SQ Decoder SQD-2020

Sony Corporation; Tokyo

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  • Year
  • 1973
  • Category
  • Audio Amplifier or -mixer
  • Radiomuseum.org ID
  • 210367

 Technical Specifications

  • Number of Transistors
  • 69
  • Semiconductors
  • Main principle
  • Audio-Amplification
  • Wave bands
  • - without
  • Details
  • Hi-Fi equipment
  • Power type and voltage
  • Alternating Current supply (AC) / 120; 100; 127; 220; 240 Volt
  • Loudspeaker
  • - For headphones or amp.
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: SQ Decoder SQD-2020 - Sony Corporation; Tokyo
  • Shape
  • Book-shelf unit.
  • Dimensions (WHD)
  • 400 x 149 x 327 mm / 15.7 x 5.9 x 12.9 inch
  • Notes

  • A Hi-Fi SQ (Stereo Quadraphonic) decoder. 

    Stand alone SQ Decoder; SQ, Regular Matrix and Discrete Modes
    2 and 4 Channel Tape Monitor
    4 Illuminated VU Meters
    Rear Tone Controls
    4 Independent Level Set Controls
    Master Volume Control.

    Specification  
    Circuit system SQ decoder with front-back and
    waveform comparator logic circuits,
    Regular matrix decoder
    Semiconductors 69 transistors, 84 Diodes
    Frequency response 20Hz to 20kHz
    Input sensitivity/impedance  
      FRONT PREAMP
      2CH TAPE
      4CH TAPE
      REC/PB (input)
      DISCRETE    		 250mV/100kΩ
    750mV/100kΩ
    750mV/100kΩ
    750mV/100kΩ
    250mV/100kΩ
    Output level/impedance  
      FRONT PREAMP
      OUTPUT HIGH
      OUTPUT LOW
      2CH REC OUT
      4CH REC OUT
      REC/PB (output)    		 500mV/5kΩ
    2V/5kΩ
    500mV/5kΩ
    250mV/5kΩ
    250mV/5kΩ
    30mV/82kΩ
    Signal-to-noise ratio greater than 80dB (weighting network A)
    SQ separation Input (250mV 2kHz)  
      Lf-Rf
      Lb-Rb
      Lf-Lb
      Rf-Rb
      Lf-Rb
      Rf-Lb
      Cf-Cb    		 20dB or more
    14dB or more
    20dB or more
    20dB or more
    20dB or more
    20dB or more
    15dB or more
    Harmonic distortion (Input; 250mV 2kHz) less than 0.1% at each channel

     Versions/Power requirements

    USA Model AC 120V 60Hz
    Canada Model AC 120V 60Hz
    AEP Model AC 100, 127, 220, 240V 50/60Hz with voltage selector

    Power consumption: 15W

  • Net weight (2.2 lb = 1 kg)
  • 5.9 kg / 12 lb 15.9 oz (12.996 lb)
  • Source of data
  • - - Data from my own collection
  • Mentioned in
  • -- Original prospect or advert (1973-74 Sony Proogramm Ubersicht catalogue)
  • Literature/Schematics (1)
  • - - Manufacturers Literature (Service manual SQD-2020 and Correction both dated 1973)
  • Literature/Schematics (2)
  • - - Manufacturers Literature (Owner's Instruction manual SQD-2020)
  • Author
  • Model page created by Gerald Grösgen. See "Data change" for further contributors.

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The model SQ Decoder is part of the collections of the following members.

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