STEREO RECEIVERS
VINTAGE, CLASSIC & RESTORED

NEW LISTING 5/10/13
  (Click on above thumbnails to enlarge photos)
  warranty
VINTAGE PIONEER STEREO RECEIVER
THE CLASSIC PIONEER SX-950
BIG POWER AND SIZE!
Circa Late 1976 / Early 1977-78/79
MIJ
 for sale

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

ü  Everything was cleaned inside and out including all contacts, switches and controls.

ü  Power switch replaced with original Pioneer OEM part

ü  Volume potentiometer replaced with original Pioneer OEM part

ü  Voltage selector switch replaced

ü  Skewed control shafts straightened

ü  Electrolytic power supply filter capacitors tested for leakage

ü  All 4 power transistors removed, tested for leakage

ü  Shorted / bad output transistors replaced with ‘new’ TO-3’s

ü  All transistors re-installed with fresh heat-sink compound (usually good for 20-30 years)

ü  Bias current adjusted to correct levels.

ü  DC offset adjusted to correct levels.

ü  We also aligned the tuner for optimum AM & FM performance as older internal tuner components have always drifted on vintage gear over the years. VERY GOOD TUNER! AM reception WAY above average, FM reception incredible, PUNCHY and IMPECCABLY CLEAN!!! due to the 'Pair of Dual-Gate MOS-FETS' FM front end and the quality of the restoration.

ü  All meter, dial, function indicator and FM stereo indicator lamps replaced for trouble-free service (dial / meter lamps ‘blue tinted’ to original color)

ü  Entire unit cleaned / detailed cosmetically inside and out. Only cosmetic issues with this unit are some scratches / scuffs on the face plate and AM button.

ü  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! All functions test fine.

ü  Following restoration procedures, the unit was run continuously at medium volume, as all our amplifiers / 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 time investment ~9 hours.  

On our test bench, the internal amplifiers of this receiver #...1405 produced 29 volts per channel @ 8 ohms with 1Khz input for 105 watts and 24 volts per channel @ 4 ohms with 1Khz input for 144 watts via discrete, TO-3, metal cased outputs. (2x 2SB557 & 2x 2SD427).
 AC Idle current at 750mA, Bias adjusted and DC offset output adjusted to 0 mvDC either channel (yes, you read that right '0' as in 'ZERO' DC!!!) Floor noise @ <1mVAC either channel.
   ____________________________

This was from what most people, especially 'techy' types, consider Pioneers 'pinnacle' series of models, and this one is the Pioneer SX-950! During this time, Pioneer had the 'BIGGEST / BADDEST' RECEIVER offered by anyone in it's time (yes, there were larger receivers than what Pioneer was offering later, but not for 1976 / early '77). Classic looking brushed-aluminum silver face and encased in a real wood Walnut veneer cabinet with solid Walnut wood corner caps. These are SERIOUS receivers and this one has been 'certified' following the refurb by Oak Tree Vintage and is in great condition!!! 
Pioneer SX-950 Stereo Receiver Features:
 
Tuner features:
- Weighted flywheel analog "slide-rule" tuning
- FM Muting Selector (separate from the 'Stereo' selector)
- Dual analog 'Signal Strength' and 'Tuning' VU meters
- FM Detector / 4-channel RCA output
- Dual position FM De-emphasis selectable for 25 or 75 msec 

Pre-Amp / 'Control Amplifier' features:
- A, B, C, Any combination of 2 & Off speaker selector
- Dual-Band EQ w/ selectable 'centers' (Bass controls centered at 200 or 400 Hz and Treble @ 2.5 or 5kHz)
- Tone Defeat for purest signal path
- Super quality de-tented Tone and Volume controls
- "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 entire pre-amp section, not just FM tuner)
- Hi filter for reducing tape hiss / electronic hiss & noise and record static
- Built-in 'Low' Filter to eliminate excess rumble from sources such as turntables
--20dB Audio Muting for instant lowering of volume without adjusting the volume control. Great for ringing phones and cuing a record on your turntable

Inputs:
- Dual Phono / turntable inputs with Built-In Phono Pre-Amps
- Dual tape monitors with Tape monitor 'B' also featuring a DIN input as well as the standard RCA I/O's
  (Tape Monitors can be used with Tape / 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)
- Bi-Directional Tape 'Dubbing' capability
- Aux input (may also be used for Video / CD / DVD /DAT / VCR / MP3 / iPod® / iPhone® / iTouch® / iGadget / MP3 / XM® / SIRUS®  etc.)
- Dolby 'Adaptor' Loop can be used as an additional input or as a signal processor loop for EQ, Dynamic Range Expanders, Reverbs, Delays, DBX units, etc.
- 1/4", stereo headphone jack
- Dual Phono inputs with phono 2 doubling as dual Microphone input
- 1/4" front mounted Microphone input

Other:
- Pre-out / Main-in loop
- 3 AC outlets (1 switched / 2 un-switched) with a total capacity of 300 watts
 
Original Pioneer SX-950 Specifications:
  "The SX-950 has a continuous power output of 85 watts per channel min @ 8 ohms & 110 wpc @ 4 Ohms, from 20 hertz to 20,000 hertz with no more than 0.1% THD (measured utilizing AUX input)"
 
POWER / PRE AMP SPECIFICATIONS:
THD:
0.1% @ 85 wpc @ 8 Ohms & 0.05% @ 43 wpc @ 8 Ohms
Freq Response of power amp section:
@ full rated power 20-20kHz
 Potential frequency response of power amp section @ 1w: 7 Hz to 90KHz, + 0 dB,- 1 dB
 IMD utilizing AUX: 0.1% @ 85 wpc
Hum / Noise Ratio: 100dB
Damping factor: 25 @ 8Ω full bandwidth
Power Amp Input Impedance: 50k Ohms
Power Amp Input Sensitivity for Full Output: 1V
Tone Control ranges:
Bass: +/-10dB @ 200Hz or 400Hz
Treble: +/-10dB @ 2.5kHz or 5kHz
Hi Filter: 6 KHz, 6dB/octave
Lo / 'Sub' Filter: 30Hz, 6dB/octave
Loudness Contour w/ vol @-40dB: + 6dB at 100 Hz, + 3dB at 10KHz
Pre-Amp Input Impedance: 50k Ohms
Pre-Amp Input Sensitivity at all inputs except phono & mic: 150mV
Microphone Input Impedance: 50k Ohms
Microphone Input Sensitivity at all inputs except phono & mic: 6.5mV
Input Freq Response (except Phono & Mic): 15-40kHz
Tape Output Impedance: 80k Ohms
Tape Output: 150mV @ RCAs & 30mV @ DIN
Pre-Amp Output Impedance & Level: 1V / 1k Ohms
Pre-Amp THD @ rated output: <0.05%
Pre-Amp S/N @ 'Tape' & 'AUX': 90dB

TUNER SPECS FOR FM:
Freq Response: 30-15kHz per FCC Regulations
S/N: > 72dB Mono @ 65dBf
S/N: > 67dB Stereo @ 65dBf
Useable Mono RF Sensitivity dBf / μV: 10.3dBf / 3.6μV
Useable Stereo RF Sensitivity in dBf / μV: 22.2dBf / 14.1μV
Capture Ratio: 1.0dB
Signal for 50dB quieting, Mono dBf / μV:  17.2dBf / 8.0μV
Signal for 50dB quieting, Stereo dBf / μV:  38.0dBf / 87μV
De-Emphasis: selectable 25 or 75 μ-sec
THD w/ 100% modulation @ 1kHz, Mono:  0.15%
THD w/ 100% modulation @ 1kHz, Stereo:  0.3%
IF Response Ratio: 100dB
Stereo Sub-Carrier Rejection: 62dB
AM Carrier Rejection / Suppression ratio: 55dB
Spurious Rejection: 100 dB
Image Response Ratio: 85 dB
FM Alternate Channel Selectivity: 80dB
Muting Threshold dBf / μV: 14dBf / 5.5μV
Stereo Separation: 40dB @ 1kHz or 30dB @ 30-15kHz

TUNER SPECS FOR AM:

RF Sensitivity: 300uV/meter or 15uV @ binding posts
Alternate Channel Selectivity: 40dB
IF Response Rejection Ratio: 85dB
Image Response Rejection Ratio: 65dB
Signal to Noise Ratio: 55dB

PHONO SECTION SPECS:
Freq Response: 30-15kHz
S/N: 75 dB, ref w/ 10mV input
Input Sensitivity: 2.5 mV @ 50kΩ
Overload limit: 200 mV @ 1kHz

Most techs, including myself, who have been inside of both the SX-xx50 series and the SX-xx80 series, can see quite a few examples of why they believe the xx50 series is better built than the later xx80 series. Yes you get power meters on the xx80 series, but on the 50 series you get TO-3, metal cased outputs, shielding around the control pots and some sensitive circuit boards to reduce RFI noise, heavier control pots and Molex connected pre-driver / output circuit boards to facilitate future service. While the SX-xx80 series is far and above most audio units manufactured in the last 20-25 years, you can just tell that Pioneer figured out how to "save a few bucks" on the newer 80 series.
Again, we have completely gone through this Pioneer SX-950 Stereo Receiver, as stated above and 'certified' it's ready to go!
 Cosmetically, the real wood Walnut cabinet on this one is in great condition. Face is clean with only a bit of typical wear to the top edge and a few light scratches around and on the sides of the 'AM' push button! Unit looks great and sounds HUGE! This is truly one of 'THE ONES' when it comes to CLASSIC STEREO RECEIVERS! Includes 'e' copies of the original Pioneer SX-950 owners / users / instruction manual, and brochure. Measures 20.75" wide x 16.25" deep x 6.75" high and weighs a HEAVY 43 lbs unpacked. Includes our standard 90 day limited warranty!
PIONEER SX-950 STEREO RECEIVER
 Cond. 8.5
$949.

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

Did you know?
While the company 'Pioneer' was officially established in 1961, the founder was actually developing speakers as early as 1937. In 1962 Pioneer marketed the worlds first 'separate component' stereo system for the home, and in 1975, the worlds first 'component system' for the car. In 1984 they introduced the first CD player for the automotive use (and I was selling it then). Pioneer had many other 'firsts' and continue to be a major 'player' in consumer, professional and industrial electronics.

NEW LISTING 5/10/13
  (Click on above thumbnails to enlarge photos)
  warranty
VINTAGE SANSUI STEREO RECEIVER
THE CLASSIC SANSUI G-7700X
BIG POWER AND SIZE!
Circa 1980-82
#...0827
   "WORLD AC POWER" ™
MIJ
SOLD 5/17/13
SHIPPING TO SOUTH DAKOTA

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

ü  Everything was cleaned inside and out including all contacts, switches and controls.

ü  Skewed control shafts straightened

ü  Electrolytic power supply filter capacitors tested for leakage

ü  All 8 power transistors removed, tested for leakage

ü  All transistors re-installed with fresh heat-sink compound (usually good for 20-30 years)

ü  Intermittent ground painstakingly located and corrected

ü  Numerous component connections re-flowed

ü  Bias current adjusted to correct levels.

ü  DC offset adjusted to correct levels.

ü  We also aligned the tuner for optimum AM & FM performance as older internal tuner components have always drifted on vintage gear over the years. VERY GOOD TUNER! AM reception WAY above average, FM reception incredible, PUNCHY and IMPECCABLY CLEAN!!! due to the super quality FM front end and the quality of the restoration.

ü  All dial indicator lamps replaced for trouble-free service (dial / meter lamps ‘blue tinted’ to original color)

ü  Entire unit cleaned / detailed cosmetically inside and out.

ü  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! All functions test fine.

ü  Following restoration procedures, the unit was run continuously at medium volume, as all our amplifiers / 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 time investment ~10 hours.  

