Stereo Tuner TX-8500II (2)

Pioneer Corporation; Tokyo

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  • Year
  • 1977/1978
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 250308

 Technical Specifications

  • Number of Transistors
  • Semiconductors present.
  • Semiconductors
  • Main principle
  • Superheterodyne (common)
  • Wave bands
  • Broadcast (BC) and FM or UHF.
  • 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: Stereo Tuner TX-8500II - Pioneer Corporation; Tokyo
  • Shape
  • Book-shelf unit.
  • Dimensions (WHD)
  • 420 x 150 x 395 mm / 16.5 x 5.9 x 15.6 inch
  • Notes

  • A hi-fi AM/FM stereo tuner with an analogue dial housed in a metal case, a wooden cabinet is optional. With Tuning Meter, Signal Meter, Stereo Indicator lamp, Rec Level Check, IF Band Switch (Wide & Narrow). With terminals for AM and FM antennae, built on adjustable AM bar antenna, RCA phono sockets for Fixed and Variable Line Output and FM adaptor, Unswitched AC Outlet max. 200 Watts.

    Specification  
    Semiconductors FET 3, ICs 6, Transistors 11, Diodes 16
    FM Section  
    Circuitry MOS FET 1-stage RF amplifier 4-gang variable
    capacitor, IF Band Selector, double balanced NFB
    type PLL MPX built-in pilot signal auto canceller.
    Usable Sensitivity Mono: 10.3dBf (1.8µV)
    50dB Quieting Sensitivity Mono: 16.1dBf (3.5µV), Stereo: 37.2dBf (40µV)
    S/N Ratio at 65dBf Mono: 79dB, Stereo: 75dB
    Distortion at 65dBf: MONO:  1kHz  0.08% (Wide)  0.15% (Narrow)
    STEREO: 1kHz  0.1%  (Wide)  0.4% (Narrow)
    Capture Ratio 0.8dB (Wide)  2.0dB (Narrow)
    Alternate Channel Selectivity 35dB (Wide)   80dB (Narrow)
    Stereo Separation 1 kHz: 45dB (wide) 45dB (narrow)
    50Hz-15kHz: 35dB (wide) 30dB (narrow)
    Frequency Response 20Hz-10kHz ±0.2dB
    20Hz-15kHz +0.2dB,-0.5dB
    Spurious Response Ratio 90dB
    Image Response Ratio 85dB
    IF Response Ratio 100dB
    AM Suppression Ratio 55dB
    Muting Threshold 19.2dBf (5µV)
    Antenna Input 300Ω balanced, 75Ω unbalanced
    AM Section  
    Circuitry 1-stage RF amplifier, 2-gang variable capacitor
    Sensitivity: (IHF, Ferrite antenna) 300µV/m
    (IHF, Ext. antenna)    15µV
    Selectivity 30dB
    S/N Ratio 50dB
    Image Response Ratio 45dB
    IF Response Ratio 50dB
    Antenna Built-in ferrite loopstick antenna
    Audio Section  
    Output Level/Impedance FM (100% MOD.) FIXED: 650mV/4.2kΩ
    VARIABLE: 50mV to 1.3V/3.6kΩ
    AM (30% MOD.)  FIXED: 200mV/4.2kΩ
    VARIABLE: l5mV to 400mV/3.6kΩ

    Versions/Power requirements

    KC 120V AC 60Hz with de-emphasis select switch (25µs/75µs) Canada
    KU 120V AC 60Hz with de-emphasis select switch (25µs/75µs) U.S.
    HG     220 and 240V AC 50/60Hz (switchable) Scandinavia
    S 110,120,220 & 240V AC 50/60Hz (switchable)
    with de-emphasis select switch (25µs/50µs/75µs)    		 General Export

    Power Consumption 20 Watts

  • Net weight (2.2 lb = 1 kg)
  • 8.1 kg / 17 lb 13.5 oz (17.841 lb)
  • Mentioned in
  • -- Original prospect or advert (1977/78 Pioneer Hi-Fi Stereo catalogue)
  • Literature/Schematics (1)
  • - - Manufacturers Literature (Service Manual TX-8500II)
  • Author
  • Model page created by Franz Scharner. See "Data change" for further contributors.

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