NEW LISTING 10/10/12
(Click on above thumbnails to enlarge photos)
  warranty
VINTAGE MARANTZ STEREO RECEIVER
MARANTZ TWENTY SEVEN / MARANTZ 27
 #...4476
 Circa 1970-73
 MIJ
for sale
SOLD 11/5/12
SHIPPED TO SOUTH DAKOTA
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. All internal fuses checked for correct values and replaced where necessary. He replaced the questionable power switch. All dial & meter lamps were replaced, as well as the 'stereo' indicator with new bulbs, for trouble-free service. We also aligned the tuner for optimum performance on both AM and FM including realigning the 'local osc'. AM reception on this Marantz 'Twenty Seven', #...4476 is above average. VERY GOOD TUNER! FM reception as well great and IMPECCABLY CLEAN!!! Dial pointer track was cleaned of old lube and re-lubed w/ silicone grease. Output bias adjusted correctly for clean output. DC offset adjusted to less than 2mV / Ch. All functions tested for perfect operation. Power supply adjusted to correct voltage. All inputs tested and both sides produce clean and even sine waves! Tone control shafts have a bit of 'play' in the bushings, but simply from 30+ years of age (short of replacing them, they are what they are, and still function fine electronically). Following restoration procedures, the unit was run at medium volume, as all our amplifier / receivers are, into a load with "Loudness" on and both Tone Controls at 10 for 72 hours. All functions test perfectly. Following electronic refurb, entire unit was cosmetically detailed inside and out. Only 'cosmetic' issue is light 'splotching' on the wood case, but nothing too distracting (see photos above). Total restoration time investment ~7 hours.
 


 On our test bench, this unit of this Marantz Twenty Seven / 27 receiver #...4476...,  

HEY, WHY ALL THE 'X'd' OUT / OMITTED SPECS AND TEXT?

  
 
Early and 'Elegant' Marantz stereo receiver from the early 1970's.
'Build Quality' features:

HEY, WHY ALL THE 'X'd' OUT / OMITTED SPECS AND TEXT?

  Features include:
  

HEY, WHY ALL THE 'X'd' OUT / OMITTED SPECS AND TEXT?

  
 Marantz Twenty Seven / 27 Stereo Receiver Original Specifications:
   "The Marantz 27 has a continuous power output of xx watts per channel min. @ 8 or 4 ohms fromxx hertz toxx hertz with no more than xxx THD (measured utilizing AUX input)"
IHF (Institute of High-Fidelity) / Comparable 'Music' power = xx watts @ 8 Ohms
  
 POWER / PRE AMP SPECIFICATIONS:
 Rated RMS Power / Channel; x
IHF Power / Channel; xxWPC @ 8 Ohms
THD: <0x
Rated Freq Response; xxHz
 Power Bandwidth; xxxHz
IMD utilizing AUX; xx% @ 8Ω
High Level Input Sensitivity / Impedance; xxmV / xxk Ohms
Tape Output Level / Impedance; xV / 7k Ohms @ 1Khz
Treble Control; xxdB @ xxkhz
Bass Control; xxdB @ xxhz
Low Filter; xdB / Oct @ xxhz
 
 TUNER SPECS FOR FM:
 Freq Response: xxkHz
Useable IHF Mono RF Sensitivity: >xx μV
Quieting Slope: xxdB & xμV, xxdB & xxμV, xxdB &xxμV
 Capture Ratio: xdB (INCREDIBLE!)
Alternate Channel Selectivity; xxdB
 THD w/ 100% modulation @ 400Hz, Mono / Stereo:  0.xx% / xx%
 Stereo Separation @ 1kHz: xxdB
Spurious Rejection: >xxdB
67kHz Suppresion: >xxdB

 TUNER SPECS FOR AM:
Useable AM Sensitivity: xxμV

PHONO SECTION SPECS:
Input Sensitivity: xxmV @ xxkΩ
  
 Again, as stated before, we have completely gone through this Marantz Twenty Seven / 27, Stereo Receiver cleaning and testing all and it gets our full 'Certification'. With the exception of the above mentioned, 'splotching' to a section of the wood case (see photos above) the unit is near perfect cosmetically. The brushed aluminum face and all original, milled knobs in great shape. After restoration, receiver looks, performs and sounds great! This unit features Marantz's 'Variable Overlap Drive' technology, to virtually eliminate crossover distortion. In addition, this circuit compensates for internal component 'aging' insuring 'like new' performance for many years to come. According to an original Marantz Twenty Seven Brochure states; "The Model 27 delivers 60 Watts RMS. Most receiver manufacturers measure power by such ratings as 'Music Power' or 'Peak Power'. Marantz measures power by the only reliable method - RMS power. Marantz 60 watts sounds more powerful than 180 Watts music power, because Marantz power is delivered throughout the entire audio spectrum, from 20Hz-20kHz (both channels driven), at or below the rated distortion. Marantz guarantees that you receive 60 Watts RMS."  This is a VERY 'Musical' sounding tuner/pre/power-amp. Very 'full, warm and phat'. Great 'low-end' depth at any volume. Tone controls have a lot of influence. Overall a pleasing unit to listen to in all aspects. Measures 15" wide x 16.5" deep x 7" high and weighs 35 lbs unpacked. Includes our standard 90 day limited warranty!
MARANTZ Twenty Seven / 27 STEREO RECEIVER
  Cond. 8.5
(C) R.R.
SOLD 11/5/12
SHIPPED 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 10/12/11
  (Click on above thumbnails to enlarge photos)
  warranty
VINTAGE MARANTZ 'BLUE FACE' STEREO RECEIVER
VINTAGE STEREO RECEIVER
MARANTZ MODEL 2220B
#...0883
Circa 1974-77
(actual internally dated 1976)
Classic 'Blue Face'
MIJ
SOLD 10/27/11