On our test bench, the internal amplifiers of this receiver #...0827 produced 38 volts per channel @ 8 ohms with 1Khz input for 180 watts and 34 volts per channel @ 4 ohms with 1Khz input for 289 watts via discrete outputs. (2x 2SA1106 & 2x 2SC2581).
 AC Idle current at 500mA, Bias adjusted and DC offset output adjusted to <2 mvDC either channel. Floor noise @ <0.2mVAC either channel.
   ____________________________

This is one of the dozen or so, largest 'receivers' we have had. At 4 ohms, a single channel was able to produce 289 Watts!!!
Great looking, 'Silver-face' Sansui G-7700 Stereo Receiver. Combines a classic 'Analog/Slide-Rule' tuner w/  digital tuning style display. These units have super quality feeling controls, exceptional tuners and fabulous sonics after restoration. One very smart feature of this model is the rear-mounted and externally located, full width heat sink module to keep the units power amps running cool. All units should follow this lead for much longer life, cooler running and lower distortion. . These are great receivers and this one has been 'certified' following the refurb by Oak Tree Vintage and is in great condition!!! 
Sansui G-7700 Stereo Receiver Features:
 
Tuner features:
- Weighted flywheel analog "slide-rule" tuning w/ 'Digital Readout' as well
- "Quartz Locked" tuning with LED indicator to reduce station drifting
- FM Muting Selector (separate from the 'Stereo' selector)
- Fluorescent 'Signal Strength' and 'Tuning' meters
- Dual position FM De-emphasis selectable for 25 or 75 msec 

Pre-Amp / 'Control Amplifier' features:
- A, B, A+B & Off speaker selector
- Dual-Band EQ
- Tone Defeat for purest signal path
- Super quality de-tented Tone and Volume controls
- "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 entire pre-amp section, not just FM tuner)
- Hi filter for reducing tape hiss / electronic hiss & noise and record static
- Built-in 'Low' Filter to eliminate excess rumble from sources such as turntables
--20dB Audio Muting for instant lowering of volume without adjusting the volume control. Great for ringing phones and cuing a record on your turntable
- Dual 7-Segment LED power meters

Inputs:
- Dual Phono / turntable inputs with Built-In Phono Pre-Amps
- Dual tape monitors with Tape monitor 'B' also featuring a DIN input as well as the standard RCA I/O's
  (Tape Monitors can be used with Tape / 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)
- 1>2 Tape 'Dubbing' capability
- Tape/Aux input (may also be used for Video / CD / DVD /DAT / VCR / MP3 / iPod® / iPhone® / iTouch® / iGadget / MP3 / XM® / SIRUS®  etc.)
- Dolby 'Adaptor' Loop can be used as a signal processor loop for EQ, Dynamic Range Expanders, Reverbs, Delays, DBX units, etc.
- 1/4", stereo headphone jack
- Dual Phono inputs with built-in phono pre-amp
- Front mounted 1/4" Microphone jack
- Microphone Level control (allows you to use receiver as a 'Karaoke' unit...be careful with speakers if doing this)

Other:
- Dual AC outlets (1 switched / 2 un-switched) with a total capacity of 250 watts
  - True “WORLD AC POWER"™ as it will work on both 50 or 60 Hz AC and voltages from 110-240 volts AC
 
Original Sansui G-7700 Specifications:
  "The G-7700 has a continuous power output of 120 watts per channel min @ 8 ohms from 20 hertz to 20,000 hertz with no more than 0.025% THD (measured utilizing AUX input)"
 
POWER / PRE AMP SPECIFICATIONS:
THD:
0.025% @ 120 wpc @ 8 Ohms
Freq Response of power amp section: @ full rated power 20-20kHz
 Potential frequency response of power amp section @ 1w: 7 Hz to 90KHz, + 0 dB,- 1 dB
 IMD utilizing AUX: 0.025% @ 120 wpc
Hum / Noise Ratio: 95dB
Slew Rate: 60 @ 8Ω full bandwidth (One of the main reasons this thing is so punchy)
Damping factor: 50 @ 8Ω full bandwidth (One of the other main reasons this thing is so punchy)
Tone Control ranges:
Bass: +/-10dB @ 50Hz
Treble: +/-10dB @ 10kHz
Hi Filter: -3dB @ 3kHz &  6dB/octave
Lo / 'Sub' Filter: -3dB @ 16Hz & 6dB/octave
Loudness Contour w/ vol @-30dB: + 8dB at 50Hz, + 6dB at 10KHz
Pre-Amp Input Sensitivity at all inputs except phono & mic: 150mV
Microphone Input Impedance: 10k Ohms
Microphone Input Sensitivity: 6mV
Input Freq Response (except Phono & Mic): 15-40kHz
Tape Output Impedance: 47k Ohms
Tape Output: 150mV
Pre-Amp S/N @ 'Tape' & 'AUX': 95dB
Channel Separation Phono / All Other: 60dB / 65dB

TUNER SPECS FOR FM:
Tuning Range: 88-108MHz
Freq Response: 30-15kHz per FCC Regulations
S/N: > 76dB Mono @ 65dBf
S/N: > 71dB Stereo @ 65dBf
Useable Mono RF Sensitivity dBf / μV: 9.8dBf / 1.7μV
Useable Stereo RF Sensitivity in dBf / μV: 17dBf
Capture Ratio: 1.0dB
Signal for 50dB quieting, Mono dBf / μV: 14dBf
Signal for 50dB quieting, Stereo dBf / μV: 36dBf
De-Emphasis: selectable 25 or 75 μ-sec
THD w/ 100% modulation @ 1kHz, Mono: 0.1%
THD w/ 100% modulation @ 1kHz, Stereo: 0.15%
IF Response Ratio: 95dB
Spurious Response Ratio / Rejection: 90dB
IF Response Ratio: 95 dB
FM Alternate Channel Selectivity: 70dB
Stereo Separation: 42dB @ 1kHz or 25dB @ 30-15kHz

TUNER SPECS FOR AM:
Tuning Range: 530-1600kHz
RF Sensitivity: 300uV/meter or 15uV @ binding posts
Alternate Channel Selectivity: 33dB
Distortion @ 30% modulation & 80dB/m: <0.5%
Signal to Noise Ratio: 46dB

PHONO SECTION SPECS:
Freq Response: 20-20kHz (way better than either of it's little brothers, the G-5700 or G-6700)
S/N: 78 dB, ref w/ 10mV input
Input Sensitivity: 2.5 mV @ 47kΩ
Overload limit: 250 mV @ 1kHz

Again, we have completely gone through this Sansui G-7700 Stereo Receiver, as stated above and 'certified' it's ready to go! This is an incredible sounding receiver in all aspects. Due to it's huge power output, even at very low volumes it sound's like a "Class-A" amplifier. The controls are very "musical" sounding, especially the tone control circuit. Also, the reception on both the AM and FM tuning bands are excellent, and the AM is exceptional for a stereo receiver. For the majority of folks, exceptional AM would be inconsequential, but if it is important to you, like it is to me, this becomes an all-around, very usable receiver and a pleasure to use.
Brushed aluminum face and all original, milled knobs in fabulous shape. Wood grain, vinyl wrapped case in great shape as well with only normal, minor cosmetic wear. Entire unit looks NEW! After restoration, receiver performs and sounds great! 

 Cosmetically, this unit is in very good condition. Brushed aluminum face and knobs all original and in great condition. Unit looks great and sounds HUGE! Measures 20" wide x 16.75" deep x 7.25" high and weighs a HEAVY 40 lbs unpacked. Includes our standard 90 day limited warranty!
SANSUI G-7700 STEREO RECEIVER
 Cond. 8.5
(C) M.R.
SOLD 5/17/13
SHIPPING TO SOUTH DAKOTA
 

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

   

    

NEW ADDITION 2/4/11
 (Click on above thumbnails to enlarge photos)
  warranty
VINTAGE STEREO RECEIVER KENWOOD 'SUPER QUAD' QUADRAPHONIC / 4-CHANNEL / 2-CHANNEL STEREO RECEIVER KR-9940 / KR-9340  kr9940
#...0541  
Circa 1973-76
   "WORLD AC POWER" ™
 M.I.J. 
 for sale
Our technician has completely gone through and 'Certified' this unit.  
- Everything was cleaned inside and out including all switches, controls and contacts including phono and tape monitor selectors.  
- Capacitor replaced in protection circuit.  
- We also resolved a decoder issue, the 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!  
- The all dial & meter lamps replaced with new bulbs for trouble-free service.  
- We also disassembled the power switch and replaced the internal neon lamp (the power switch on this unit actually 'lights' up when the unit is off, presumably to make it easier to find in a darkened room and is off when the unit is on).  
- We also, removed the entire output / heat sink section, removed all the output transistors and applied fresh heat sink compound which should be good for another 30 years now.  
- Amplifier section had output bias and DC offset adjusted to spec levels.  
- All inputs 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 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 into a 4 ohm load.
 
  On our test bench, this particular KR-9940, #...0541, amplifiers each produced 23.75 volts  per channel for 70 watts per channel @ 8 Ω via discrete output & 19.74 volts per channel for 97 watts per channel @ 4 Ω via discrete, Metal cased, TO-3 outputs.
(AC draw at idle 0.60A tested)
(Floor noise measured at 2.5mVAC)
 ___________________________
 
  Impressive huge Kenwood Silver-face 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 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. This unit appears to have been marketed under two model numbers. The KR-9940 and the KR-9340 (likely one for North America and the other for the rest of the planet).
From original Kenwood brochures, "Kenwood KR-9940 can function as a two or four channel receiver, having a built in regular matrix and SQ type decoders....As a four channel receiver the amplification channels work separately, each driving one of four speakers....The semi-complementary directly coupled power amplifiers have wideband and low distortion characteristics which ensure smooth, high-fidelity amplification....Two pairs of speaker terminals are available to permit simultaneous listening at two different places....A double switching demodulator is used in the MPX section to prevent carrier leaks and ensure the best sound quality".
 Features include:
  
- Quadraphonic (no it's not spelled 'quadriphonic' !!!) / 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 for reducing 19kHz pilot tone in FM broadcasts, Tape Hiss and the Sub filter for reducing turntable rumble
  - FM muting (separate from Stereo / Mono selector)
  - 'Mode' selector for Stereo / Mono, 2-Channel & 4-Channel modes of 'RM' / 'SQ Logic', or 'Discrete'.
 - 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
- Dual Meter Level selector
   - Front and Rear 1/4" stereo headphone jacks
   - Rear mounted 1/4" microphone jack (be careful with your speakers if you are going to utilize this!)
  - Tuning window features dual VU meters for tuning and signal strength
  - Quad VU meters for power output level
  - FM Detector RCA output
  - *Kenwood's KCD-2, CD-4 system, disc demodulator Adaptor slot and includes the KCD-2 adaptor that is often missing on these models
 - Rear located, full barrier strip for external antenna connections
- 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 160 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

Original Specs:
  "The KR-9940 has a 'Direct-Coupled / DC' amplifiers that produce continuous power output of 40 watts per channel min. @ 8 ohms from 20 hertz to 20,000 hertz with no more than 0.5% THD (measured utilizing AUX input)"
 
Original Kenwood KR-9940 / KR-9340 Specifications:

 POWER / PRE AMP SPECIFICATIONS:
 THD; 0.5% @ full rated power or 0.1% @ 50% rated power @ 1kHz.
 Freq Response of power amp section;
 @ full rated power 20-20kHz
 Power bandwidth of power amp section; 10-50,000Hz ±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 240 watts @ 8 Ohms or 340 watts @ 4 Ohms
Cont rated Power:
4x 40 watts @ 8 Ohms / 20-20kHz
4x 44 watts @ 8 Ohms / 1kHz
4x 55 watts @ 8 Ohms / 1kHz


  Hum and Noise;  75dB on AUX / Tape
Input Sensitivity AUX / Tape; 150mV @ 50kΩ
  Tape 1/2 Output level, via RCA; 150mV @ 50kΩ
  Bass Control;  ±10dB @ 100hz
  Treble Control;  ±10dB @ 10khz
  Low Filter;  -8dB @ 100Hz @ 6dB Oct
  High Filter;  -6dB @ 5kHz @ 6dB Oct
  "Loudness" Contour;  +10dB @ 100hz, +5dB @ 10khz (w/ volume set at -30dB)

PHONO SECTION SPECS:
 Freq Response; 20-20kHz RIAA Standard Curve +/- 1dB.
 S/N; 60 dB
 Input Sensitivity; 1.5 mV @ 50kΩ
 Overload limit; 100 mV w/ 5% THD @ 1kHz

TUNER SPECS FOR FM:
 Freq Response; 20-15kHz
 S/N; > 63db Stereo w/ 1mV input
 AM Suppression; 60dB
 Mono Sensitivity; 1.8 μV
 Capture Ratio; 3.0dB
IF Rejection; 90dB
  Spurious Noise Ratio; 90dB
 THD w/ 100% modulation @ 400Hz, Mono;  0.7%
 THD w/ 100% modulation @ 400Hz, Stereo;  0.8%
Stereo Separation; 40dB at 1Khz & 20dB @ 10kHz
 FM Alternate Channel Selectivity; 50dB

  TUNER SPECS FOR AM:
  Tuning Range; 530-1600kHz
  S/N; > 45db w/ 1mV input
  Useable Sensitivity; 25μV / m with ferrite stick antenna
Image Rejection; 45dB
IF Rejection; 35dB
  Selectivity; 30dB

 Power consumption at max output; 550 Watts. 38 Watts w/ no signal at idle
  
Again, as stated before, we have completely gone through this Kenwood KR-9940 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! Very nice looking when lit up at night or in a darkened room! Comes with a PDF service manual.  Measures 21.5" wide x 6.5" tall x 14.5" deep and weighs an impressive 47 lbs unpacked. Includes our standard 90 day limited warranty.
  KENWOOD KR-9940 STEREO RECEIVER
  Cond. 8.5
$889. w/ KCD-2 Quadraphonic adaptor installed
*$799. if you don't need the adaptor
 

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

Did you know?
What is the difference between a ‘Tuner’ and a ‘Receiver'?
A ‘Tuner’ is the component or aspect of an audio system that receives or ‘Tunes-In’ Radio Stations.
A 2-channel, stereo ‘Receiver’ is really 3 units in one!
It’s a ‘Tuner’ for receiving radio stations. It’s a ‘Pre-Amp / Control-Amp’ for source / input selection & tone / audio signal modification (with likely the phono 'pre-amp / head-amp' built-in). Lastly it’s a ‘Power Amplifier’ to energize your speakers. It's essentially the 'heart' of most audio / stereo systems.
Some manufacturers would silk-screen 'Tuner-Amplifier' on the front of their receivers, but that was / is simply 'marketing' to make it sound as if it's something more complicated. It's still a 'receiver'. Just FYI.

