'smoother saturation' of tape. Again, we really didn't have a favorite, plus the deck has adjustable Bias (although we left it 'centered' for our tests).
Total technician time to restore 8+ HOURS!
  ____________________________

Great performing deck. The Denon DRR-730. Following the above mentioned service / refurb, it's now reliable for playing, recording or if you need to burn some tapes to CD. Looks and runs great! 

Denon DRR-730 Features:
 
- IC Logic Touch Tape Transport controls
- 2 Motor Transport (1 Cap motor and 1x 'Reel' motor)
 - Dual power supplies (one for transport and one for audio circuits) makes for more stable operation
- HX Pro circuitry
 - "Amorphous" Head for super long life
- Tri-mode Auto-Reverse
- Auto tape type selector for Normal / Chrome & Metal tapes
- Dolby B & C Noise Reduction
 - Built-in MPX filter for killing the 19kHz pilot tone in FM transmissions
- Fine Bias adjustment
- Variable Output Level control (one of the most important features on a deck in our opinion)
- Front-mounted 1/4" stereo headphone jack
- Record Mute
- Next song search
- 'Record Return' function
- Digital Fluorescent tape counter
- Dual, fluorescent level meters
- Memory tied to the counter
- Optional infrared remote control (not included)

Denon DRR-730 Specifications:
 
Track format: 4 track / 2 channel
Motors: 2
Freq Response; 25-19,000Hz +/- 3db w/ Metal Tape @ -20dB
Wow & Flutter (WRMS): 0.055% wtd
Tape Speed: 1-7/8 ips
Harmonic Distortion / THD: <3.0% @ 1kHz & 0dB (High Bias Tapes)
S/N ratio w/ CrO2 tape: >74db w/ Dolby C engaged (and High Bias Tapes)
Bias Frequency: 105kHz w/ control centered
Separation: >40dB @ 1kHz, 0dB
Crosstalk: >65dB @ 1kHz, 0dB
Recording Level: 200 nWb/m & 0dB
Headphones Output: 1.2mW @ 8 Ohms
Fast Wind Time: ~110 Seconds for C-60 tape
 
Again, as mentioned above, our tech has gone through it completely cleaning all parts, controls and tape mechanism. We also checked, cleaned, reconditioned and / or replaced rubber components. We completely de-magnetized the heads and transport. Capstan motor speed adjusted to exact spec! Tape speed re-adjusted to 100% accuracy, ie; 1 kHz = 1 kHz! Test records incredibly well and plays back at -1 dB down!  Looks NEW and sounds great! Great for transferring your tape collection to CD, Hard-drive or MP3. Test plays and Records extremely well. Very clean deck and usable deck! Measures 17.25" w X 11" d X 5" h and unpacked weight is 10 lbs. Comes with our 90 day limited warranty.
DENON DRR-730
 Cond. 9
SOLD 2/5/18
SHIPPING TO NEW MEXICO

(tape shown in photos not included. We do ship our decks with a  a 'pre-recorded' tape for playback, made on this 'specific' deck, and a tape to 'practice record' on.) 

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

 

     

NEW LISTING 12/20/17
 (Click on above thumbnails to enlarge photos)
  warranty
VINTAGE & FULLY SERVICED
YAMAHA 'Natural Sound' CASSETTE DECK
YAMAHA KR-720
THIS THING IS 'LOADED'!!!
AUTO-REVERSE
STEREO CASSETTE TAPE DECK
With DOLBY B, C AND dbx NR
HX PRO and MUCH MORE!
#...6806
Circa 1992-97
Made in Japan
SOLD 1/12/18
SHIPPING TO OTTAWA, CANADA

ü Our technician has completely and EXTENSIVELY gone through and 'Certified' this unit which involves complete removal and partial disassembly of the entire transport, cleaning inside and out, DISASSEMBLING, cleaning and re-lubricating all internal mechanisms and the balance of efforts listed below.

ü Heads inspected for excessive wear (obviously we do this 'early on' as 'excessive' wear will usually negate any further restoration work).

ü Head rotating gear inspected with a jewelers loop prior to starting any restoration work, and found to be 'hairline' crack free.

ü 'Gear driven' hubs, so NO reel tires for trouble-free service.

ü Main drive / capstan belt replaced for years of trouble-free service.

