• Year
  • 1958
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 243991

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

 Technical Specifications

  • Number of Tubes
  • 4
  • Number of Transistors
  • Main principle
  • Superheterodyne (common); ZF/IF 470 kHz; 2 AF stage(s)
  • Tuned circuits
  • 6 AM circuit(s)
  • Wave bands
  • Broadcast (MW) and Long Wave.
  • Power type and voltage
  • Line / Batteries (any type) / 110-120; 190-250 / 1.4 & 90 Volt Volt
  • Loudspeaker
  • Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 5 inch = 12.7 cm
  • Material
  • Catalin (a brand name for a thermosetting polymer popular in the 1930s and 1940s - a phenol formaldehyde resin - like Bakelite, but a two-stage process with a lot of work afterwards).
  • from Radiomuseum.org
  • Model: B55 [MkII] - RGD Brand, Radio Gramophone
  • Shape
  • Portable set > 8 inch (also usable without mains)
  • Dimensions (WHD)
  • 290 x 190 x 90 mm / 11.4 x 7.5 x 3.5 inch
  • Notes
  • See also the original  RGD B55 which is rexine style on plywood.

    Battery types: B126 - 90 V & AD35 - 1.4 V. The radio includes a "battery economy switch".

  • Author
  • Model page created by Michael Watterson. See "Data change" for further contributors.

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