NEW LISTING 5/14/13
  (Click on above thumbnails to enlarge photos)
  warranty
VINTAGE & BEAUTIFUL PIONEER STEREO RECEIVER
THE CLASSIC PIONEER SX-838 / SX838
Circa 1974-76
   "WORLD AC POWER" ™
MIJ
 for sale

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

ü  Everything was cleaned inside and out including all contacts, switches and controls.

ü  Multiple (ALL), 'typically-sticky' push switches removed, overhauled / cleaned and lubed across front

ü  Dial glass removed and completely / solidly re-attached

ü  Skewed control shafts straightened

ü  Electrolytic power supply filter capacitors tested for leakage

ü  Balance of Electrolytic capacitors inspected and replaced as necessary

ü  All question-able and common 'stress point' solder joints re-flowed

ü  All 4 power transistors removed, tested for leakage

ü  Shorted / bad output transistors replaced with ‘new’ 2SC1079 TO-3’s

ü  All output transistors re-installed with fresh heat-sink compound (usually good for 20-30 years)

ü  Bias current adjusted to correct levels.

ü  DC offset adjusted to super low levels.

ü  We also aligned the tuner for optimum AM & FM performance as older internal tuner components have always drifted on vintage gear over the years. VERY GOOD TUNER! AM reception WAY above average, FM reception incredible, PUNCHY, with GREAT SEPARATION and IMPECCABLY CLEAN!!! due to the 'Pair of Dual-Gate MOS-FETS' FM front end and the quality of the restoration.

ü  All (18 in total) meter, dial, function indicator, 'Speaker Indicator' (not an easy task) and FM stereo indicator lamps replaced for trouble-free service (dial / meter lamps ‘blue tinted’ to original color)

ü  Entire unit cleaned / detailed cosmetically inside and out. Only cosmetic issue is that some 'id' info has been 'rubbed / ground' off the top edge of the face plate at sometime in the past (not seen from the front of the unit, only when looking down on it)

ü  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! All functions test fine.

ü  Following restoration procedures, the unit was run continuously at medium volume, as all our amplifiers / 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 time investment ~8 hours.  

On our test bench, the internal amplifiers of this receiver #...777M produced 23 volts per channel @ 8 ohms with 1Khz input for 66 watts and 18 volts per channel @ 4 ohms with 1Khz input for 81 watts via discrete, TO-3, metal cased outputs. (2x 2SA679 & 2x 2SC1079).
 AC Idle current at 400mA, Bias adjusted and DC offset output adjusted to < 0.6 mV DC either channel Floor noise @ <0.5mV AC either channel.
   ____________________________

This is from the series that is commonly referred to as Pioneer's 'Blue Face' receiver offering. Beautiful receiver. Classic looking brushed-aluminum silver face panel, surrounding 'smoked' dial glass, with 'aqua back-lit' enumeration. All encased in a walnut grain, vinyl wrapped, cabinet with solid Walnut wood corner caps. These are SERIOUS receivers and this one has been 'certified' following the refurb by Oak Tree Vintage and is in great condition!!! 
Pioneer SX-838 Stereo Receiver Features:
 
Tuner features:
- Weighted flywheel analog "slide-rule" tuning
- PLL FM Tuning and 'Dual Mos-Fet' circuitry
- Fully Shielded tuner 'Front End'
- FM Muting Selector (separate from the 'Stereo' selector)
- Dual analog 'Signal Strength' and 'Tuning' VU meters
- FM Detector / 4-channel RCA output
- Dual position FM De-emphasis selectable for 50 or 75 msec
- Built-In AM 'Stick / Bar' antenna 

Pre-Amp / 'Control Amplifier' features:
- A, B, C, A+B, A+C, B+C & Off speaker selector (max 2 pair at a time, just with most all receivers / amplifiers to maintain a 4 Ohm minimum)
- Dual-Band EQ w/ selectable 'centers' (Bass controls centered at 200 or 400 Hz and Treble @ 2.5 or 5kHz) (same EQ as the SX-950)
- Tone Defeat for purest signal path
- Super quality de-tented Tone and Volume controls
- "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 entire pre-amp section, not just FM tuner)
- 'Scratch-Filter / Hi filter for reducing tape hiss / electronic hiss & noise and record static
- Built-in 'Low' Filter to eliminate excess rumble from sources such as turntables
- 'Record Selector' allows monitoring of another source, while recording something else
--20dB Audio Muting for instant lowering of volume without adjusting the volume control. Great for ringing phones and cuing a record on your turntable

Pioneer SX-838 Inputs:
- Dual Phono / turntable inputs with Built-In Phono Pre-Amps
- Dual tape monitors with Tape monitor 'B' also featuring a DIN input as well as the standard RCA I/O's
  (Tape Monitors can be used with Tape / 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)
- Bi-Directional Tape 'Dubbing' capability
- Aux input (may also be used for Video / CD / DVD /DAT / VCR / MP3 / iPod® / iPhone® / iTouch® / iGadget / MP3 / XM® / SIRUS®  etc.)
- Dolby 'Adaptor' Loop can be used as an additional input or as a signal processor loop for EQ, Dynamic Range Expanders, Reverbs, Delays, DBX units, etc.
- 1/4", stereo headphone jack
- Dual Phono inputs with phono 2 doubling
- 1/4" front mounted Microphone input

Other:
- Pre-out / Main-in loop (allows feed to an additional / larger power amp, or to 'direct feed' the power-amp in the receiver with another pre-amp or audio mixer)
- Easy 'Serviceable' internal design
- Triple AC 'Convenience' outlets (1 switched / 2 un-switched) with a total capacity of 300 watts
  - True “WORLD AC POWER"™ as it will work on both 50 or 60 Hz AC and voltages from 110-240 volts AC
 
Original Pioneer SX-838 Specifications:
  "The SX-838 has a continuous power output of 50 watts per channel min @ 8 ohms & 60 wpc @ 4 Ohms, from 20 hertz to 20,000 hertz with no more than 0.3% THD (measured utilizing AUX input)"
 
POWER / PRE AMP SPECIFICATIONS:
THD:
0.3% @ 50 wpc @ 8 Ohms & 0.05% @ 1 wpc @ 8 Ohms
Freq Response of power amp section:
@ full rated power 20-20kHz
 Potential frequency response of power amp section @ 1w: 10 Hz to 70KHz, + 0 dB,- 1 dB
 IMD utilizing AUX: 0.3% @ 85 wpc & 0.05% @ 1 wpc @ 8 Ohms
Hum / Noise Ratio: 110dB (10dB increase over the SX-950)
Damping factor: 45 @ 8Ω full bandwidth (almost double the SX-950)
Power Amp Input Impedance: 50k Ohms
Power Amp Input Sensitivity for Full Output: 1V
Headphone: 4-16 Ohms
Tone Control ranges:
Bass: +/-10dB @ 200Hz or 400Hz
Treble: +/-10dB @ 2.5kHz or 5kHz
Hi-Cut / Scratch Filter: -9dB  10KHz, 6dB/octave
Lo Cut Filter: -8dB / 50Hz, 6dB/octave
Loudness Contour w/ vol @-40dB: +8dB at 100 Hz, +4dB at 10KHz
Pre-Amp Input Sensitivity at all inputs except phono & mic: 150mV
Microphone Input Impedance: 50k Ohms
Microphone Input Sensitivity at all inputs except phono & mic: 2.0mV
Input Freq Response (except Phono & Mic): 15-40kHz
Tape Output Impedance: 150k Ohms
Tape Output: 150mV @ RCAs & 30mV @ DIN
Pre-Amp Output Impedance & Level: 1V / 2k Ohms
Pre-Amp THD @ rated output: <0.1%
Pre-Amp S/N @ 'Tape' & 'AUX': 95dB
Pre-Amp S/N @ ''Microphone': 65dB

TUNER SPECS FOR FM
(essentially similar specs on the SX-950 and SX-939):
Freq Response: 20-15kHz
S/N: > 70dB Mono @ 65dBf
Useable Sensitivity (IHF):1.8μV
Capture Ratio: 1.0dB
De-Emphasis: selectable 50 or 75 μ-sec
THD w/ 100% modulation @ 1kHz, Mono:  0.2%
THD w/ 100% modulation @ 1kHz, Stereo:  0.4%
IF Rejection: 100dB
Stereo Sub-Carrier Rejection: 65dB
AM Carrier Rejection / Suppression ratio: 55dB
Spurious Rejection: 100 dB
Image Rejection: 85 dB
FM Alternate Channel Selectivity: 80dB
Stereo Separation: 40dB @ 1kHz

TUNER SPECS FOR AM:

RF Sensitivity: 300uV/meter or 15uV @ binding posts
Alternate Channel Selectivity: 40dB
IF Response Rejection Ratio: 85dB
Image Rejection: 65dB
Signal to Noise Ratio: 50dB

PHONO SECTION SPECS:
Freq Response: 30-15kHz
S/N: >70dB, ref w/ 10mV input
Input Sensitivity 'Phono-1' or 'Phone-2': 2.5 mV @ 50kΩ
Overload limit: 200-250mV @ 1kHz

Most techs, including myself, who have been inside of the various SX Pioneer series receivers, can see quite a few examples of why they believe earlier series are better built than the later series, especially once 1980-81 rolled around. Things TO-3, metal cased outputs, shielding around the control pots and some sensitive circuit boards to reduce RFI noise, heavier control pots and Molex connected pre-driver / output circuit boards to facilitate future service.
Again, we have completely gone through this Pioneer SX-838 Stereo Receiver, as stated above and 'certified' it's ready to go!
This is the first SX-838 (or any of that series) we've had in quite a few years. Cosmetically, with the exception of the previously mentioned 'id' info, the unit is in overall, great condition. Unit looks good, works great and sounds HUGE! Includes an 'e' copy of the original Pioneer SX-939 (essentially the same as the SX-838, just a bit more power) owners / users / instruction manual, and brochure. Measures 20.5" wide x 16.5" deep x 6.75" high and weighs a HEAVY 35 lbs unpacked. Includes our standard 90 day limited warranty!
PIONEER SX-838 STEREO RECEIVER
 Cond. 8.5+
$649.
 

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

     

            NEW LISTING 10/13/12
(Click on above thumbnails to enlarge photos)
  warranty
VINTAGE ROTEL STEREO RECEIVER
ROTEL RX-803 / RX803
#...7457
 Circa 1976-'81
MIJ
for sale

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

ü  Everything was cleaned inside and out
including all contacts, switches, controls and I/O jacks.  

ü  Control Pot shafts re-sprung.
Internal and external fuses checked and replaced where necessary.  

ü  Bad driver board capacitors and transistors replaced.  

ü  Slightly leaky TO-3 output transistor replaced with
an exact and original transistor we had in our 'private stash'.  

ü  We also extensively aligned the tuner front-end,
as well as the 'MPX' circuit for optimum AM & FM performance
as older internal tuner components have always drifted
on vintage gear over the years. Generally AM reception
in a stereo receiver is treated as an 'after thought',
but the AM reception on this Rotel RX-803, #...7457 is pretty decent.
Great sounding FM tuner on this receiver. Very clean, punchy and musical following alignment.  

ü  All dial and meter bulbs replaced.  

ü  DC offset and driver board / output bias current set to correct values.  

ü  All inputs and functions tested, and both amplifiers produce
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.

ü  Unit has been thoroughly detailed inside and out.

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 and into a 4 Ohm Load!
Only cosmetic issues are a bit of minor wear to the face,
including a small blem to the silver plating (see above photos).

 On our test bench, each internal amplifier of this Rotel RX-803, #...7457 produced peak power of 25 volts per channel for 78 watts per channel @ 8 ohms and 21.6 volts @ 4 ohms for 116 watts per channel via discrete, TO-3, metal cased output devices (4x Sanken 2SC1116). Idle current measured at 260mA. Bias current & DC offset / output adjusted to levels within spec. Floor noise measured at 0.3mVAC.
   ____________________________
  
 VERY PUNCHY and 'Musical' sounding, Rotel RX-803 Stereo Receiver. I have a 'soft spot' for Rotel receivers of this time period. I sold them when new, and always liked most of their mid to upper-end models (one of my main personal receivers is a Rotel from this same period). This is a very punchy and full sounding receiver. Very 'musical' sounding. Doesn't fall apart with larger speakers utilizing 15 inch drivers. Well designed amplifiers feature, EXTERNALLY located, vertical heat sinks that keep the heat producing transistors outside of the receiver housing where it belongs. All units should utilize this design.
 
