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Stereo 2 + Quadradial 4 Receiver 4270

Stereo 2 + Quadradial 4 Receiver 4270; Marantz Sound United (ID = 2115512) Radio Stereo 2 + Quadradial 4 Receiver 4270; Marantz Sound United (ID = 1385048) Radio
Stereo 2 + Quadradial 4 Receiver 4270; Marantz Sound United (ID = 1385049) Radio Stereo 2 + Quadradial 4 Receiver 4270; Marantz Sound United (ID = 1385050) Radio
Stereo 2 + Quadradial 4 Receiver 4270; Marantz Sound United (ID = 1385052) Radio Stereo 2 + Quadradial 4 Receiver 4270; Marantz Sound United (ID = 2026636) Radio
Stereo 2 + Quadradial 4 Receiver 4270; Marantz Sound United (ID = 2026637) Radio Stereo 2 + Quadradial 4 Receiver 4270; Marantz Sound United (ID = 2026638) Radio
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Stereo 2 + Quadradial 4 Receiver 4270; Marantz Sound United (ID = 2115512) Radio
Marantz Sound United: Stereo 2 + Quadradial 4 Receiver 4270 [Radio] ID = 2115512 1390x666
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For model Stereo 2 + Quadradial 4 Receiver 4270, Marantz (Sound United LLC); Vista, CA
 
Country:  United States of America (USA)
Manufacturer / Brand:  Marantz (Sound United LLC); Vista, CA
Year: 1973–1977 Category: Broadcast Receiver - or past WW2 Tuner
Semiconductors (the count is only for transistors) Semiconductors present.
schematic requested
Main principle Superheterodyne (common); ZF/IF 455/10700 kHz
Wave bands Broadcast (BC) and FM or UHF.
Details Radio Control (+Remote Wire etc)
Power type and voltage Alternating Current supply (AC) / 110; 120; 220; 240 Volt
Loudspeaker - This model requires external speaker(s).
Power out 140 W (undistorted)
from Radiomuseum.org Model: Stereo 2 + Quadradial 4 Receiver 4270 - Marantz Sound United LLC;
Material Metal case
Shape Book-shelf unit.
Dimensions (WHD) 440 x 137 x 365 mm / 17.3 x 5.4 x 14.4 inch
Notes

A stereo/quadradial receiver with an AM/FM tuner and integrated amplifier with power output of 2 x 70 watts RMS into 8 ohms or 4 x 25 watts RMS into 8 ohms, housed in a metal case (a wooden case an optional extra). Preamplifier and Power amplifier sections can be separated. With a "Vari-Matrix" circuit which simulates 4 channel sound from 2 channel stereo sound and will reproduce any discrete 4 channel program as well as stereo and mono. Also optional plug-in SQ decoders for any specific matrix system eg: the Marantz SQA-1 SQ Adaptor for the CBS SQ system. PLL FM stereo MPX decoder. Built-in 2 channel Dolby unit. Meters for Signal Strength/Dolby output Level and FM Tuning, gyro-touch tuning wheel, Bass, Mid and Treble rotary tone controls. On the rear, a DIN socket for optional RC-4 wired remote control, terminals for AM and FM antennae, an AM ferrite rod aerial, input sockets for Phono, Tape 1, Tape 2 and CD-4 Aux, a Power Mode switch for 2 x 70 watts stereo or 4 x 25 watts quadrophonic output, 16 terminals for 8 pairs of loudspeakers, (4 Front, 4 Rear), two jacks for Headphones, front and rear, etc.

Specification 
FM Section 
Tuning Frequency Range88-108MHz
IHFM Usable Sensitivity2.3µV
IHF Selectivity60dB
Capture Ratio1.6dB
Image Rejection Ratio at 106MHz70dB
Signal to Noise Ratio70dB (Mono), 60dB (Stereo)
Total Harmonic Distortion0.2% (Mono), 0.3% (Stereo)
Frequency Response30Hz-15kHz ±1dB
Stereo Separation at 1KHz40dB
Quadradial Output (400Hz 75kHz dev.)300mV
AM Section 
Tuning Frequency Range540-1605kHz
Usable Sensitivity 30µV
Selectivity26dB
Image Rejection Ratio at 1400kHz 70dB
Signal to Noise Ratio45dB
Frequency Response (-6dB)50Hz-3.5kHz
Total Harmonic Distortion1%
Audio Section 
Rated Continuous (RMS) Output
all channels driven at 40Hz-20kHz
for Less than 0.3% harmonic distortion
25W into 8Ω
25W into 4Ω
13W into 16Ω
Intermodulation distortionLess than 0.3% harmonic distortion
Input Impedance/Sensitivity 
  Phono
  Line
47kΩ/2.2mV for 25W output
100kΩ/150mV for 25W output
Frequency Response20Hz-20kHz ±1.0dB at 1W output
Damping FactorMore than 45 at 8Ω

Versions/Power requirements
120V AC 50/60Hz
220V AC 50Hz
110/120/220/240V AC 50/60Hz with voltage selector

Power consumption: 400 watts

Designed in USA, Produced in Japan

Dauerleistung 2 x 70 Watt oder (wahlweise) 4 x 25 Watt  (20 - 20.000Hz an 8 Ohm).

Net weight (2.2 lb = 1 kg) 18.6 kg / 40 lb 15.5 oz (40.969 lb)
Mentioned in -- Original prospect or advert (1976-77 Hauptkatalog and two 1977 Marantz catalogues)
Literature/Schematics (1) - - Manufacturers Literature (Service manual Marantz 4270)
Literature/Schematics (2) Funk-Technik (FT) (21/1973, S. 798 / Neuvorstellung, Messe Berlin)
Literature/Schematics (3) - - Manufacturers Literature (Handbook of Instructions Marantz 4270)

Model page created by Peter Hoddow. See "Data change" for further contributors.



All listed radios etc. from Marantz (Sound United LLC); Vista, CA
Here you find 539 models, 530 with images and 84 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.




  
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