     

(Click on above thumbnails to enlarge photos)
warranty

VINTAGE MARANTZ 'BLUE FACE' STEREO RECEIVER
MARANTZ 2230 #2
Circa '71-'73
SOLD 12/18/05

 NEW LISTING 12/5/09
(Click on above thumbnails to enlarge photos)
warranty
VINTAGE MARANTZ STEREO RECEIVER
MARANTZ 2235B38
#...0680
Circa 1977-79
MIJ
SOLD 12/21/09
 

      

NEW LISTING 10/10/12
(Click on above thumbnails to enlarge photos)
  warranty
VINTAGE MARANTZ QUADRAPHONIC / STEREO RECEIVER
MARANTZ 4240
#...0302
Circa 1974-76
Classic 'Blue Face'
MIJ
SOLD 10/22/12
SHIPPED TO PENNSYLVANIA
Our technician has completely gone through and 'Certified' this unit. Everything was cleaned inside and out including all contacts, switches (requires extensive removal of front chassis assembly and circuit boards), controls and I/O jacks. All internal fuses checked for correct values. He disassembled and 're-built' the power switch (as the original is better than the substitutions available) and corrected some previous erroneous wiring. He also replaced the original, and frayed tuner dial string with new, and proper dial cord (never an easy operation). Found another previous, 'non-factory' mod to the 2 / 4 channel power amp selector and restored to original 'schematic design'. All indicator lamps and all 8 dial & meter lamps were replaced, as well as the lamps in the 'dial pointer' with new bulbs, for trouble-free service. We also aligned the VERY sophisticated tuner for optimum performance on both AM and FM. Generally AM reception in a stereo receiver is treated as an 'after thought', but the AM reception on this Marantz 4240, #...0302 is WAY above average (frankly it's amazing). VERY GOOD TUNER! FM reception as well great and IMPECCABLY CLEAN!!! Dial pointer track was cleaned of old lube and re-lubed w/ silicone grease. We also replaced a 'questionable' 'Speaker A' output clip with original. Wave form issues with driver boards / outputs corrected. Output bias adjusted correctly for clean output as well as the DC offset to a low level. All functions tested for perfect operation. Power supply adjusted to correct voltage. Output transistors removed and fresh heat sink compound applied. All inputs tested and both sides produce clean and even sine waves! Tone controls are super quality, Alps brand, "full-size", de-tented potentiometers. As the original wood grain metal case had some issues, we had it chemically stripped by a furniture refinisher and a coat of 'pro' quality primer laid down, followed by a couple of coats of black 'hammer-tone' finish. Looks nice.
Following restoration procedures, the unit was run at medium volume, as all our amplifier / receivers are, into a load with "Loudness" on and both Tone Controls at 10 for 72 hours. Following electronic refurb, entire unit was cosmetically detailed inside and out. All functions test perfectly. Total restoration time investment ~20+ hours.

HEY, WHY ALL THE 'X'd' OUT / OMITTED SPECS AND TEXT?

  
 
Classic 'Blue Face' Marantz, 4240 Four-Channel-Quad / stereo receiver. Elegant looking Face is milled from a solid plank of Aluminum with matching milled aluminum controls. This unit looks great!
  Features include:

HEY, WHY ALL THE 'X'd' OUT / OMITTED SPECS AND TEXT?

  
 Marantz 4240 Stereo Receiver Original Specs:
   "The Marantz 4240 has a continuous power output of ...

HEY, WHY ALL THE 'X'd' OUT / OMITTED SPECS AND TEXT?

  
 POWER / PRE AMP SPECIFICATIONS:

HEY, WHY ALL THE 'X'd' OUT / OMITTED SPECS AND TEXT?

  

TUNER SPECS FOR FM:

HEY, WHY ALL THE 'X'd' OUT / OMITTED SPECS AND TEXT?

  

TUNER SPECS FOR AM:

HEY, WHY ALL THE 'X'd' OUT / OMITTED SPECS AND TEXT?

  
 
PHONO SECTION SPECS:

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Again, as stated before, we have completely gone through this Marantz 4240, Stereo Receiver cleaning and testing all and it gets our full 'Certification' with 20+ hours of tech time. Brushed aluminum face and all original, milled knobs in fabulous shape. After restoration, receiver looks, performs and sounds great! This is a VERY ....