   Rotel RX-803 Features include:

§  Weighted flywheel analog, 'slide rule' dial tuning

§  A, B and A+B speaker selector

§  Separate L & R Bass & Treble with high quality detented controls

§  'Tone Defeat' for purest signal path

§  Pre-Out / Main-In loops

§  Dual tape deck monitors w / 'Tape2' featuring both RCA and DIN
 (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® / 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’ and
with 'Phono1' featuring both RCA and DIN

§  AUX Input (may also be used for Video / CD / DVD / VCR / DAT / MP3 / XM / SIRUS etc.)

§  "Loudness" function to boost Bass and Treble in relationship to
Mid frequencies at lower volume levels for a much fuller sound.

§  Built-in Subsonic Filter to eliminate excess rumble from
 sources such as turntables

§  Hi filter for reducing tape hiss / electronic hiss & noise and record static

§  Stereo / Mono selector for entire pre amp section

§  FM Muting Selector (separate from the 'Stereo' selector)

§  Separate Analog meters for Signal Strength and 'Tuning'

§  Dual position FM Deemphasis selectable for 25 or 75 msec 

§  -15dB Audio Muting for instant lowering of volume without adjusting
the volume control. Great for ringing phones and cuing a record on your turntable

§  Dual AC convenience outlets located on the rear panel
(1 switched @ 100 watts and 1 un-switched @ 100 watts for a total capacity of 200 watts)

  
Rotel RX-803 Original Specs:

 "The Rotel RX-803 Stereo Receiver has a continuous / RMS power output of 70 watts per channel min. @ 8 ohms from 20 hertz to 20,000 hertz with no more than 0.2% THD (measured utilizing AUX input)"
  

POWER / PRE AMP SPECIFICATIONS:
  Output of power amp section;
  @ 70 watts / 8Ω  20-20kHz
 Damping factor; 50 @ 8Ω / 20-20kHz +/-10%
 Hum and Noise;  90dB on AUX / Tape w/ 150mV input
  THD utilizing AUX;
  <0.2% @ 70 watts 20-20kHz (0.08% @ 1 Watt)
  Freq Response / Bandwidth of power amp section; 5-60kHz @ 1 watt / 8Ω 
 Input Sensitivity; 150mV @ 50kΩ on AUX / Tape w/ overload at 5 Volts
 Output levels / impedance (w/ 5mV Phono Input); Tape RCA 330mV / 2.2k Ohms
 Pre-Out levels / impedance (w/ 5mV Phono Input); 0.775V / 2.2k Ohms
   Bass Control;  ±10dB @ 100hz
   Treble Control;  ±10dB @ 10khz
   Low Filter;  ~ -10dB @ 40Hz @ 12dB Oct
   High Filter;  ~ -10dB @ 12kHz @ 12dB Oct
 "Loudness" Contour;  +7dB @ 50hz, +3dB @ 10khz (w/ volume set at -30dB)
 
  TUNER SPECS FOR FM;
  Freq Response; 30-15kHz ±0.5 dB
  S/N; >65db Stereo
  S/N; >70db Mono
  50 dB Quieting Sensitivity:
  Mono 3.2μV (15.2dBf)
  Useable Mono Sensitivity; 10.4dBf / 1.8μV Mono
  Capture Ratio; 1.5dB
  FM Alternate Channel Selectivity; 75dB
 Spurious Response Ratio; 90dB
 Image Response Ratio; 85dB
 IF Rejection / Response Ratio; 95dB
 AM Suppression Ratio; 60dB
 Stereo Separation; 43dB @ 1k & 30dB @ 30-15kHz
 THD 100% modulation @ 1kHz mono / stereo; 0.1% / 0.3%
 
 TUNER SPECS FOR AM;
 Tuning Range; AM Band ~450 kHz-1700 kHz
 Useable Sensitivity (IHF Bar Antenna); 250 μV/m
 Useable Sensitivity (External Antenna); 12.5 μV/m
  
  PHONO SECTION SPECS;
  Freq Response; 30-15kHz
  S/N; 75dB with MM cart.
 Input Sensitivity for rated output of 70 wpc RMS; 2.5 mV @ 50kΩ
  Overload limit; 200 mV

Again, as stated before, we have completely gone through this Rotel, RX-803, Stereo Receiver cleaning and testing all and it gets our full 'Certification' . All functions test fine. This is one of the best 'thumping' amplifiers we've had on our 'burn-in' bench in a while. We have a 3000 sq foot warehouse, and it fills it to an 'uncomfortably high' volume level. This receiver, works and sounds great! Includes a pdf 'e' copy of the Rotel RX-803 owners manual. Unit measures 19.5" wide x 6" tall x 17" deep and weighs 32 lbs unpacked. Includes our standard 90 day limited warranty.
ROTEL RX-803 STEREO RECEIVER
Cond. 8.5
$589.00
(C) R.R.

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

Did you know?
A SUPER LOW DISTORTION RATING COULD LIKELY BE A BAD THING!...
THD (Total Harmonic Distortion) – THD is a measure of the how much a given audio device may distort a signal through the inevitable introduction of added harmonics or overtones. These figures are usually given as percentages. THD figures below approximately 1% are inaudible to most people (although market promotion efficiencies have 'brain-washed' much of the 'audio-public' into weighting low THD with almost 'holy grail' importance. I remember some manufacturers touting numbers as low as <0.003% in the early Eighties).  Low THD is not always an indication of a high quality amplifier. In fact, it is / was more commonly just the opposite. Some of the 'highest end' (read REALLY expensive) and certainly best sounding units will have distortions somewhere between .1% & 1%.
Low THD is only a simple 'bi-product' of 2 aspects. The first was an inordinate and increasing amount of 'global / negative feedback' built into amplifiers primarily to suppress distortion. This practice started to occur in the late 1970's and certainly was in 'full force' past the early 1980's for most 'main stream' consumer-grade audio amplifiers. Unfortunately this also 'suppressed' tone and 'punch' (musicality) but it made the numbers look good to the 'spoon fed' consumer (kind of like overly high speaker wattage numbers, and sorry if you're in that group and, most folks were so you're not alone). Secondly manufacturers were moving away from 'discrete-transistor' output designs to more 'monolithic' 'power-pack' output designs. While these designs reduced power supply requirements, thus reducing parts costs and weight (also translates to lower prices due to savings on freight from Asia) they generally sounded anywhere from somewhat 'anemic' compared with the designs from a few years previous, to completely 'gutless' and 'un-musical'. But, hey,… they had very low distortion figures….Can anyone say 'threw the baby out with the bath water'?
Excerpts of the above text from one of the best Car Audio sites and stores in the world, 'Car-Fi' www.car-fi.com .

               NEW LISTING 10/10/12
(Click on above thumbnails to enlarge photos)
  warranty
PRE-OWNED VECTOR RESEARCH STEREO RECEIVER
VECTOR RESEARCH VRX-9000 / VRX9000
 Circa 1978-'83
MIJ
  for sale
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.  
- 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. Tuner digital readout is within 0.1Mhz of spec, meaning example '98.1' reads '98.2'.  
- Battery backup compartment clean and corrosion free.  
- Generally AM reception in a stereo receiver is treated as an 'after thought', but the AM reception on this Vector Research VRX-9000, #...4176 is WAY above average (frankly it's amazing). VERY GOOD TUNER! FM reception as well great and IMPECCABLY CLEAN!!!  
- Power indicator meter lamps replaced.  
- DC offset and driver board / output bias current set to correct values.  
- Entire display / readout works perfectly.  
- All inputs and functions tested, and both amplifiers 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 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 and into a 4 Ohm Load!
  
   On our test bench, each internal amplifier of this Vector Research VRX-9000, #...4178 produced peak power of 30 volts per channel for 112 watts per channel @ 8 ohms and 25.5 volts @ 4 ohms for 162 watts per channel via discrete output devices. Idle current measured at 250mA. Bias current & DC offset / output adjusted to levels within spec. Floor noise measured at 3.3mVAC.
  ____________________________
 
VERY PUNCHY Vector Research VRX-900 Stereo Receiver designed in the tradition of the classic analog models, but with the convenience of a digital tuner. This is a very punchy and full sounding receiver (witness the 3dB 'headroom' spec). Very 'musical' sounding. Doesn't fall apart with larger speakers utilizing 15 inch drivers. This was their 'Top of the Line' model for that period with performance and specs to prove it. I actually sold this model when new, while working for a Vector Research dealer.
  Features include:
 
  - Quartz Locked, Digital Synthesized tuning (but still internally adjustable for technicians)
- 6 AM & 6 FM tuner presets
- A, B and A+B speaker selector
- Separate Bass, Mid & Treble with high quality de-tented controls
- Dual Analog 'VU' Power Meters with Dual Range Selector
- Dual tape deck monitors
  (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)
- Bi-Directional Tape Dubbing
- Phono / Turntable input
- AUX Input (may also be used for Video / CD / DVD / VCR / DAT / MP3 / XM / SIRUS etc.)
- Variable "Loudness" control normally found on Yamaha units
- Built-in Subsonic Filter to eliminate excess rumble from sources such as turntables
- Hi filter for reducing tape hiss / electronic hiss & noise and record static
- Stereo / Mono selector for FM tuner
- FM muting function
- Dual position FM De-emphasis selectable for 25 or 75 msec 
- 5-Segment LED indicators for tuning signal strength
- Dual AC convenience outlets located on the rear panel (1 switched @ 100 watts and 2 un-switched @ 200 watts for a total capacity of 300 watts)
  
Vector Research VRX-9000 Original Specs:
  "The Vector Research VRX-9000 Stereo Receiver has a continuous / RMS power output of 80 watts per channel min. @ 8 ohms from 20 hertz to 20,000 hertz with no more than 0.05% THD (measured utilizing AUX input)"
 
 POWER / PRE AMP SPECIFICATIONS:
 Freq Response / Bandwidth of power amp section;
 @ 80 watts / 8Ω  20-20kHz
 THD utilizing AUX;
 0.05% @ 80 watts 20-20kHz
 Dynamic Headroom; 3dB @ 8Ω
 TUNER SPECS FOR FM;
 Freq Response; 30-15kHz ±0.5 dB
 S/N; >70db Stereo
 S/N; >75db Mono
 50 dB Quieting Sensitivity:
 Mono 1.8 μV (15 dBf)
 Stereo 25 μV (35 dBf)
 Useable Mono Sensitivity (98 MHz, 30 dB Quieting); 9.8 dBf
 Capture Ratio; 1.0dB
 FM Selectivity; 65 dB
THD 100% modulation @ 1kHz mono / stereo; 0.06% / 0.07%
 
 PHONO SECTION SPECS;
 Freq Response; 20-20kHz
 S/N; 88 dB with MM cart.
 Overload limit; 180 mV
 
Again, as stated before, we have completely gone through this Vector Research VRX-9000, Stereo Receiver cleaning and testing all and it gets our full 'Certification' with only the 0.1Mhz readout issue. All functions test fine. This receiver looks near NEW, works and sounds great! Unit measures 17.25" wide x 5.5" tall x 15" deep and weighs 32 lbs unpacked. Includes our standard 90 day limited warranty.
VECTOR RESEARCH VRX-9000 STEREO RECEVIER
Cond. 8.5+
$489.00
(C) R.R.

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

 

        

    

NEW ADDITION 5/10/13
(Click on above thumbnails to enlarge photos)
  warranty
VINTAGE STEREO RECEIVER
SANSUI 2000X STEREO RECEIVER
 #...1204
   Circa '73-76
   "WORLD AC POWER" ™
MIJ
for sale

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

ü  Everything was cleaned inside and out including all contacts, switches, controls and I/O jacks.

ü  Control Pot shafts re-sprung.

ü  Internal and external fuses checked and replaced where necessary.

ü  Repaired power supply and power supply board

ü  Replaced ‘leaky’ transistors on driver board  (which by the way, once biased, brought the idle temperature of the heat-sink down from ~220 degrees to ~72°)

ü  All 4 power transistors removed and tested for leakage, the re-installed with fresh heat-sink compound applied.

ü  Repaired AM circuit board

ü  Re-flowed multiple solder joints

ü  We also aligned the tuner for optimum AM & FM performance as older internal tuner components have always drifted on vintage gear over the years.

ü  All meter, dial, and FM stereo lamps replaced for trouble-free service (very difficult to do on this series of receiver).

ü  Tuner string re-tensioned for improved flywheel 'grip'

ü  Amplifier section had output bias and DC offset adjusted to spec levels

ü  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.

ü  All inputs 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.

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 48 hours and into a 4 Ohm Load! You will not be disappointed. Total restoration / ‘tech time’ investment ~14 hours.

