Quartz Synthesizer FM/AM Stereo Tuner ST-S31

Technics (brand)

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  • Year
  • 1981
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 154488

 Technical Specifications

  • Number of Transistors
  • Semiconductors present.
  • Semiconductors
  • Main principle
  • PLL, Phase-locked loop
  • Wave bands
  • Broadcast (BC) and FM or UHF.
  • Details
  • Hi-Fi equipment
  • Power type and voltage
  • Alternating Current supply (AC) / 110; 120; 220; 240 Volt
  • Loudspeaker
  • - For headphones or amp.
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: Quartz Synthesizer FM/AM Stereo Tuner ST-S31 - Technics brand
  • Shape
  • Book-shelf unit.
  • Dimensions (WHD)
  • 430 x 53 x 245 mm / 16.9 x 2.1 x 9.6 inch
  • Notes

  • Slimline digital tuner with quartz synthesizer tuning of up to 16 preset stations (8FM, 8AM). Auto-scan tuning. Normal/super-narrow IF bandwidth selection. Dual function FL display, pre-set channel number/received frequency. Frequency shift switch, FM +25kHz. Signal strength display. Available in black or silver. RCA phono Line Out sockets, Control Input socket, MW step Allocation selector switch and terminals for AM antenna and for 75Ω and 300Ω FM antennae.

    Specification  
    FM Tuner section  
    Frequency range: 87.50-108.00MHz
    Sensitivity: S/N 26dB 1.8µV (300Ω), 0.9µV (75Ω).
    THD Mono 0.08%, Stereo 0.15%.
    Frequency response: 20Hz-15kHz, +0.5dB, -1.5dB.
    Capture ratio: 1.0dB
    Stereo separation: (1kHz), 50dB (10kHz) 40dB.
    AM Tuner section  
    Frequency range: MW 522-1611kHz (9kHz step), 530-1620kHz (10kHz step)
    Sensitivity: 20µV 300µV/m
    Output  
    Output voltage 0.6V

    Versions/Power Requirements
    Continental Europe / 220V AC 50/60 Hz
    Australia / 240V AC 50/60 Hz
    Others / 110V/120V/220V/240V AC 50/60 Hz with voltage selector

    Power consumption  8W

    Similar to the Technics ST-S31L Quartz Synthesizer FM/MW/LW Stereo Tuner which additionally has LW.

  • Literature/Schematics (1)
  • - - Manufacturers Literature (Service Manual Technics ST-S31)
  • Author
  • Model page created by Franz Scharner. See "Data change" for further contributors.

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