HEY, WHY ALL THE 'X'd' OUT / OMITTED SPECS AND TEXT?

  ....aspects. Comes with a pdf 'e' copy of the Marantz 4240 owners / users / operation manual. Measures 17.5" wide x 14" deep x 5.5" high and weighs 35 lbs unpacked. Includes our standard 90 day limited warranty!
MARANTZ 4240 QUAD / STEREO RECEIVER
  Cond. 8.5+
SOLD 10/31/12
SHIPPED TO PENNSYLVANIA

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

     

NEW LISTING 10/10/12
(Click on above thumbnails to enlarge photos)
  warranty
VINTAGE MARANTZ QUADRAPHONIC / STEREO RECEIVER
MARANTZ 4270
#...0202
Circa 1973-78
Classic 'Blue Face'
MIJ
SOLD 10/22/12
Our technician has completely gone through and 'Certified' this unit. Everything was cleaned inside and out including all contacts, switches (requires extensive removal of front chassis assembly and circuit boards), controls and I/O jacks. All internal fuses checked for correct values. All indicator lamps and all 8 dial & meter lamps were replaced, as well as the lamps in the 'dial pointer' with new bulbs, for trouble-free service. We also aligned the VERY sophisticated tuner for optimum performance on both AM and FM. Generally AM reception in a stereo receiver is treated as an 'after thought', but the AM reception on this Marantz 4270, #...0202 is WAY above average (frankly it's amazing). VERY GOOD TUNER!
 

FM reception as well great and IMPECCABLY CLEAN!!! Dial pointer track was cleaned of old lube and re-lubed w/ silicone grease. Output bias adjusted correctly for clean output as well as the DC offset to a low level. All functions tested for perfect operation. Power supply adjusted to correct voltage. Output transistors removed and fresh heat sink compound applied. All inputs tested and both sides produce clean and even sine waves! Tone controls are super quality, Alps brand, "full-size", de-tented potentiometers. Looks nice.
Following restoration procedures, the unit was run at medium volume, as all our amplifier / receivers are, into a load with "Loudness" on and both Tone Controls at 10 for 72 hours. Following electronic refurb, entire unit was cosmetically detailed inside and out. All functions test perfectly. 
  
On our test bench, the amplifiers of this Marantz 4270 receiver #...0202, in '2-Channel' mode, produced xxx Volts @ 8 Ω per channel for xx Watts / channel. In '4-Channel' / Quadraphonic mode each channel produced xx Volts  @ 8 Ω for xx x 4 Watts and xx Volts @ 4 Ω for xx x 4 Watts via discrete, TO-3 style, original metal cased output devices at 1khz. (8x Hitachi 2SC897)

HEY, WHY ALL THE 'X'd' OUT / OMITTED SPECS AND TEXT?

 AC current at idle measured at xxxA. DC offset adjusted to produce <xxmV out of any of the 4 channels. Bias set correctly for clean sine waves and correct draw.
 
Classic and 'Blue Face' Marantz, 4270 'BIG', Four-Channel-Quad / stereo receiver. Elegant looking Face is milled from a solid plank of Aluminum with matching milled aluminum controls. This unit looks great!
  Features include:

HEY, WHY ALL THE 'X'd' OUT / OMITTED SPECS AND TEXT?

  
  
 Marantz 4270 Stereo Receiver Original Specs:
   "The Marantz 4270 has a continuous power output...

HEY, WHY ALL THE 'X'd' OUT / OMITTED SPECS AND TEXT?

  
 POWER / PRE AMP SPECIFICATIONS:

HEY, WHY ALL THE 'X'd' OUT / OMITTED SPECS AND TEXT?

  

TUNER SPECS FOR FM:

HEY, WHY ALL THE 'X'd' OUT / OMITTED SPECS AND TEXT?

  

TUNER SPECS FOR AM:

HEY, WHY ALL THE 'X'd' OUT / OMITTED SPECS AND TEXT?

  
 
PHONO SECTION SPECS:

HEY, WHY ALL THE 'X'd' OUT / OMITTED SPECS AND TEXT?

  
  
Again, as stated before, we have completely gone through this Marantz 4270, Stereo Receiver cleaning and testing all and it gets our full 'Certification'. Brushed aluminum face and all original, milled knobs in fabulous shape. After restoration, receiver looks, performs and sounds great! This is a VERY ...

HEY, WHY ALL THE 'X'd' OUT / OMITTED SPECS AND TEXT?

  ... at any volume. Tone controls have a lot of influence. .... Comes with a pdf 'e' copy of the Marantz 4270 owners / users / operation manual. Measures 17.25" wide x 15.5" deep x 6" high and weighs 36 lbs unpacked. Includes our standard 90 day limited warranty!
MARANTZ 4270 QUAD / STEREO RECEIVER
Cond. 8.5+
SOLD 10/22/12

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