Natural Sound FM Stereo Tuner CT-7000 USA & Canada model

Yamaha Co.; Hamamatsu

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  • Year
  • 1974–1978
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 327069
    • alternative name: Nippon Gakki

 Technical Specifications

  • Number of Transistors
  • 108
  • Semiconductors
  • Main principle
  • Superheterodyne (common)
  • Wave bands
  • FM Broadcast Band Only
  • Details
  • Hi-Fi equipment
  • Power type and voltage
  • Alternating Current supply (AC) / 117 Volt
  • Loudspeaker
  • - For headphones or amp.
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: Natural Sound FM Stereo Tuner CT-7000 [USA & Canada model] - Yamaha Co.; Hamamatsu
  • Shape
  • Book-shelf unit.
  • Dimensions (WHD)
  • 436 x 144 x 352 mm / 17.2 x 5.7 x 13.9 inch
  • Notes

  • A hi-fi FM-Stereo Tuner with an analogue dial housed in an American Walnut wooden case with a hairline brushed aluminium front panel. Dual-gate MOS FET front end with a 7 gang tuning capacitor, PLL MPX decoder, ceramic block IF filter, low pass filter, auto hi-blend circuit, double FM muting circuit, two meters (signal strength/multipath, tuning), auto touch tuning, AFC station indicator, output level control. With a jack for headphones with volume control, on the back terminals for ground, F type socket for coaxial antenna, 75 ohm and 300 ohm antennae terminals, RCA phono sockets for Fixed and Variable Line Output, for Multipath output and IF output and an unswitched AC outlet.

    Specification  
    Tuning Range 88-108MHz
    Sensitivity (mono) IHF Normal > 2.5µV, Wide > 3.2µV
    Image Frequency Rejection > 120dB
    IF Rejection > 120dB
    Spurious Response Rejection > 120dB
    AM Rejection IHF > 60dB
    Capture Ratio 1mV: Normal > 1.3dB, Wide > 1.0dB
    10µV: Normal > 2.0dB, Wide > 3.0dB
    100mV: Normal > 1.0dB, Wide > 1.0dB
    Selectivity IHF (75kHz Dev) Normal > 80dB, Wide > 18dB
    Signal/Noise Ratio IHF (mono)
    (75kHz Dev)    		 > 78dB
    Signal/Noise Ratio IHF (stereo)
    (75kHz Dev)    		 > 75dB
    Total Harmonic Distortion IHF
    (antenna level 1mV)    		  
     Mono (400Hz; 75kHz Dev)
     (50-10,000Hz; 75kHz Dev)    		 Normal < 0.08%, Wide < 0.08%
    Normal < 0.3%, Wide < 0.15%
     Stereo (400Hz; 75kHz Dev)
     (50-10,000Hz; 75kHz Dev)    		 Normal < 0.08%, Wide < 0.08%
    Normal < 0.5%, Wide < 0.2%
    Stereo Separation IHF  
     (400Hz; 75kHz Dev)
     (50-10,000Hz; 75kHz Dev)    		 Normal & wide 50dB
    Normal 35dB, Wide 40dB
    Frequency Response 50-10,000Hz ±0.3dB
    30-15,000Hz +0.5dB,-1.0dB
    Headphone Output 4.16Ω
    Fixed Output 775mV
    Variable Output 2V-70mV variable
    Antenna Input Impedance 300Ω (balanced), 75Ω (unbalanced)

    Semiconductors: Transistors 108, FETs 12, Diodes 33, Zener Diodes 9, ICs 7
    Power requirements: 117V AC 60Hz
    Power Consumption: 23 watts (illum. off: 13 watts)

    Very similar to the Yamaha CT-7000 FM Stereo Tuner European version.

  • Net weight (2.2 lb = 1 kg)
  • 13 kg / 28 lb 10.1 oz (28.634 lb)
  • Mentioned in
  • -- Original prospect or advert (1978 Yamaha Natural Sound catalogue)
  • Literature/Schematics (1)
  • - - Manufacturers Literature (Service manual Yamaha CT-7000 dated 10-74)
  • Literature/Schematics (2)
  • -- Original prospect or advert ((Yamaha CT-7000 brochure)
  • Author
  • Model page created by Howard Craven. See "Data change" for further contributors.

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