• Year
  • 1938
  • Category
  • Commercial Transmitter & Receiver (TRX not Amateur)
  • Radiomuseum.org ID
  • 47386

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

 Technical Specifications

  • Number of Tubes
  • 5
  • Main principle
  • TRF without regeneration; 1 AF stage(s)
  • Tuned circuits
  • 4 AM circuit(s)
  • Wave bands
  • Wave Bands given in the notes.
  • Power type and voltage
  • Alternating Current supply (AC) / 110 Volt
  • Loudspeaker
  • - For headphones or amp.
  • from Radiomuseum.org
  • Model: 404 - Mission Bell Radio Mfg. Co.;
  • Notes
  • Repeater to enhance signal level (e.g. from a wireless record player) coming through power line and reradiated on different frequency. Thus permitting to be picked up by any radio in the vicinity.
    Three circuit TRF applying detected and amplified audio to modulate a built-in oscillator/transmitter.
  • External source of data
  • Ernst Erb
  • Circuit diagram reference
  • Rider's Perpetual, Volume 11 = ca. 1940 and before

 Collections | Museums | Literature

 Forum