Servo Locked Stereo Tuner TX-7800

Pioneer Corporation; Tokyo

Data
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  • Year
  • 1979/1980
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 151105

 Technical Specifications

  • Main principle
  • Superheterodyne (common)
  • 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
  • Various materials
  • from Radiomuseum.org
  • Model: Servo Locked Stereo Tuner TX-7800 - Pioneer Corporation; Tokyo
  • Shape
  • Book-shelf unit.
  • Dimensions (WHD)
  • 420 x 150 x 390 mm / 16.5 x 5.9 x 15.4 inch
  • Notes

  • A hi-fi AM/FM stereo tuner with an analogue dial with sliding station markers housed in a black metal case (HG and S models) or a walnut grain wooden case (S/G model). With a radio station frequency Servo Lock circuit and Touch-Sensor tuning. With Signal strength and Tuning meters, Stereo and FM Locked indicators, a rotary Output Level control, switches for Function (FM/AM), AM IF Band (Wide/Narrow), MPX Noise Filter, FM Muting/Mode, a built-on adjustable AM Ferrite bar antenna, terminals for AM and FM antennae and Ground, RCA phono sockets for Multipath Output, Fixed and Variable Line Output, Touch Sensor gain switch (High/Low), Voltage Selector, AC outlet and an FM De-Emphasis switch (25µs, 50µS, 75µS) on the S and S/G models.

    Specification  
    Semiconductors ICs 7, FETs 2, Transistors 11, Diodes 30
    FM Section 87.5 - 108MHz
    Usable Sensitivity MONO: 9.3dBf (1.6µV)
    50dB Quieting Sensitivity MONO:     15.5dBf (3.3µV)
    STEREO:  37.1dBf (39.2µV)
    Sensitivity (DIN) MONO: 1.1µV, STEREO: 37µV
    Signal-to-Noise Ratio at 65dBf MONO: 83dB, STEREO: 79dB
    Distortion at 85dBf: 100Hz Mono:  0.08%, Stereo: 0.1%
    1kHz   Mono:  0.05%, Stereo: 0.08%
    10kHz Mono:  0.06%, Stereo: 0.3%
    Capture ratio 1.0dB
    Alternate Channel Selectivity 75dB
    Stereo Separation 1 kHz: 50dB, 20Hz-10kHz: 35dB
    Frequency Response 20Hz-15kHz, +0.2dB,-0.5dB
    Spurious Response Ratio 95dB
    Image Response Ratio 85dB
    IF Response Ratio 100dB
    AM Suppression Ratio 65dB
    Muting Threshold 19.2dBf (5µV)
    Antenna Input 300Ω balanced, 75Ω unbalanced
    AM Section 150-350kHz
    Sensitivity IHF, ferrite antenna        300µV/m
    IHF, external antenna     15µV
    Selectivity WIDE: 15dB
    NARROW: 50dB
    Signal-to-Noise Ratio 50dB
    Image Response Ratio 45dB
    IF Response Ratio 50dB
    Antenna Ferrite Loopstick Antenna
    Audio Section  
    Output (Level/Impedance)  
    FM (100% MOD.) FIXED: 650mV/4.2kΩ
    VARIABLE: 0mV to 1.3V/3.6kΩ
    AM (30% MOD.) FIXED: 200mV/4.2kΩ
    VARIABLE: 0mV to 400mV/3.6kΩ

    Versions/Power Requirements
    HG model       /  AC 220V, 240V 50/60Hz voltage selector
    S, S/G model  /  AC 110V, 120V, 220V, and 240V 50/60Hz voltage selector

    Power Consumption: 20W (HG model),  23W (S, S/G models)

    The dimensions and weight above are for the HG and S models, the S/G model dimensions (WHD) are 453 x 155 x 390mm and weighs 8.3kg

    AM/FM-Stereo-Tuner mit Servo-Regelung, Berührungssensor-Abstimmung

  • Net weight (2.2 lb = 1 kg)
  • 7.5 kg / 16 lb 8.3 oz (16.52 lb)
  • Source of data
  • -- Original prospect or advert
  • Mentioned in
  • -- Original prospect or advert (1979/90 Hi-Fi Stereo catalogue)
  • Literature/Schematics (1)
  • - - Manufacturers Literature (Service manual TX-7800)
  • Literature/Schematics (2)
  • - - Manufacturers Literature (Operating Instructions TX-7800)
  • Author
  • Model page created by Franz Scharner. See "Data change" for further contributors.

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