AM-FM Stereo Tuner KT-7550

Kenwood, Trio-Kenwood Inc.; Komagane

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  • Year
  • 1977–1979
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 326099
    • alternative name: Trio Corp.
    • Brand: Jennen

 Technical Specifications

  • Number of Transistors
  • Semiconductors present.
  • Semiconductors
  • Main principle
  • Superheterodyne (common)
  • Wave bands
  • Broadcast (BC) and FM or UHF.
  • Details
  • Hi-Fi equipment
  • Power type and voltage
  • Alternating Current supply (AC) / 120; 110-120; 220-240; 220 Volt
  • Loudspeaker
  • - For headphones or amp.
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: AM-FM Stereo Tuner KT-7550 - Kenwood, Trio-Kenwood Inc.;
  • Shape
  • Book-shelf unit.
  • Dimensions (WHD)
  • 430 x 149 x 377 mm / 16.9 x 5.9 x 14.8 inch
  • Notes

  • A hi-fi AM-FM stereo tuner with an analogue dial housed in a titanium metal case. With Signal and Tuning meters, AM, FM and Stereo indicators, rotary Tuning and Output Level controls, switches for IF Band (Wide, Narrow) and Muting (On, Off), and a rotary Selector switch (AM, FM Auto, FM MPX Filter, FM Mono). On the rear, an adjustable AM bar antenna, terminals for AM and FM antennae, RCA phono sockets for Fixed and Variable Line Output and FM Multipath, and an FM De-Emphasis switch (75µs, 50µs). Other de-emphasis options depending on market.

    Specification  
    FM TUNER SECTION (IHF)  
    FM Frequency Range 88 - 108 MHz
    Usable Sensitivity 9.8dBf (1.7µV)
    50dB Quieting Sensitivity 14.1dBf (2.8µV) Mono, 36.1dBf (35µV) Stereo
    Signal to Noise Ratio 75dB (Mono), 70dB (Stereo)
    Total Harmonic Distortion  
    Mono at 1kHz
               15kHz    		 0.08% WIDE, 0.2% NARROW
    0.15% WIDE, 0.15% NARROW
    Stereo at 1kHz
                 15kHz    		 0.1%  WIDE, 0.3% NARROW
    0.5%  WIDE, 1.5% NARROW
    Capture Ratio 1.0dB WIDE, 2.0dB NARROW
    Alt. Channel Selectivity 30dB WIDE, 100dB (400kHz) NARROW
    Stereo Separation  
      at 1kHz
        15kHz    		 50dB WIDE, 45dB NARROW
    40dB WIDE, 30dB NARROW
    Frequency Response 20Hz-15,000Hz +0.2dB,-1.5 dB
    Spurious Response Ratio 110dB
    Image Response Ratio 105dB
    IF Response Ratio  110dB
    AM Suppression Ratio 60dB
    Sub Carrier Product Ratio  65dB
    Antenna Impedance 300Ω balanced, 75Ω unbalanced
    Output Level at 400Hz 100% Mod Fixed: 0.75V/1.2kΩ, Variable 0-1.5V/1.2kΩ
    Multipath Output Vertical: 0.2V/5kΩ, Horizontal 0.3V/5kΩ
    FM DET. Out 0.3V/5kΩ
    AM TUNER SECTION  
    Usable Sensitivity 14µV
    Signal to Noise Ratio 50dB
    Total Harmonic Distortion 0.5%
    Image Rejection 60dB
    Selectivity 35dB
    Output Level Fixed 0.15V, Variable 0-0.3V

    Versions/Power Requirement
    USA & Canada model  /  120V AC 60Hz
    Europe model  /  120/220V AC 50/60Hz switchable
    Scandinavia model  /  220V AC 50/60Hz
    UK, Australia & others model  /  110-120/220-240V AC 50/60Hz switchable

    Power Consumption: 20 watts

    Similar to the Kenwood KT-7500 AM-FM Stereo Tuner which is housed in a silver cabin

  • Net weight (2.2 lb = 1 kg)
  • 7.6 kg / 16 lb 11.8 oz (16.74 lb)
  • Mentioned in
  • -- Original prospect or advert (1977-78 and 1978-79 Kenwood Hi-Fi Stereo catalogues)
  • Literature/Schematics (1)
  • - - Manufacturers Literature (Service manual Kenwood KT-7500 (KT-7550) dated 1977)
  • Author
  • Model page created by Howard Craven. See "Data change" for further contributors.

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