ü Rubber pinch roller has been reconditioned

ü Capstan burnished

ü Heads have been cleaned and de-magnetized as well as the entire transport. (Tech noted, "VERY minimal wear" to the heads on the work sheet)

ü Head alignments and azimuth at both 1kHz and 10kHz adjusted for BOTH directions for 'peak performance' with O-Scope

ü All 'user' potentiometers / controls removed, then cleaned and tested for noise-free function.

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

ü Both spindles in perfect alignment.

ü Heads are in great condition

ü Internal playback levels adjusted for even playback w/ alignment tape, Oscilloscope, and mVAC meter

ü Playback meters adjusted for 'playback' zero'd with factory test tone tape.

ü Internal Record amplifier channels adjusted for 'even output'

ü Pinch roller and heads all in GREAT condition!!!

ü Speed adjusted to 100% accuracy BOTH directions, with 1kHz factory calibration tape (meaning 1kHz calibration tape plays back at 1000Hz +/- 1 Hz)

ü FF, REW, & Play transport functions all test perfectly and controls tested for 'positive / accurate' responsive.

ü Eject door operates smoothly.

ü ALL Tape Counter Functions tested

ü Dolby B, C & dbx NR circuits / function tested

ü 'Memory / Zero Return' function tested

ü Cosmetics are decently clean, with typical, minor wear

ü Floor noise measured at -60dBm

ü Plays perfectly and after adjustment, records very well at -0.5 to -1dB! on most formulations of tape however, two did 'shine' over the rest of our test tapes. We did 'test recordings' of Pink Noise and 'ddd' CD's on 6 tapes; Sony Normal Bias, Fuji Normal Bias, TDK Normal Bias, Maxell Normal Bias, TDK 'SA' High Bias, and Maxell 'XL-II' High Bias. We found that they all performed VERY well on this particular deck (although the Fuji DR-1 definitely came up 'last'). The Sony HF 'Normal Bias' did very well with both PN and ddd CD at -.5dB w/ no NR. It exhibited good saturation capabilities with minimal 'high end' loss. It recorded at -6dB w/ dbx engaged, but that was from a starting point of more than +10dB on the meters. Dolby B was -2 and C was -2. Maxell UDXL-II was at -1.5dB with PN, but with ddd CD and no NR it exhibited great recording at -1.0dB with GREAT high end retention. dbx was at -6dB down, but again, that was from a ++10dB starting point. Bottom line is it makes GREAT recordings.
Total technician time to restore 8+ HOURS!
  ____________________________

Great performing and LOADED deck. The Yamaha K-720. There's not much this deck doesn't do for a '2-head' machine. Following the above mentioned service / refurb, it's now reliable for playing, recording or if you need to burn some tapes to CD. Looks and runs great! 

Yamaha KR-720 Features:
 
- IC Logic Touch Tape Transport controls
- 3 Motor Transport
- Dolby B & C and dbx Noise Reduction
- HX Pro Dynamic Bias Servo System
 - "Sendust" Head for super long life
- Tri-mode Auto-Reverse
- Auto tape type selector for Normal / Chrome & Metal tapes
- Auto Bias and Tape Equalization
- Optical Tape End detector
- Record Mute
- Intro Scan (quick preview of songs on tape)
- Blank Skip
- Repeat (repeats current selection or of 'programmed selections')
- 'Beginning of Recording' Return function
- Auto-Fade at tape end and Side-B beginning (defeat-able 8-sec in and 4-sec out)
- Digital, Multi-Function, Fluorescent tape counter (Linear and Remaining Time displays)
- Dual, fluorescent level meters
- Memory tied to the counter
- Front-mounted 1/4" stereo headphone jack
- Timer option for Play or Record start
- Originally Optional 'wired' remote control (not included)

Yamaha KR-720 Specifications:
 
Track format: 4 track / 2 channel
Heads: Sendust Rec / Playback. Double Gap, Ferrite Erase
Motors: 3, DC Servo Capstan Motor, Flat Torque DC Reel Motor, and DC mechanism motor
Freq Response; 30-20,000Hz +/- 3db w/ Metal Tape @ -20dB
30-19,000Hz +/- 3db w/ CrO2 Tape @ -20dB
30-17,000Hz +/- 3db w/ 'Normal' Tape @ -20dB
Wow & Flutter (WRMS): 0.04% wtd
Tape Speed: 1-7/8 ips
Harmonic Distortion / THD: <1.0% @ 1kHz & 0dB (High Bias Tapes)
Line Input 'Nominal': 45mV & <47K Ohms
Microphone Input 'Nominal': 0.4mV & 5K Ohms
Line Output 'Nominal': 360mV & <47K Ohms
S/N ratio w/ CrO2 tape: >90db w/ dbx engaged (and High Bias Tapes)
>75db w/ Dolby C engaged (and High Bias Tapes)
>67db w/ Dolby B engaged (and High Bias Tapes)
>59db w/ Dolby B engaged (and High Bias Tapes)
Headphones Output: 70mV @ 8 Ohms
Fast Wind Time: ~70 Seconds for C-60 tape

