FM Stereo Tuner ST-P7J

Sony Corporation; Tokyo

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  • Year
  • 1979–1981
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 210680

 Technical Specifications

  • Number of Transistors
  • 32
  • Semiconductors
  • Main principle
  • PLL, Phase-locked loop; ZF/IF 10700 kHz
  • Wave bands
  • FM Broadcast Band Only
  • Details
  • Hi-Fi equipment
  • Power type and voltage
  • Alternating Current supply (AC) / 120; 220; 240 Volt
  • Loudspeaker
  • - For headphones or amp.
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: FM Stereo Tuner ST-P7J - Sony Corporation; Tokyo
  • Shape
  • Book-shelf unit.
  • Dimensions (WHD)
  • 215 x 80 x 330 mm / 8.5 x 3.1 x 13 inch
  • Notes

  • A hi-fi FM stereo Quartz Locked Synthesizer Tuner with a digital frequency display, housed in a silver metal case, a Sony Precise P7 Series Hi-Fi mini component. With LED signal strength and stereo indicators, push buttons for Tuning Up and Tuning Down, Auto Tuning and Manual Tuning, Memory Scan, Stereo, Muting, Memory and 8 keys for preset radio stations. On the back, terminals for FM antennae and RCA phono sockets for Line Output.

    Specification  
    Tuner Section  
    System  PLL crystal-locked digital synthesizer system
    Tuning Range 87.5MHz - 107.9MHz (US model)
    87.5MHz - 108MHz (AEP, UK model)
    Antenna Terminals 300Ω balanced, 75Ω unbalanced coaxial input
    Sensitivity (40kHz deviation)  
      at 50dB quieting (US model) 16.1dBf, 3.5µV (mono), 37.3dBf, 40µV (stereo)
      at 46dB quieting (AEP, UK model) 3.2µV (mono), 35µV (stereo)
    Usable Sensitivity  
      IHF
      (AEP, UK model)    		 10.3dBf, 1.8µV
    1.2µV (S/N = 26 dB, 40kHz deviation)
    S/N Ratio (40kHz deviation) 77dB (mono), 72dB (stereo) (US model)
    68dB (mono), 64dB (stereo) (AEP, UK model)
    Harmonic Distortion at 100Hz
    (40kHz deviation)    		 0.06% (mono), 0.08% (stereo) (US model)
    0.1% (mono), 0.3% (stereo) (AEP, UK model)
    IM Distortion (40kHz deviation) 0.06% (mono), 0.08% (stereo) (US model)
    0.1% (mono), 0.2% (stereo) (AEP, UK model)
    Separation at 100Hz 48dB
    Frequency Response 40Hz - 12.5kHz ±0.2dB (AEP, UK model)
    30Hz - 15kHz +0.2dB,-0.5dB
    Selectivity at 400kHz 85dB (US model)
    at 300kHz 80dB (AEP, UK model)
    Capture Ratio 1.0dB
    AM Suppression Ratio 60dB
    Image Response Ratio 85dB
    IF Response Ratio 95dB
    Spurious Response Ratio 100dB
    Muting and Auto-Tuning
    Threshold    		 Approx. 5µV
    Output Level (75kHz deviation) 750mV, 4kΩ

    Versions/Power Requirements
    US model  / 120V AC 60Hz
    UK model  / 240V AC 50/60Hz
    AEP model / 220V AC 50/60Hz

    Power Consumption: 13 W

    Semiconductors: 16 IC's, 29 Transistors, 3 FET's, 16 LED's, 42 Diodes
    Weight: Approx. 3.2 kg (US model), Approx. 3.6 kg (AEP, UK model)

    Quartz Locked Synthesizer Tuner mit 50 kHz Raster. LED-Feldstärke-Display, 8 Stationstasten, automatischer Sendersuchlauf, digitale Frequenzanzeige.
    Baustein der Sony Syscon "Precise Serie P7".

  • Net weight (2.2 lb = 1 kg)
  • 3.6 kg / 7 lb 14.9 oz (7.93 lb)
  • Mentioned in
  • -- Original prospect or advert (Sony Prospekt "Sony'80HighFidelty" - Seiten 14 und 15)
  • Literature/Schematics (1)
  • - - Manufacturers Literature (Service manual Sony ST-P7J dated 1979)
  • Literature/Schematics (2)
  • -- Original prospect or advert (1981 Sony Audio catalogue)
  • Author
  • Model page created by Franz Scharner. See "Data change" for further contributors.

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