   While this unit was originally rated at 55 wpc, on our test bench, both this unit's amplifiers, #...1204 produced peak power of 17 volts per channel @ 8 ohms for 36 watts and 14.5 volts @ 4 ohms for 52 watts per channel via discrete, TO-3, metal cased outputs with 1 kHz input. (4x Toshiba 2SC793, (same as Sanken 2SC1111)). Idle current draw within spec. Floor noise measured at 2mV AC w/ AUX shunted).
  ____________________________
  
This 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. Lot's 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 does have a couple dings / 'battle scars', but nothing too distracting and certainly doesn't distract from it's performance.
   Features include:

§  Weighted flywheel, 'slide rule' style analog tuning

§  Dual Tuning Capacitors. One for FM and one for AM. Allows for incredibly 'quiet' tuning performance

§  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

§  Builtin Subsonic Filter to eliminate excess rumble from sources such as turntables

§  PreAmp Out / PowerAmp 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® / 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)

§  Aux inputs (may also be used for Video / CD / DVD /DAT / VCR / MP3 / iPod® / iPad® / iPhone® / iTouch® / iGadget / 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

         NEW LISTING 12/11/12
  (Click on above thumbnails to enlarge photos)
warranty
CLASSIC KENWOOD STEREO RECEIVER
KENWOOD KR-4200
#...0845
Circa 1973
MIJ
for sale
Our technician has completely gone through and 'Certified' this unit.  
- Everything was cleaned inside and out including cleaning inside and out including all contacts, switches and controls.  
- Output transistors removed and fresh heat sink compound applied.  
- As always, Bias current and DC offset checked for tolerable limits and adjusted when necessary and possible.  
- 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.  
- All meter and dial lamps replaced for trouble-free service.  
- All inputs 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 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!
  
On our test bench, both this unit's (#...0845) amplifiers produced peak power of 12.25 volts per channel @ 8 ohms for 18+ watts channel via discrete, TO-3, metal cased outputs with 1 kHz input. (2x NEC 2SA626 & 2x 2SD180). AC Idle current at .260A. Floor noise at 2.0mVAC either channel.
  ____________________________
  
This Kenwood KR-4200 stereo receiver would be great in a smaller office, bedroom, cabin system! Classic Brushed Silver, Smoke and Wood grain look. Green, backlit dial screen. Brushed face with matching, milled aluminum knobs. 
Kenwood KR-4200 Features include:
   
- Weighted Flywheel, 'Slide Rule', analog tuning
- A, B, or A+B speaker selector 
- Separate Bass and Treble controls featuring quality, 'de-tented' control pots
- Stereo / Mono selector for entire 'pre-amp' section, not just the tuner
- "Loudness" function to boost Bass and Treble in relationship to Mid frequencies at lower volume levels for a much fuller sound.
- Phono / Turntable input
- Dual, TRUE' tape monitors featuring both standard RCA and DIN 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® / 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 AUX Inputs (may also be used for Video / CD / DVD / VCR / DAT / MP3 / XM / SIRUS etc.)
- Front mounted 1/4" stereo headphone jack
- Analog VU Signal Strength meter for AM & FM tuning
- Built-in ferrite AM stick antenna
- Dual AC convenience outlets on rear panel, 1 'switched' for 60 Watts capacity, and 1 'un-switched' for 300 Watts
    
Kenwood KR-4200 Receiver specifications:
 
 POWER / PRE AMP SECTION:
 Freq Response / Bandwidth of power amp section;
 @ 19 watts / 8Ω  20-20,000 Hz w/ max dynamic power of 82 watts at 4 Ohms.
 THD utilizing AUX;
 < 1.0% @ rated output
 Input Sensitivity AUX / Tape; 150mV w/ 100k ohms impedance @ 1kHz
 Bass Control Characteristics;  ±10dB @ 50hz
 Treble Control Characteristics;  ±10dB @ 10khz
 
 TUNER SPECS FOR FM;
Quieting Sensitivity:
 Mono 2.3 μV
 FM Selectivity; >50 dB IHF
 FM separation;  >35dB @ 400Hz
 
    Again, as stated before, we have completely gone through this Kenwood KR-4200, stereo receiver, cleaning and testing all and it gets our full 'Certification'. Brushed aluminum face and knobs in like NEW condition. Unit looks and sounds great. Real Walnut Wood veneer case in great condition. Measures 17.25" wide x 13.75" deep x 5.25" tall and weighs 21 lbs unpacked. Comes with our standard 90 day limited warranty.
CLASSIC KENWOOD KR-4200 RECEIVER
Cond. 8.5+
$359.

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

NEW ADDITION 4/1/13
 (Click on above thumbnails to enlarge photos)
warranty
TECHNICS STEREO RECEIVER
TECHNICS SA-303 / SA303
Circa 1982-'84
M.I.J.
 for sale
Our technician has completely gone through and 'Certified' this unit.  
- Everything was cleaned inside and out including all switches, contacts, and controls cleaned for static free performance, complete cleaning inside and out.  
- He replaced all dial lamps for trouble-free service. Balance of all other indicators are ‘trouble-free’ LED’s.  
- Following bench service, unit had a full cosmetic detail inside and out.  
- With the exception of some minor scuffs on the tuning knob and around the headphone jack, the unit looks GREAT! All inputs 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!  
- 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 48 hours and into a 4 Ohm Load!
 
 On our test bench, the internal amplifiers of this particular unit, #...F486, produced 22 volts per channel at 8 ohms for 60 watts per channel and 18 volts at 4 ohms for 83 watts per channel via dual STK1039 power packs.
 ____________________________
 
 Very nice, compact size Silver face receiver. Great for smaller systems and anywhere depth space is at a premium, but you still desire the Classic Silver face / wood appearance.
 Features include:
 
- Weighted flywheel analog "slide-rule" tuning
- A or B or ‘OFF’ & A+B speaker selector
- Dual 5-segment LED power meters with range selector
- Separate Bass and Treble utilizing super quality "de-tented" controls
- "Loudness" function to boost Bass relationship to Mid frequencies at lower volume levels for a much fuller sound.
- FM Muting / Mono selector
- Hi filter for reducing tape hiss / electronic hiss & noise and record static
- Phono / Turntable input with Built-In Phono Pre-Amp
- Aux inputs (may also be used for Video / CD / DVD /DAT / VCR / MP3 / iPod® / iPad® / iPhone® / iTouch® / iGadget / MP3 / XM® / SIRUS®  etc.)
- 'Dual, TRUE' tape monitors 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, 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)
- 5-segment LED tuning Signal strength meter
- Externally located speaker protection fuses
- Rear mounted, un-switched AC convenience outlet.
 
Again, as stated before, we have completely gone through this Technics SA-303, stereo receiver, cleaning and testing all and it gets our full 'Certification'. These are great all around receiver for small to medium sized systems. Receiver functions and sounds Great. Unit measures 18 1/8" wide x 10.75" deep x 6" high and weighs 13 lbs unpacked. Includes our standard 90 day limited warranty.
 TECHNICS SA-303 STEREO RECEIVER
 Cond. 8.5
 $329.

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

 

What is a 'Receiver' and how is it different than a 'Tuner' or an 'Amp'?
The term 'Receiver' refers to a combined unit consisting of at least 3 aspects incorporated into one. The 3 basic units are the AM/FM 'Tuner' or radio, a 'Pre-Amplifier' / 'Control-Amp' and a 'Power-Amplifier' all combined in one 'box'. Originally the general consensus was that 'receivers' did not perform as well as 'separates' and were sonically inferior. While this may have been the case early on, as in the late 1950's to early '60's, technology improved quickly and by the mid-late 60's the arguments for separates over receivers for most 'mid-level' consumer Hi-Fi applications were generally without merit. For 95% of home-audio listeners, a receiver will be more than ample.

      

NEW ADDITION 4/16/13
(Click on above thumbnails to enlarge photos)
warranty
VINTAGE SCOTT 320R STEREO RECEIVER
SCOTT 320R 320
#...0011
 Circa 1978-80
MIJ
SOLD 5/1/13
SHIPPING TO CALIFORNIA
Our technician has completely gone through and 'Certified' this unit.
- Everything was cleaned inside and out including all switches, controls and contacts. Extensive cleaning of unit internally.
- Internal and external fuses checked for correct value / function and replaced where necessary.
- All output transistors removed and individually tested.
- Left channel output transistors replaced with fresh heat sink compound applied to all output devices of course.
 - 'Stuck' Power switch was repaired for proper operation.
- Amplifier section had output bias and DC offset adjusted to spec levels.
- All dial, meter, and indicator lamps were replaced.
- 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. (Receiver requires external FM and AM antenna connections.) 
- Peeling vinyl veneer replaced. Only cosmetic issues with this unit are some black marks on the right side / end of the unit and some minor wear on the top bonnet and minor scuffs to aluminum face / knobs.
- Following above procedures, all functions tested for perfect operation and 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! All functions tested for perfect operation. Following restoration procedures, the unit was ran 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!

 On our test bench, each internal amplifier of this particular unit, #...0011, produced peak power of 14.2 volts @ 8Ω per channel for 25 watts / channel and 12 volts @ 4Ω per channel for 36 watts / channel via Discrete output devices at 1khz.  Bias voltage adjusted to 40 mV per channel factory specification.  AC Idle current at 60mA, & floor noise <0.3.

 Nice Scott 320R Silver face receiver is great looking with the two-tone dial, large volume/balance knobs and a nice array of switch controls.  The DC Coupled power amplifier provided uncolored sound directly to the speakers. The 320R would make a great addition for a small-medium system or for an office or Bedroom.

Scott 320R Features Include:
 
 - Weighted flywheel analog "slide-rule" tuning
- PLL tuning circuit
 - Double Pair Separate Speaker Switches providing; A, B , A+B or both Off speaker operation (two pair at a time)
 - Separate Bass and Treble featuring Hi-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.
 - Oversize volume control featuring Hi-Quality, De-tented pot
 - Hi filter for reducing tape hiss / electronic hiss & noise and record static
- Phono / Turntable input with Built-In Phono Pre-Amp
 - True Tape Monitor with both RCA's and DIN 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® / 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)
 - Rear located, Dual speaker output protection fuses

 - Rear located, full barrier strip for external antenna connections
 - Un-Switched AC convenience outlet on rear panel

  Again, we have done the previously stated refurbishment / restoration work (~8+ hours) on this unit to insure it's performance, and it gets our full 'Certification' followed up with a 48 hour burn in. All functions tested for perfect operation. Only minor cosmetic issues are the one’s mentioned earlier. This particular unit, after restoration, has a VERY GOOD TUNER! FM reception STRONG AND CLEAN!!!
Unit measures 18.5" wide x 12.5" deep x 5.5" high and weighs 12 lbs unpacked. Comes with our 90 day limited warranty.
SCOTT 320R STEREO RECEIVER
 Cond. 8
SOLD 5/1/13
SHIPPING TO CALIFORNIA

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

 
 

 

NEW LISTING 4/19/13
(Click on above thumbnails to enlarge photos)
  warranty
VINTAGE SANSUI STEREO RECEIVER
SANSUI 5000X IN WOOD CABINET
#...3882
CIRCA 1973-76
MIJ
SOLD 4/23/13
SHIPPING TO INDIANA

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

ü  Everything was cleaned inside and out including all contacts, switches and controls.

ü  We also aligned the tuner for optimum AM & FM performance as older internal tuner components have always drifted on vintage gear over the years. VERY GOOD TUNER! AM reception WAY above average, FM reception incredible, PUNCHY and IMPECCABLY CLEAN!!! due to the triple FET FM front end and the quality of the restoration.

ü  All meter, dial, function indicator and FM stereo indicator lamps replaced for trouble-free service (very difficult to do on this series of receiver and there's a total of 12).

ü  All 4 power transistors removed, tested for leakage and reinstalled with fresh heat-sink compound.

ü  DC offset checked (although as it’s a ‘cap couple’ amp, there better not be any DC) and bias current adjusted to correct levels.

ü  Two stuck dual section controls were replaced and shafts lubed.

ü  Damaged illuminated dial indicator was replaced.

ü  Entire unit cleaned / detailed cosmetically inside and out. Only cosmetic issues with this unit are some scuffing of the wood cabinet and very minor wear on the face.

ü  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! All functions test fine.

ü  Following restoration procedures, the unit was run continuously at medium volume, as all our amplifiers / receivers are, into a load with "Loudness" on and both Tone Controls at 10 for 48 hours and into a 4 Ohm Load!

On our test bench, each internal amplifier of this particular unit, #...3882, produced peak power of 22 volts @ 8Ω per channel for 60 watts / channel and 19 volts @ 4Ω per channel for 93 watts / channel via Discrete output devices at 1khz. (4X Toshiba metal case TO-3 2SC1079). AC Idle current at .220A, & floor noise <1.4 mVAC.

  ____________________________
  
 This is from what many consider to be one of Sansui's best eras. The Sansui 5000X 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 quite a few 'X000' series Sansui units and they are among some of the best sounding, 'vintage', 'main stream' amplifiers we have heard.  Lot's 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.

