• Year
  • 1928
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 36322

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

 Technical Specifications

  • Number of Tubes
  • 4
  • Valves / Tubes
  • Main principle
  • TRF without regeneration; Neutrodyne
  • Tuned circuits
  • 2 AM circuit(s)
  • Wave bands
  • Broadcast only (MW).
  • Power type and voltage
  • Storage and/or dry batteries / ? & 90 & 135 & -4.5 & -22.5 Volt
  • Loudspeaker
  • - This model requires external speaker(s).
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: 401 - Crosley Radio Corp.;
  • Shape
  • Tablemodel, with any shape - general.
  • Notes
  • The Crosley model 401 is a battery operated four tube TRF receiver.
    First stage (RF amplification) uses a neutralization (neutrodyne) circuit. Grid leak detector followed  by a two-stage transformer coupled AF amplifier.

  • External source of data
  • Ernst Erb
  • Circuit diagram reference
  • Rider's Perpetual, Volume 1 = 1931/1934 (for 1919-1931)

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