• Year
  • 1929 ?
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 125285
    • alternative name: Apex Electric Mfg. || Case Electric || Melrose || United States Radio & T

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

 Technical Specifications

  • Number of Tubes
  • 5
  • Valves / Tubes
  • Main principle
  • TRF (Tuned-Radio-Frequency but use of regeneration unknown); Screengrid 1926-1935
  • Tuned circuits
  • 3 AM circuit(s)
  • Wave bands
  • Broadcast only (MW).
  • Power type and voltage
  • Alternating Current supply (AC) / 110 Volt
  • Loudspeaker
  • Electro Magnetic Dynamic LS (moving-coil with field excitation coil)
  • from Radiomuseum.org
  • Model: Radiotrope 27R [Late Model] - Apex Electric, Pool; Chicago;
  • Notes
  • One dial (primary tuning control knob).
  • Circuit diagram reference
  • Rider's Perpetual, Volume 1 = 1931/1934 (for 1919-1931)

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