   Sansui 5000X Features include:
  - Weighted flywheel, 'slide rule' style analog tuning
  - Dual Tuning Capacitors. One for FM and one for AM. Allows for incredibly 'quiet' tuning performance
  - A, B, C, Off, A+B or A+C speaker positions
  - Hi filter for reducing tape hiss / electronic hiss & noise and record static
- Low filter to eliminate excess rumble from sources such as turntables
 - Pre-Amp Out / Power-Amp In Loop (unique to the "X" version)
  - Aux (may also be used for Video / CD / DVD / VCR / DAT / MP3 / iPod® / iPad® / iPhone® / iTouch® / iGadget / MP3 / XM® / SIRUS® etc.) input
  - Dual tape monitors with Tape 1 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, 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
 - "Loudness" function to boost Bass and Treble in relationship to Mid frequencies at lower volume levels for a much fuller sound.
  - FM Stereo / Mono selector separate from the FM Muting selector
 - Stereo / Mono selector for Pre-Amp separate from the FM tuner selector
  - Stereo Reverse selector (great for trouble-shooting speakers)
  - FM Muting separate from the Stereo / Mono selector (this is commonly ‘combined’ on many units)
  - Rear located MPX Separation & Level adjustments
   - Front mounted 1/4" stereo headphone jack
   - Front mounted 1/4" Microphone Input jack and 1/4" Playback Jack (Tape 2)
  - Tuning window features dual VU meters for tuning and signal strength
 - Rear located speaker and main power protection fuses
 - Externally located, vertical heat sinks for very efficient cooling and long life  - Dual AC convenience outlets on rear panel with 1 switched and 1 un-switched
  - Triple Pair Speaker Selector: A, B, or C or A+B or A+ C or Off speaker selector (two pair at a time)
  - Tuning window features dual meters for 'Tuning' & station 'Signal Strength'
 - Rear located speaker and main power protection fuses
 - EXTERNALLY located, Vertically finned heat sinks for very efficient cooling and long life. External heat sinks keep the heat producing transistors outside of the receiver housing where they belong. All units should utilize this design.
- Built-In Ferrite 'Stick' AM antenna
  - Dual AC convenience outlets on rear panel with 1 switched and 1 un-switched
  - 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 Sansui 5000X Specifications:

POWER / PRE AMP SPECIFICATIONS:
Music Power: 200watts dynamic @ 4 Ohms
160 watts dynamic @ 8 Ohms
Cont rated RMS Power: 2 x 60 watts @ 8 Ohms, 20-20k & <0.5% THD
 THD: <0.5% @ full rated power
 IMD: <0.8% @ full rated power
  Power Bandwidth (IHF): 15Hz-30kHz
  Damping factor: 50 @ 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:  ±13dB @ 50hz
  Treble Control:  ±13dB @ 10khz
  High Filter:  -13dB @ 10kHz
  Low Filter:  -13dB @ 50Hz
  "Loudness" Contour:  +8dB @ 50hz & +3dB @ 10kHz (volume control @ -30dB)

  TUNER SPECS FOR FM:
  Tuning Range: 88-108mHz
Capture Ratio: 1.5dB
  S/N: > 65db Stereo
Select6ivity: >45 dB
Image Frequency Rejection: >93 dB at 98 MHz
IF Rejection: > 90dB at 98 MHz
  Spurious Response Rejection: >95dB
  THD 65dBf @ 1kHz, Mono:  <0.8%
Stereo Separation Ratio: >35dB @ 50Hz to 10kHz
 
  TUNER SPECS FOR AM:
  Tuning Range: 535-1605kHz
 IF (Image Frequency) Rejection: >90dB @ 1kHz
Selectivity: >30dB @ 1kHz
Useable Sensitivity (External Antenna / Bar Antenna): 15 μV/m / 250 μV/m
 
  PHONO SECTION SPECS:
  Freq Response: 20-20kHz
Channel Separation: > 40dB
  Input Sensitivity: 2.5 mV @ 50kΩ
  Max input: ~200 mV @ 50kΩ

Again, as stated before, we have completely gone through this Sansui 5000X, Stereo Receiver cleaning and testing all and it gets our full 'Certification'. This is probably the 'cleanest' Sansui Receiver in the optional wood case from this era we've ever had. This Sansui 5000X is also in the originally optional Walnut Wood Veneer Case that is in great condition and really sets its look. Very ‘Handsome’ unit. Receiver looks, performs and sounds great! 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. Includes a pdf 'e' copy of a '5000-Series' owners manual. Measures 17.25" wide x 14.5" deep x 5.5" deep and weighs a whopping 34 lbs unpacked. Comes with our standard 90 day limited warranty.
SANSUI 5000X STEREO RECEIVER W/ WOOD CABINET
Cond. 8.5+++
SOLD 4/23/13
SHIPPING TO INDIANA
(C) M.R.
 
(Above text, in it's entirety, property of www.oaktreevintage.com / Oak Tree Enterprises, LLC. See 'Copyright Information' page for details)

     

POWER / PRE AMP SPECIFICATIONS:
Cont rated Power: 2x 50 watts @ 8 Ohms / 20-20kHz / 60 watts @ 4 Ohms
THD; 0.1% @ 25w to full rated power / 0.05 THD @ 1 watt
Intermodulation Distortion (50 Hz-7 KHz=4:1 @ Aux In): 0.1% at full power / 0.05% 1W to 25W
Potential Freq Response; measured @ 1w; 10-50,000Hz ±0.0dB
IMD utilizing AUX;   0.1% @ full rated power / 20-20kHz
Damping factor: 30 @ 8Ω  / 20-20kHz
Signal / Noise Ratio: 100dB
Input Impedance: 50k Ohms
Input Sensitivity for Full Output: 1V
Input Sensitivity AUX / Tape: 150mv @ 50kΩ
Input Sensitivity Phono: 2.5mV @ 50kΩ
Input Sensitivity Mic: 5mV @ 50kΩ
Tape Output level:  150mv
Bass Control:  +8 dB / -7dB @ 100hz
Treble Control:  +7 dB / -6dB @ 10khz
Low Filter:  -6dB /Oct @ 15hz
"Loudness" Contour:  +6dB @ 100hz, +3dB @ 10khz (w/ volume set at -40dB)

TUNER SPECS FOR FM:
Freq Response: 30-15kHz
S/N Stereo: > 67db
S/N Mono: > 72db
Useable Mono Sensitivity: 10.7 dBf
Mono RF Sensitivity: 1.9 μV
Stereo usable Sensitivity: 9.8 μV
Capture Ratio: 1.0dB
Signal for 50dB quieting, Mono: 4.0 μV
Signal for 50dB quieting, Stereo: 50.0 μV
Signal for 50dB quieting, Mono: 17.2 dBf
Signal for 50dB quieting, Stereo: 39.2 dBf
De-Emphasis: selectable 25/75 μ-sec
THD w/ 100% modulation @ 1kHz, Mono: 0.15%
THD w/ 100% modulation @ 1kHz, Stereo: 0.30%
IF image Rejection: 85dB
IF Rejection: 100dB
Stereo Sub-Carrier Rejection: 62dB
AM Carrier Rejection: 55 dB
Spurious Rejection: 62 dB
Alternate Channel Selectivity: 80dB wide or narrow
Stereo Separation @ 1kHz: 40dB

TUNER SPECS FOR AM:
RF Sensitivity: 300 uV/meter or 15 uV @ binding posts
Alternate Channel Selectivity: 35 dB
IF Rejection: 65 dB
Image Rejection: 40 dB
Signal to Noise Ratio: 50 dB

PHONO SECTION SPECS:
Freq Response: 20-20kHz
S/N: 70 dB, ref w/ 10mV input
Input Sensitivity: 2.5 mV @ 50kΩ
Overload limit: 200 mV
 
Again, we have done the previously stated refurbishment / restoration work (17+ hours!) on this unit to insure it's performance, and it gets our full 'Certification'. All functions tested for perfect operation. This unit is in good condition however, there are a few minor veneer peels, and minor dings to the front panel edges, but nothing too distracting. The face is clean with only minor “dings” on the top.  The unit includes the original milled aluminum knobs!  Again VERY GOOD TUNER! FM reception incredible and IMPECCABLY CLEAN!!! Performs and sounds wonderful!!! If you're looking for one of these series you won't be disappointed in this one. Measures 19" wide x 15" deep x 6" high and weighs 41 lbs unpacked. Includes our standard 90 day limited warranty!
PIONEER SX-750
COND. 8+
$489.
SOLD 4/22/13
MICHAEL B. 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 4/15/13
(Click on above thumbnails to enlarge photos)
warranty
VINTAGE KENWOOD STEREO RECEIVER
KENWOOD KR-4070  KR4070
AM/FM STEREO RECEIVER
#...0774
Circa '77-'81
MIJ
SOLD 5/1/13
SHIPPING TO CALIFORNIA
  Our technician has completely gone through and 'Certified' this unit.
 Everything was cleaned inside and out including all switches, controls and contacts.
- Internal fuses checked for correct value / function and replaced where necessary.  
- Controls tightened to chassis.  
- Main circuit board repaired and damaged resistors replaced.
- Tuner MPX IC replaced.  
- All output transistors removed and individually tested. Fresh heat sink compound used of course.  
- Amplifier section had output bias and DC offset adjusted to spec levels.  
- All dial, meter and stereo indicator lamps were replaced.  
- We also aligned the tuner front-end, FM MPX and dial alignment on both AM & FM bands for optimum performance as older tuner components will have 'drifted' over the years.  INCREDIBLE TUNER! AM reception WAY above average, FM reception incredible, PUNCHY and MUSICAL and IMPECCABLY CLEAN!!!  
- Only cosmetic issues with this unit are minor scuffing on the bonnet and minor scratches on the face near the tuning knob) and a slight ‘off-center’ to the tuning knob when ‘spun’ (see photos above).  
- Following above procedures, all functions tested for perfect operation and 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! All functions tested for perfect operation.  
- Following restoration procedures, the unit was ran 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!
  
On our test bench, each internal amplifier of this particular unit, #...0774, produced peak power of 20 volts per channel for 50 watts per channel @ 8 ohm and 17.5 volts @ 4 ohm for 76 watts per channel via discrete output devices at 1khz. (2X 2SD588 & 2X 2SB618). AC Idle current at .3A, & floor noise <0.1 mVAC and DC offset adjusted to a SUPER LOW <5mV L&R.
  ____________________________
  
  Wonderful condition, late 70's silver face receiver from Kenwood. Great performance for a 'mid-sized' 2-Channel audio system. This is an INCREDIBLEY ‘Musical’ sounding receiver. The tone / pre-amp section very transparent and ‘glassy’ sounding, even with only the FM tuner as a source! Nice looking classic brushed aluminum face and knobs with only minor scuffs. 
  Kenwood KR-4070 Features:
  
  - Weighted flywheel analog slide rule tuning
  - A, B, A&B speaker selector
  - 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
  - Dual Analog back lit meters for center tuning and signal strength
- Phono / Turntable input with Built-In Phono Pre-Amp
   - '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® / 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)
   - Aux input (may also be used for Video / CD / DVD /DAT / VCR / MP3 / iPod® / iPhone® / iTouch® / iGadget / MP3 / XM® / SIRUS®  etc.)
  - Built-in AM ferrite antenna
  - Dual 200 watt convenience AC outlets with one being switched for a total of 400 watts capacity

Original Kenwood KR-4070 Specifications:

POWER / PRE AMP SPECIFICATIONS:
Power output: 40wpc min RMS @ 8 Ohms & no more than 0.1% THD @ 20-20kHz
40wpc min RMS @ 8 Ohms & no more than 0.1% THD @ 1kHz
50wpc min RMS @ 4 Ohms & no more than 0.1% THD @ 1kHz
THD: <0.05% @ 1 watt  / 1kHz & <0.1% @ full rated power into 8 ohms
IHF IMD: 0.1% @ full rated power, 0.05% at 1 watt @ 8 Ohms
Freq Response of power amp section: 10-40,000kHz
Damping factor: 40 @ 8Ω / 1kHz
Power Bandwidth: 10-40,000Hz
 
TUNER SPECS FOR FM:
Usable Sensitivity: 10.8 dBf (1.9 uV)
Tuning Range: 87.4- 109.7MHz
Freq Response: 20 – 15 KHz +-.5dB, -2 dB
S/N @ 65dBf: >72db Mono or 67dB Stereo
Capture Ratio: 1.0 Db
Image Response Ratio: 45 dB
Spurious Response Ratio: 75 dB

TUNER SPECS FOR AM:
Useable Sensitivity: 6 uV
Signal to Noise Ratio: 50 dB
Image Rejection: 50 dB
Selectivity: 34 dB
 
PHONO SECTION SPECS:
Freq Response: RIAA Standard curve +_0.3 dB, -0.3 dB
Input Sensitivity: 2.5mV @ 47K ohms/73 dB
Maximum Phono Input Level: 190 mV, THD 0.% at 1 KHz

Again, we have done the previously stated refurbishment / restoration work (~9+ 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.  Other than the previously mentioned wear, this unit is in great cosmetic condition! Looks and sounds great! Measures 18.5" wide x 6" tall x 16.5" deep and weighs an impressive 21 lbs unpacked. Includes our standard 90 day limited warranty.
Cond. 8.5
KENWOOD KR-4070 STEREO RECEIVER
SOLD 5/1/13
SHIPPING TO CALIFORNIA


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

     

NEW ADDITION 12/7/12
(Click on above thumbnails to enlarge photos)
warranty
VINTAGE STEREO RECEIVER
SANSUI 2000X
 #...1261
   Circa '73-76
   "WORLD AC POWER" ™
  MIJ
SOLD 1/14/13
SHIPPING TO NORTH CAROLINA
 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. We also aligned the tuner for optimum AM & FM performance as older internal tuner components have always drifted on vintage gear over the years. All meter, dial, and FM stereo lamps replaced for trouble-free service (very difficult to do on this series of receiver). All 4 power transistors removed and fresh heat-sink compound applied. Tuner string re-tensioned and flywheel string 'grip' improved. Amplifier section had output bias and DC offset adjusted to spec levels. 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 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 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!
  