Again, as mentioned above, our tech has gone through it completely cleaning all parts, controls and tape mechanism. We also checked, cleaned, reconditioned and / or replaced rubber components. We completely de-magnetized the heads and transport. Capstan motor speed adjusted to exact spec! Tape speed re-adjusted to 100% accuracy, ie; 1 kHz = 1 kHz! And with it's service work completed the deck records incredibly well and plays back at -1 dB down!  Looks NEW and sounds great! Great for transferring your tape collection to CD, Hard-drive or MP3. Plays and Records extremely well. Very clean deck and usable deck! Includes a pdf / e-copy download of the Yamaha KR-720 owners / users / instruction manual (which you're gonna need to appreciate of of the function of this deck). Measures 17.25" w X 12" d X 4.25" h and unpacked weight is 13lbs. Comes with our 90 day limited warranty.
Yamaha KR-720
 Cond. 9
SOLD 1/12/18
SHIPPING TO OTTAWA, CANADA

(tape shown in photos not included. We do ship our decks with a  a 'pre-recorded' tape for playback, made on this 'specific' deck, and a tape to 'practice record' on.) 

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

    



NEW LISTING 12/4/17
 (Click on above thumbnails to enlarge photos)
  warranty
VINTAGE AND FULLY SERVICED
TASCAM STUDIO CASSETTE TAPE DECK
TASCAM 112R
"Not going to win any 'Beauty Contests', but makes
up for that in 'Studio Mix-Down' performance"
 3 HEADS / 3 MOTORS
AUTO-REVERSE W/ 'BI-DIRECTIONAL RECORDING'
#...0195
With DOLBY B &C NR
MADE IN JAPAN!
Circa 1986-93
SOLD 1/6/18
SHIPPED TO VIRGINIA

ü Our technician has completely and EXTENSIVELY gone through and 'Certified' this unit which involves complete removal and disassembly of the transport (not an easy task on this deck), cleaning inside and out, DISASSEMBLING, cleaning and re-lubricating all internal mechanisms and the balance of efforts listed below.



ü Heads inspected for excessive wear (obviously we do this 'early on' as 'excessive' wear will usually negate any further restoration work).

ü Head rotating gear inspected with a jewelers loop prior to starting any restoration work, and found to be 'hairline' crack free.

ü 'reel drive' tire reconditioned for years of trouble-free service.

ü All new internal Drive and Counter belts replaced for years of trouble-free service. (this was especially important to eliminate any audible WOW and Flutter)

ü Rubber pinch roller has been reconditioned

ü Capstan burnished

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

ü Head alignments and azimuth at both 1kHz and 10kHz adjusted for BOTH directions for 'peak performance' with O-Scope

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

ü Both spindles in perfect alignment.

ü FF, REW, & Play transport functions all test perfectly and controls tested for 'positive / accurate' responsive.

ü Eject door operates smoothly.

ü Tape Counter Function tested

ü Dolby B & C NR circuits / function tested

ü 'Memory / Zero Return' function tested

ü Heads are in great condition

ü Internal playback levels adjusted for even playback w/ alignment tape, Oscilloscope, and mVAC meter

ü Internal Record amplifier channels adjusted for 'even output'

ü Meters adjusted to within 1.5dB with symmetric input.

ü Pinch roller and heads all in GREAT condition!!!

ü Both level meters playback even.

ü Speed adjusted to 100% accuracy BOTH directions, with 1kHz factory calibration tape (meaning 1kHz calibration tape plays back at 1000Hz +/- 1Hz) (VERY difficult to do on this deck by the way)

ü Cosmetically, it's definitely not going to "win any beauty contests" (see above 'horizontal' photo collage), but it makes up for it in performance.

