Project 60 Stereo FM Tuner

Sinclair Radionics Ltd.; St. Ives (Cambridge)

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  • Year
  • 1970
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 336895

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

 Technical Specifications

  • Number of Transistors
  • 16
  • Main principle
  • Superhet with RF-stage; ZF/IF 10700 kHz
  • Wave bands
  • FM Broadcast Band Only
  • Power type and voltage
  • Powered by external power supply or a main unit.
  • Loudspeaker
  • - For headphones or amp.
  • Material
  • Printed Circuit Board
  • from Radiomuseum.org
  • Model: Project 60 Stereo FM Tuner - Sinclair Radionics Ltd.; St.
  • Shape
  • Chassis only or for «building in»
  • Dimensions (WHD)
  • 91.5 x 40 x 207 mm / 3.6 x 1.6 x 8.1 inch
  • Notes

  • The Stereo FM Tuner Unit is part of the Sinclair Project 60 range launched in 1970.

    According to company advertisements, it was the first commercial radio in the world to use the “phase lock loop” principle.
    hey stated before the production of this tuner, the phase lock loop principle was used for receiving signals from space craft because of its vastly improved signal to noise ratio over other systems. Now, for the first time, the principle has been applied to an FM tuner with fantastically good results. Other original features include varicap diode tuning, printed circuit coils, an I.C. in the specially designed stereo decoder, and a squelch circuit for silent tuning between stations. Sensitivity is such that good reception becomes possible in difficult areas. Foreign stations can be tuned in suitable conditions and often a few inches of wire are enough for an aerial. In terms of high fidelity, this tuner has a lower level of distortion than any other tuner we know. Stereo broadcasts are received automatically as the tuning control is rotated, a panel indicator lighting up as the stereo signal is tuned in. This tuner can also be used to advantage with any other high-fidelity system.

    SPECIFICATIONS: 

    Number of transistors: 16 plus an IC (SN76110)
    Tuning range: 87.5 to 108 MHz
    Capture ratio: 1.5 dB
    Sensitivity: 2 µV for 30 dB quieting: 7 µV  for full limiting
    Squelch level: 20 µV
    AFC range: ±200 kHz
    Signal to noise ratio: >65 dB
    Audio frequency response: 10 Hz to 15 kHz (±1dB)
    Total harmonic distortion: 0.15  for 40 % modulation
    Stereo decoder operating level: 2 µV
    Pilot tone suppression: 30 dB
    Crosstalk: 40 dB
    Output voltage: 2 by150 mV RMS
    Aerial Impedance: 75 Ω
    Indicators: Mains on: Stereo on: tuning indicator
    Operating voltage: 25-30 VDC

     

  • Price in first year of sale
  • 25.00 GB £
  • Mentioned in
  • -- Original prospect or advert (Practical Wireless April 1971 Page 93.)
  • Literature/Schematics (1)
  • - - Manufacturers Literature (Sinclair Project 60 Stereo FM Tuner Instructions)
  • Author
  • Model page created by Gary Cowans. See "Data change" for further contributors.

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