   While this unit was originally rated at 55 wpc, on our test bench, both this unit's amplifiers, #...1843 produced peak power of 17 volts per channel @ 8 ohms for 36 watts and 14.7 volts @ 4 ohms for 54 watts per channel via discrete, TO-3, metal cased outputs with 1 kHz input. (4x Sanken 2SC1111, (same as Toshiba 2SC793)). DC offset adjusted to and measured at 2.6mVDC L&R. Idle current draw within spec. Floor noise measured at 6mVAC w/ AUX shunted.
  ____________________________
  
This 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. Lot's 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.
   Features include:
  
  - Weighted flywheel, 'slide rule' style analog tuning
  - Dual Tuning Capacitors. One for FM and one for AM. Allows for incredibly 'quiet' tuning performance
  - 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, 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)

- Aux inputs (may also be used for Video / CD / DVD /DAT / VCR / MP3 / iPod® / iPad® / iPhone® / iTouch® / iGadget / 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 trouble-shooting speakers)
  - FM Muting separate from the Stereo / Mono selector
 - FM MPX filter
  - 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
    
SPECS:

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 beautiful condition as well. 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 our standard 90 day limited warranty.
 SANSUI 2000X STEREO RECEIVER
   Cond. 8.5+
SOLD 1/14/13
SHIPPING TO NORTH CAROLINA

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

Did you know?
Sansui was founded in 1947, just after WWII as a company manufacturing transformers (one of the most important components of any audio system). During the Sixties they morphed into what would become one of the most well respected companies in quality audio gear. I have owned and sold some incredible Sansui stereo gear from the Seventies and early Eighties. I worked at a Sansui dealer in the early part of the Eighties. Sansui remained a major force in stereo gear until about the mid Eighties, when the vast majority of audio gear started suffering from the 'how cheaply can we get it' syndrome by consumers, thus manufacturers followed suit, by building cheaper and cheaper gear.
 

            NEW LISTING 10/13/12
(Click on above thumbnails to enlarge photos)
  warranty
VINTAGE STEREO RECEIVER
SANSUI 5000A
 #...0112
   Circa ~1970- ~'72
  MIJ
SOLD 2/23/13
SHIPPING TO GEORGIA
Our technician has completely gone through and 'Certified' this unit. Everything was cleaned inside and out including all contacts, switches and controls. We also aligned the tuner for optimum AM & FM performance as older internal tuner components have always drifted on vintage gear over the years. All meter, dial, function indicator and FM stereo indicator lamps replaced for trouble-free service (very difficult to do on this series of receiver and there's a total of 12). All 4 power transistors removed and tested for leakage. DC offset and bias current adjusted to correct levels. Entire unit cleaned / detailed cosmetically inside and out. All inputs 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 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!
  
   While this unit was originally rated at 55 wpc, on our test bench, both this unit's amplifiers, #...0112 produced peak power of ~20.45 volts per channel @ 8 ohms for 52 watts and 16.5 volts @ 4 ohms for 68 watts per channel via discrete, TO-3, metal cased outputs with 1 kHz input. (2x Toshiba 2SC1079 & 2x 2SD118). Idle current measured at 260mA. Bias current & DC offset / output adjusted to levels within spec. Floor noise measured at <4mVAC.
  ____________________________
  
 This is from what many consider to be one of Sansui's best eras. The Sansui 5000A stereo receiver. The "A" suffix designates upgraded driver boards over the original '5000'. 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. Lot's 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.

   Sansui 5000A Features include:
  
  - Weighted flywheel, 'slide rule' style analog tuning
  - Dual Tuning Capacitors. One for FM and one for AM. Allows for incredibly 'quiet' tuning performance
  - Speaker Damping Selector
  - A, B, C, A+B, A+C, 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
- 'Dual, TRUE' tape monitors 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, 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)

- 'Tape Head' direct input. Allows older 'transport only' Reel to Reel decks to operated as well as inputs from 'modified' Reel to Reel tape decks that have 'direct outputs' from the tape playback head to bypass the tape decks built-in electronics.

- Aux inputs (may also be used for Video / CD / DVD /DAT / VCR / MP3 / iPod® / iPad® / iPhone® / iTouch® / iGadget / MP3 / XM® / SIRUS®  etc.)
- Tape B to Tape A Dubbing capability

 - Phono / Turntable input with Built-In Phono Pre-Amp

 - "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 ('FM Auto')
  - Pre-Amp Stereo / Mono selector
  - Stereo Reverse selector (great for trouble-shooting speakers)
  - FM Muting separate from the Stereo / Mono selector
 - FM MPX filter
  - Rear located MPX Separation
- Rear Located 'Level' (output power limiter). Limits the amount of output someone can send to speakers as this unit is capable of fairly high power output.
- FM Dist / Loc selector
   - Rear located 'Speaker Damping Hi-Lo' Selector
   - Front mounted 1/4" stereo headphone jack
  - Tuning window features VU meter for 'Tuning' & station 'Signal Strength'
 - Rear located speaker and main power protection fuses
 - EXTERNALLY located, Vertically finned heat sinks for very efficient cooling and long life. External heat sinks keep the heat producing transistors outside of the receiver housing where they belong. All units should utilize this design.
- Built-In Ferrite 'Stick' AM antenna
  - Dual AC convenience outlets on rear panel with 1 switched and 1 un-switched
    
Sansui 5000A Original Specifications:

POWER / PRE AMP SPECIFICATIONS:
Music Power: 90watts dynamic @ 4 Ohms
70 watts dynamic @ 8 Ohms
Cont rated RMS Power: 2 x 55 watts @ 8 Ohms, 20-20k & <0.1% THD
 THD; <0.8% @ full rated power
 IMD; <0.5% @ full rated power
  Power Bandwidth (IHF); 10Hz-50kHz
  Damping factor; 50 @ 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
 Input Sensitivity 'Tape Head'; 2mV
  Bass Control;  ±12dB @ 50hz
  Treble Control;  ±12dB @ 10khz
  High Filter;  -13dB @ 10kHz
  Low Filter;  -13dB @ 50Hz
  "Loudness" Contour;  +8dB @ 50hz & +4dB @ 10kHz (volume control @ -30dB)

  TUNER SPECS FOR FM:
  Tuning Range; 88-108mHz
  Freq Response; 30-15kHz
Capture Ratio; 1.5dB
  S/N; > 60db Stereo
20dB Quieting Sensitivity Mono; 1.4μV
  FM Alternate Channel Selectivity; >50dB
  Spurious Radiation; <34dB
  Spurious Response Rejection; >90dB
 Image Rejection Ratio; >90dB
  THD 65dBf @ 1kHz, Mono;  <0.2%
Stereo Separation Ratio: >35dB @ 50Hz to 10kHz
 
  TUNER SPECS FOR AM:
  Tuning Range; 535-1605kHz
 IF (Image Frequency) Rejection; >90dB @ 1kHz
Selectivity; >30dB @ 1kHz
Useable Sensitivity (External Antenna / Bar Antenna); 15 μV/m / 250 μV/m
 
  PHONO SECTION SPECS:
  Freq Response; 20-20kHz
  THD; 0.8% @ 200 mV @ 1kHz
  Input Sensitivity; 2.5 mV @ 50kΩ
  Max input; ~200 mV @ 50kΩ

   Again, as stated before, we have completely gone through this Sansui 5000A, Stereo Receiver cleaning and testing all and it gets our full 'Certification' . This is the first Sansui 5000A we have refurbished in a few years. Other than some scuffs / scratches around the headphone jack, the aluminum face and knobs in like great condition. Unit looks and sounds great! 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. Includes a pdf 'e' copy of a '5000-Series' owners manual. Measures 17.25" wide x 14.5" deep x 5.5" deep and weighs a whopping 30 lbs unpacked. Comes with our standard 90 day limited warranty.
SANSUI 5000A STEREO RECEIVER
   Cond. 8.5
SOLD 2/23/13
SHIPPING TO GEORGIA

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

          

          NEW LISTING 7/13/12
  (Click on above thumbnails to enlarge photos)
warranty
VINTAGE SANSUI STEREO RECEIVER
SANSUI 8080 RECEIVER
 #...1680
 CIRCA 1977-79
 MIJ
SOLD 1/7/13
SHIPPING TO MICHIGAN
 Our technician has completely gone through and 'Certified' this unit. Everything was cleaned inside and out including all switches (actually accessed (requires 'splitting' the unit horizontally) and fully flooded), controls and contacts for quiet, positive operation. 
Extra attention is ALWAYS necessary on Sansui 8080 / 9090 units to the 'Input Selector' and 'Dolby / Tape-Monitor' switches, and they were completely disassembled, thoroughly cleaned, burnished, had contacts 're-sprung' and tested (only about half the 990's, 8080's and 9090's have input selector switches that will respond to cleaning only). On this unit, he actually bypassed the wafer portion that routes the dial light current, and direct wired the lights to be lit constantly (the issue with the dial lights on Sansui 880 / 8080-DB / 990 / 9090-DB series receivers is that the contacts were, by design, too anemic to handle the 1 Amp+ current they require).  He also re-flowed all dial lamp solder joints, especially at the 'extremes' of the board. Now dial lamps light solidly and inputs sonically intact. DC measurements taken 'post-preamp', 'post driver board' and 'post power amp'. 'Sansui 2624-Driver-Board 'removed, inspected / tested component by component & contacts burnished. Once reseated, DC measurements re-taken. Once driver board was tested, then the tech moved to address the output transistors. All output transistors removed and individually tested. Fresh heat sink compound used of course. Green 'LED' Power indicator's 'current limiting' circuit components replaced as necessary. 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. VERY GOOD TUNER! Generally AM reception in a stereo receiver is treated as an 'after thought', but the AM reception on this 8080, #...1680 is WAY above average. VERY GOOD TUNER! FM reception as well great and IMPECCABLY CLEAN!!! All dial, all meter (including the very difficult to replace power meter lamps  ), all function indicator and stereo indicator lamps replaced with new units for trouble-free service. Dial light solder contacts re-flowed. Also we 'painstakingly' replaced the 'dial pointer' lamp. The dial string was cleaned and re-tensioned. Once unit's electronics were addressed, the unit was cosmetically detailed inside and out. The extruded aluminum face great shape after detailing. The knobs are intact, but do have numerous 'flea bits' and minor scuffs on them. Internal and external dial screen and window in perfect shape. We removed the dial window and re-finished the black mask behind it. The lower wood strip that would normally be on the bottom of the face plate is missing. All inputs tested, including phono input, and both amplifiers 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. The Walnut wood grain, vinyl wrapped in good condition with minor wear. Following restoration procedures, the unit was operated 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 and into a 4 Ohm Load!
  