ü Plays perfectly and after adjustment, records AMAZINGLY well at -1dB! on Maxell UDXL-II tapes and -.5dB on Maxell UR / Normal Bias tapes (but 'top end' will not be as good as on CrO2). (Following the extensive restoration, we did 'test recordings' of a 'ddd' CD on 6 tapes; Sony HF Normal Bias -3dB, Fuji Normal Bias -2.5dB, TDK Normal Bias -1.5dB, Maxell Normal Bias, TDK 'SA' High Bias -2dB (didn't saturate as well as the Maxell UDXL-II), and Maxell 'XL-II' High Bias. We found that for Normal and High Bias, of those tapes tested, both "Maxells" performed well on this particular deck. The Maxell's did however much 'outshine' the TDK's for being able to 'over saturate' on the levels. While doing the test recording's, it became apparent that the recorded sound was fairly remarkable.
Total technician time to restore 16.5 HOURS!
  ____________________________

The TASCAM 112R, 3-Head / 3-Motor, Auto-Reverse with 'Bi-Directional Recording', Rack-Mount, Studio Stereo Cassette Tape Deck. Again, cosmetically it's only 'fair', but works GREAT!!!
Perfect deck for doing your tape transfers if your tapes were recorded with no NR or with "Dolby B" or "Dolby C". Again, as stated above, records AMAZINGLY well!

TASCAM 112R Features include:
  
- 3 Heads (allows instantaneous monitoring of recordings for the best audio results)
- Auto-Reverse, with 'Bi-Directional' Recording (not just 'A' side recording!)
- Dual, Asymmetrical Flywheel drive
- IC logic "touch-control" tape transport with motor driven 'cam control mechanism'
- Auto Selector for Normal (EX / I), CrO2 (SX / II) & Metal (ZX / IV)Tape Type
- Dual 13-Segment, LED Level Meters
- Digital, 'Multi-Function' tape counter
- Dolby B &C NR
- Record Muting
- Record level control with L & R balance
- Memory Stop / Repeat for counter
- Dual, Front mounted, 1/4", Microphone Jacks
- Front mounted, 1/4", Stereo Headphone jack
- Timer Play / Record function.
- DIN on rear panel for optional wired remote, TEAC RC-205 (remote not included)
- Rack Mountable, with originally 'optional' rack ears, INCLUDED

TASCAM 112R Specifications:
 
Track format: 4 track / 2 channel
Motors: 3
Freq Response; 25-20,000Hz +/- 3db w/ Metal Tape @ -20dB
25-18,000Hz +/- 3db w/ CrO2 Tape @ -20dB
25-17,000Hz +/- 3db w/ 'Normal' Tape @ -20dB
Wow & Flutter (WRMS): 0.03% wtd
Tape Speed: 1-7/8 ips +/-0.5% (but as stated above, we have adjusted to 100% accuracy w/ 'Pitch Control' ''centered''!)
Harmonic Distortion / THD: <1.0% @ 1kHz & 0dB (High Bias Tapes)
S/N ratio w/ CrO2 tape: >60db w/ Dolby dis-engaged (and High Bias Tapes)
>70db w/ Dolby-B engaged (over 5kHz and High Bias Tapes)
>80db w/ Dolby-B engaged (over 1kHz and High Bias Tapes)
Bias Frequency: 100kHz
Pitch Control: +/- 15%
Erasure: >65dB below saturation level @ 1kHz / +10dB
Separation: >45dB @ 1kHz, 0dB
Recording Level: 200 nWb/m & 0dB
Line Input 'Nominal': -10dBV / 300mV & <40K Ohms
Line Input 'Maximum': -22dBV / 794mV & <40K Ohms
Line Output 'Nominal': -10dBV / 300mV & <3.5K Ohms
Line Output 'Maximum': -5 dBV / 560mV & <3.5K Ohms
Headphones Output: 2.5mW @ 8 Ohms
Fast Wind Time: ~70 Seconds for C-60 tape
  
Again, we have completely cleaned, refurbished / serviced and thoroughly tested this TASCAM 112R cassette tape deck.
It does have a few 'battle scars', so isn't going to 'win' any beauty contests (see above 'horizontal' photo collage), but will make up for it in performance, again check the -1dB recording results, and the 1kHz = 1kHz speed!
Great for transferring your no NR or Dolby B / C NR encoded tape collection to CD, Hard-drive or MP3. Built very well! Looks like new, works and sounds great. Measures 19.25" wide (w/ rack ears installed) x 11.5" deep x 4.6" tall and weighs 13 lbs unpacked. Includes our standard 90 day limited warranty. 
TASCAM 112R
Cond. 7.5
SOLD 1/6/18
SHIPPED TO VIRGINIA

(tape shown in photos not included. We do ship our decks with a  a 'pre-recorded' tape for playback, made on this 'specific' deck, and a tape to 'practice record' on.) 

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