• Year
  • 1982–1995
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 180370

Click on the schematic thumbnail to request the schematic as a free document.

 Technical Specifications

  • Number of Transistors
  • Semiconductors present.
  • Semiconductors
  • Main principle
  • Superheterodyne (common)
  • Wave bands
  • FM Broadcast Band Only
  • Power type and voltage
  • Alternating Current supply (AC) / 100-127 / 200-240 Volt
  • Loudspeaker
  • - For headphones or amp.
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: Quad Tuner FM4 - Quad Brand; Acoustical
  • Shape
  • Book-shelf unit.
  • Dimensions (WHD)
  • 321 x 64 x 207 mm / 12.6 x 2.5 x 8.1 inch
  • Notes
  • A hi-fi FM stereo tuner with a digital frequency display housed in a green metal case. With a rotary tuning control, push buttons for 7 preset radio stations and Tune (save to memory), automatic AFC and muting, bar graph signal strength and centre tuning indicators and FM stereo indicator. On the back, a 75 ohm FM coaxial antenna connector, DIN Line output socket and an unswitched AC outlet. The preset buttons on the UK model are marked with UK radio stations, on export models marked 1 to 7.

    Specification  
    Frequency range 88-108MHz
    Sensitivity     
     30dB quieting
     
    Mono 1µV (1.2dBf)
     50dB quieting Mono 2.7µV (8dBf), Stereo 25µV (28dBf)
    Full Limiting < 1µV
    Signal/Noise  
     Input signal 1kHz
     at 1mV 'A' weighted
    Mono 76dB
    Stereo 70dB
    Distortion Input signal  
     1kHz±75kHz Mono 0.15%, Stereo 0.15%
     ±25kHz Mono 0.05%, Stereo 0.10%
    Selectivity 53dB
    Capture Ratio 2.5dB
    IF Rejection 100dB
    AM Suppression 60dB
    Image Rejection 80dB
    Pilot Tone Suppression 60dB
    Crosstalk at 1kHz 40dB
    Frequency Response 20Hz-15kHz +0dB,-1dB
    Output Level 30% Modulation 100mV
    Source Impedance 100Ω
    Recommended Load Impedance >20kΩ
    Aerial Input 75Ω unbalanced
    De-emphasis 50µs or 75µs

    Power requirements:  100-127V or 200-250V AC 50/60Hz with voltage selector switch
    Power consumption:   6VA

  • Net weight (2.2 lb = 1 kg)
  • 3 kg / 6 lb 9.7 oz (6.608 lb)
  • Source of data
  • - - Data from my own collection
  • Mentioned in
  • -- Original prospect or advert (1981 Quad Products Brochure)
  • Literature/Schematics (1)
  • - - Manufacturers Literature (Service manual Quad FM4 with updates 1982-1983)
  • Literature/Schematics (2)
  • - - Manufacturers Literature (Instruction book Quad FM4)
  • Author
  • Model page created by Stefan Schultze. See "Data change" for further contributors.

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