Transceiver TR 56 Type TRW TRM

National Company; Cambridge & Malden (MA)

  • Year
  • 1934/1935
  • Category
  • Amateur TRX: Transmitter/Receiver (and Transceiver)
  • Radiomuseum.org ID
  • 286208
    • alternative name: National Toy Co.
    • Brand: Thrillbox

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

 Technical Specifications

  • Number of Tubes
  • 2
  • Valves / Tubes
  • 30 33
  • Main principle
  • Transceiver
  • Wave bands
  • VHF incl. FM and/or UHF (see notes for details)
  • Power type and voltage
  • Storage and/or dry batteries
  • Loudspeaker
  • - For headphones or amp.
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: Transceiver TR 56 Type TRW [TRM] - National Company; Cambridge &
  • Shape
  • Portable set > 8 inch (also usable without mains)
  • Notes
  • The National TR 56 (TRW) Transceiver is a portable unit, operating on the 56 MHz band. The receiver portion is superregenerative. It is housed in an oak cabinet.

    The TRM version comes housed in a metal cabinet ($45 US).

  • Price in first year of sale
  • 67.50 USD
  • Mentioned in
  • National Catalog No. 240 - 1934
  • Author
  • Model page created by Wayne Childress. See "Data change" for further contributors.

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