• Year
  • 1923/1924
  • Category
  • Detector-Radio (Crystal or diode, without tubes/transistors)
  • Radiomuseum.org ID
  • 76757

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

 Technical Specifications

  • Main principle
  • Crystal or Solid State Detector
  • Tuned circuits
  • 1 AM circuit(s)
  • Wave bands
  • Broadcast (MW) and Long Wave.
  • Power type and voltage
  • No Power needed
  • Loudspeaker
  • - For headphones or amp.
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: Syren - Tofield, H.C., Ltd., Tolfield;
  • Shape
  • Tablemodel, Box - most often with Lid (NOT slant panel).
  • Dimensions (WHD)
  • 9 x 5 x 6 inch / 229 x 127 x 152 mm
  • Notes
  • loading coil for LW; BBC/PMG stamp, GPO No.460;

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Museums

The model Syren can be seen in the following museums.

 Forum