• Year
  • 1923
  • Category
  • Detector-Radio (Crystal or diode, without tubes/transistors)
  • Radiomuseum.org ID
  • 204583

 Technical Specifications

  • Number of Tubes
  • 1
  • Valves / Tubes
  • Main principle
  • Crystal or Solid State Detector with Amplifer
  • Wave bands
  • Broadcast (MW) and Long Wave.
  • Power type and voltage
  • Storage and/or dry batteries
  • Loudspeaker
  • - For headphones or amp.
  • Material
  • Wooden case, TUBES VISIBLE.
  • from Radiomuseum.org
  • Model: Crystal & Valve Set - Ionophone Brand, J. A. Coomes
  • Shape
  • Tablemodel, Box - most often with Lid (NOT slant panel).
  • Notes
  • J.A. Coomes & Company Ltd. Crystal & Valve Set
  • Price in first year of sale
  • 8.00 pd
  • Literature/Schematics (1)
  • April 14, 1923 The Wireless World & Radio Review page ix
  • Author
  • Model page created by Alan Larsen. See "Data change" for further contributors.

 Collections | Museums | Literature

 Forum