• Year
  • 1973 ?
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 203991

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

 Technical Specifications

  • Number of Transistors
  • 11
  • Main principle
  • Superheterodyne (common); ZF/IF 470 / 10700 kHz; 4 AF stage(s); none
  • Tuned circuits
  • 5 AM circuit(s)     6 FM circuit(s)
  • Wave bands
  • Broadcast, Long Wave and FM or UHF.
  • Power type and voltage
  • Batteries / addl. power jack / 9 Volt
  • Loudspeaker
  • Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 10 cm = 3.9 inch
  • Power out
  • 0.5 W (unknown quality)
  • Material
  • Plastics (no bakelite or catalin)
  • from Radiomuseum.org
  • Model: RAD23 - Fidelity Radio Co. Ltd.;
  • Shape
  • Portable set > 8 inch (also usable without mains)
  • Dimensions (WHD)
  • 300 x 200 x 80 mm / 11.8 x 7.9 x 3.1 inch
  • Notes
  • Rear: Earphone/tape out, DC 9V in and Socket for car aerial. Though Silicon transistor -Ve ground, the outer of the external 9V DC jack socket is +Ve 9V PP9 battery last seen in local shops 2010. Still available online 2011. Rear cover held on by side carry handle screws. All "lockfit" Silicon except Audio Out is Germanium AC129 driver and AC127 + AC128 complementary output

    The unlisted transistor is used as a bias diode (D4), for the AC127 & AC128 output stage.

    • LW 1200 - 2000m
    • MW 186 - 550m
    • FM/VHF/UKW 87.5 - 108 MHz

    PP9 battery pack.

    Sockets for car aerial, earphone/external speaker and 9V DC in (outer positive)

  • Net weight (2.2 lb = 1 kg)
  • 1.880 kg / 4 lb 2.3 oz (4.141 lb)
  • Circuit diagram reference
  • Radio and TV Servicing books (R&TVS) book
  • Mentioned in
  • R&TVS 1974, page 484
  • Author
  • Model page created by Michael Watterson. See "Data change" for further contributors.

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