  On our test bench, this particular Sansui 8080, #...1680, amplifiers each produced 27.8 volts per channel for 96 watts per channel @ 8 Ω via discrete output & 23 volts per channel for 132 watts per channel @ 4 Ω via discrete, Metal cased, original TO-3 outputs (Sanken 4x  2SC1116 output transistors).
 (AC draw at idle 280mA tested,
DC offset adjusted to <0.5mV each side.)
  ___________________________ 
  
  Here's the second Sansui 8080 we've had, that's made it all the way through our restoration with no 'terminal' issues, since 2003! These receivers are known for great AM/FM tuners, and amplifiers that you can "darn near weld with". The tuner quality on both AM & FM is exceptional due to aspects such as a fully shielded tuning capacitor . The amps are incredibly warm sounding with HUGE punch and headroom. Very "Musical" sounding with real output transistors and huge power supplies.  A testament to the strength of the power supply is that the results we achieved on the test bench.
The difference in tone of an 8080, with a 'clean bill of health', and most other receivers is astronomical. Sort of like the difference between driving a 130hp car and a 400hp car or a 350cc bike and and 1100cc Harley. It's a difference that must be experienced to be appreciated.
  Features include:
 
  -Weighted flywheel analog, 'slide rule' dial tuning
 - HUGE internal Power Supply
 - Real Metal Cased, TO-3 output transistors for lot's of punch and tone!!!!
-Huge, EXTERNALLY LOCATED, 'Vertical' heat sinks for the most efficient passive cooling (all units should follow this example. Keeps the heat outside the unit, where it belongs)
- 4-Way Protection (Fuses 'on everything', Thermal Protection, DC surge Protection, and a 'Current Limiter')
  - A, B, A+B & Off speaker selector
- Classic and handsome''SLIVER FACE'
  - Gorgeous "Aqua" back-lit slide rule face and tuning meters (amber back-lit power meters)
- 6-Gang tuning capacitor
- PLL tuning circuit
  - Analog 'Tuning' and 'Signal' strength VU meters
  - Dual Analog 'Power' / 'Dolby' Calibration VU meters
  - Separate Bass, Midrange 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 Muting Selector (separate from the 'Stereo' selector)
 - Stereo / Mono selector for all inputs
  - Hi filter for reducing tape hiss / electronic hiss & noise and record static
  - Built-in 'Low' Filter to eliminate excess rumble from sources such as turntables
  - -20dB Audio Muting for instant lowering of volume without adjusting the volume control. Great for ringing phones and cuing a record on your turntable
  - Phono / turntable inputs with Built-In Phono Pre-Amp
   - Dual tape monitors with Tape monitor 'B' also featuring 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® / 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 'Dubbing' capability
- Aux input (may also be used for Video / CD / DVD /DAT / VCR / MP3 / iPod® / iPhone® / iTouch® / iGadget / MP3 / XM® / SIRUS®  etc.)
- Dolby Loop can be used as an additional input or as a signal processor loop for EQ, Dynamic Range Expanders, Reverbs, Delays, DBX units, etc.
  - Microphone input with Level Control (turns the unit into the ultimate Karaoke Machine (be very careful with your speakers when inserting a mic into a stereo receiver)
  - 1/4", stereo headphone jack
-Bi-Color 'Power-Protection' indicator
- Pre-Amp / Power-Amp I/O loop
 - External AC main line protection fuse
  - 2x AC convenience outlets 1 switched and 1 un-switched with a total output capacity of 250 watts

Original Sansui 8080 Specifications:

POWER / PRE AMP SPECIFICATIONS:
RMS Power, Continuous Rated: 2 x 80 watts @ 8 Ohms & <0.2% THD @ 20Hz-20,000Hz
&
2 x 90 watts @ 8 Ohms & <0.2% THD @ 1kHz
 Rated Freq Response of power amp section;
 measured @ 1w; 10-30,000Hz +/-1dB
 THD; measured @ 80w RMS = <0.2%
 IMD; measured @ 80w RMS = <0.2%
  Hum and Noise;  80dB on AUX / Tape w/ 150mV input
Damping factor; 30 @ 8Ω / 1kHz
Input Sensitivity; 150mV @ 50kΩ on AUX / Tape
Pre-Amp Output Level 1 or 2;  775mV
Main Power Amp Input Sensitivity;  775mV @ 100kΩ
  Bass Control;  ±10dB @ 50hz
 Mid Control;  ±10dB @ 1.5khz
  Treble Control;  ±10dB @ 10khz
"Loudness" Contour;  +8dB @ 50hz, +6dB @ 10khz (w/ volume set at -30dB)
  Low Filter;  -10dB @ 50Hz @ 6dB Oct
  High Filter;  -10dB @ 10kHz @ 6dB Oct
DOLBY NR Effect;  -10dB @ 'Tape' and 'Dolby FM' (which doesn't exist anymore for 'FM', but works for Dolby Tapes)
  MAX Power Consumption; 650 watts

  TUNER SPECS FOR FM:
  Tuning Range; 88-108mHz
  Freq Response; 30-15kHz
Capture Ratio; <1.5dB
S/N: > 70db Mono / >65db Stereo
FM Alternate Channel Selectivity; >85dB
  AM Suppression Ratio; >55dB
Image Response Ration; >70dB @98Mhz
IF Response Ration; >95dB @98Mhz
Spurious Noise Ratio; >85dB @98Mhz
Stereo Separation; 
>35dB @ 100Hz
>40dB @ 1kHz
>28dB @ 10kHz
  Useable 50dB Mono Sensitivity (IHF); 3.0 μV / 14.7 dBf
  Useable 50dB Stereo Sensitivity (IHF); 36 μV / 36.3 dBf
  Useable Mono Sensitivity; 9.8dBf / 1.7μV
  THD 65dBf @ 1kHz, Mono;  <0.2% @ 1V
  THD 65dBf @ 1kHz, Stereo;  <0.3% @ 1V

 TUNER SPECS FOR AM:
Tuning Range; 535-1605kHz
  Useable Sensitivity; 50dB / m with ferrite stick antenna
Selectivity; >50dB @ 1kHz
Image Response Ration; >30dB @ 1kHz
IF Response Ration; >30dB @ 1kHz
 
  PHONO SECTION SPECS:
 S/N; >70dB
  Input Sensitivity for rated output of 125 wpc RMS; 2.5 mV @ 50kΩ
  Max input; 180mV RMS  @ 1kΩ w/ <0.2% dist

This Sansui 8080 classic stereo receiver is great looking and fabulous sounding! Again, we have done EXTENSIVE refurbishment / restoration work (~16+ hours) on this unit to insure it's performance, and it gets our full 'Certification'. With the exception of a few very minor 'tic' marks on knobs, the face plate & window are in great cosmetic condition (see photos above). The 'typically broken' Sansui 8080 AM antenna socket still intact and 'un-broken'. The Walnut grain, vinyl wrapped case is in great shape with only minor wear! Looks VERY impressive and sounds great! This thing is incredible when lit up at night or in a dark room!! Includes an 'e-copy' of the Sansui 9090 owners manual (will be applicable to the 8080) & Service manual. Measures 21.5" wide x 7.25" tall x 15.75" deep and weighs and heavy 46 lbs unpacked. Includes our standard 90 day limited warranty.
SANSUI 8080 STEREO RECEIVER
  Cond. 8.5
(C) M.R.
SOLD 1/7/13
SHIPPING TO MICHIGAN

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

            NEW LISTING 7/28/128
  (Click on above thumbnails to enlarge photos)
warranty
  CLASSIC SANSUI STEREO RECEIVER
 SANSUI 350A
 #...0707
   Circa '73-75
   "WORLD AC POWER" ™
  MIJ
SOLD 2/27/13
SHIPPING TO MARYLAND
Our technician has completely gone through and 'Certified' this unit. Everything was cleaned inside and out including cleaning inside and out including all contacts, switches and controls. Speaker switch replaced with another, original Sansui 350A speaker switch. 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. All meter and dial lamps replaced for trouble-free service. Amplifier section had output bias and DC offset adjusted to spec levels. All inputs 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 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!
  
On our test bench, both this unit's amplifiers produced peak power of 12.5 volts per channel @ 8 ohms for 19 watts and 10.4 volts @ 4 ohms for 27 watts per channel via discrete, TO-3, metal cased outputs with 1 kHz input. (4x Hitachi 2SC1030). AC Idle current at .1A, DC offset output <4mvDC either channel. Floor noise at 2.5mVAC either channel.
  ____________________________
  
   This Sansui 350A stereo receiver would be great in a smaller office, bedroom, cabin system! Classic Silver, Smoke and Wood grain look. Green, backlit dial screen. Brushed face with black knobs. 
   Features include:
   
   - Weighted flywheel analog tuning
   -  A or B speaker selector 
   - Separate Bass and Treble controls
   - Stereo / Mono selector
 - MPX Filter for removing the 19kHz pilot tone from FM broadcasts
 - "Loudness" function to boost Bass and Treble in relationship to Mid frequencies at lower volume levels for a much fuller sound.
   - Phono / Turntable input
 - TRUE' tape monitor
  (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)
   - AUX Input (may also be used for Video / CD / DVD / VCR / DAT / MP3 / XM / SIRUS etc.)
    - Front mounted 1/4" stereo headphone jack
   - Analog VU Signal Strength meter for AM & FM tuning
   - Built-in ferrite AM stick antenna
 - DX / Local tuner sensitivity switch on rear panel
   -  Switched AC convenience outlet on rear panel
   - True “WORLD AC POWER
    as it will work on both 50 or 60 Hz AC and voltages from 110-240 volts AC
    
Sansui 350A Receiver specifications:
 
 POWER / PRE AMP SECTION:
 Freq Response / Bandwidth of power amp section;
 @ 20 watts / 8Ω  30-30,000 Hz
 THD utilizing AUX;
 < 1.0% @ rated output
 Damping factor; 45 @ 8Ω full bandwidth
 Signal / Noise ratio;  70dB @ AUX / Tape
 65dB @ Phono MM
 Input Sensitivity AUX / Tape; 150mV w/ 100k ohms impedance @ 1kHz
 Channel Separation with AUX or Phono @ 1kHz; 
 > 50 dB
 Bass Control Characteristics;  ±10dB @ 50hz
 Treble Control Characteristics;  ±10dB @ 10khz
 "Loudness" Contour;  +8dB @ 50Hz & +3 @ 10kHz
 
 TUNER SPECS FOR FM;
 S/N; > 60db Stereo
 20 dB Quieting Sensitivity:
 Mono 2.5 μV
 Capture Ratio; 3dB
 FM Selectivity; >32 dB
 Spurious Response Ratio; >70 dB
 AM Suppression Ratio; 65 dB
 FM separation;  >30dB @ 400Hz
 
 TUNER SPECS FOR AM;
 Useable Sensitivity; 350μV / m with loop antenna @ 1kHz
 Selectivity; >20dB
 Spurious Response Ratio; >55dB
 
 PHONO SECTION SPECS;
 Input Sensitivity; 2.2 mV w/ MM w/ 5k ohms impedance @ 1kHz
 
    Again, as stated before, we have completely gone through this Sansui 350A, stereo receiver, cleaning and testing all and it gets our full 'Certification'. Brushed aluminum face and knobs in like NEW condition. Unit looks and sounds great. Wood grained, vinyl case in great condition. Includes an 'e' copy of the original Sansui 350A brochure. Measures 16.5" wide x 13" deep x 6" tall and weighs 24 lbs unpacked. Comes with our standard 90 day limited warranty.
 CLASSIC SANSUI 350A RECEIVER
   Cond. 8.5
SOLD 2/27/13
SHIPPING TO MARYLAND

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

         NEW ADDITION 5/9/12
 (Click on above thumbnails to enlarge photos)
warranty
 VINTAGE TECHNICS STEREO RECEIVER
SA-222
 #...E488
 Circa 1982-86
  MIJ
SOLD 2/23/13
SHIPPING TO ARIZONA
Our technician has completely gone through and 'Certified' this unit. Everything was cleaned inside and out including all switches, contacts, and controls cleaned for static free performance, complete cleaning inside and out, analog dial scale lamp replaced and all functions tested. We inspected and cleaned the tuner back-up battery compartment. Amplifier section had output bias and DC offset adjusted to spec levels. Following bench service, unit had a full cosmetic detail inside and out. All inputs 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! 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 48 hours and into a 4 Ohm Load!
  
   On our test bench, each internal amplifier of this particular unit, Technics SA-222, #E488 produced 19 volts @ 8 Ω per channel for 45 watts / channel and 15 volts @ 4 Ω per channel for 56 watts / channel via STK-2028 Power Pack.
(DC offset output adjusted to: <5mV on each side. AC draw at idle <0.3A tested.)
  ____________________________
  
  Nice Technics, SA-222 stereo receiver.  Classic silver faced construction and a nice sleek style. This unit is ideal for a small office or dorm room. 
  Features include:
  
  - Digital, Quartz Lock AM / FM tuning
  - Auto or Manual station scanning
  - 14 Random AM and FM station presets with battery back-up
  - Fluorescent Digital station readout
  - 5-Segment LED signal strength meter
  - Auto selector for tuning scanner
  - Very Unique Analog style tuning scale that automatically moves an analog pointer to a position relative to the digital frequency readout
  - De-tented, separate Bass & Treble

- "Loudness" function to boost Bass relationship to Mid frequencies at lower volume levels for a much fuller sound.
  - FM muting / Stereo / Mono selector
 - Phono / Turntable input
 - Dual 'TRUE' tape monitors
  (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)
- Aux inputs (may also be used for Video / CD / DVD /DAT / VCR / MP3 / iPod® / iPad® / iPhone® / iTouch® / iGadget / MP3 / XM® / SIRUS®  etc.)
   - Front mounted ¼" stereo headphone jack
  - Main & Remote speaker positions
  - An AC convenience un-switched outlet on rear panel with for 150 watts capacity
  
     Again, as stated before, we have completely gone through this Technics SA-222, stereo receiver, cleaning and testing all and it gets our full 'Certification'. These are great all around receiver for small to medium sized systems. We have used a Technics SA-222  in one of our offices for years! Unit looks and sounds great! Measures 17" wide x 12.5" deep x 5" tall and weighs an impressive 12 lbs unpacked. Includes our standard 90 day limited warranty.
  Technics SA-222
  Cond. 8.5
SOLD 2/23/13
SHIPPING TO ARIZONA

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

warranty

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

** "(actual as measured)" refers to original test results done by Hirsch-Houck Laboratories upon test release of product when new. Current "aged" specifications / performance may of course vary from that.