B57

RGD (Brand), Radio Gramophone Development Co. Ltd.; Birmingham

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  • Year
  • 1960
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 102170

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

 Technical Specifications

  • Number of Transistors
  • 6
  • Main principle
  • Superheterodyne (common); ZF/IF 475 kHz; 2 AF stage(s)
  • Tuned circuits
  • 5 AM circuit(s)
  • Wave bands
  • Broadcast (MW) and Long Wave.
  • Power type and voltage
  • Dry Batteries / 2 x 6 Volt
  • Loudspeaker
  • Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 5 inch = 12.7 cm
  • Power out
  • 0.45 W (unknown quality)
  • Material
  • Leather / canvas / plastic - over other material
  • from Radiomuseum.org
  • Model: B57 - RGD Brand, Radio Gramophone
  • Shape
  • Portable set > 8 inch (also usable without mains)
  • Notes

  • Portable six transistor MW/LW radio in a leather case. Released in May 1960 at 16gns. Powered by two PP1 6 volt batteries connected in series. Socket for car aerial.

    A similar chassis is fitted to the RGD B56B which has a plastic case.

  • Price in first year of sale
  • 16.80 GBP
  • Mentioned in
  • -- Original-techn. papers.
  • Literature/Schematics (2)
  • ERT Service Chart 1271 dated February 18 1961
  • Author
  • Model page created by Peter Hoddow. See "Data change" for further contributors.

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