• Year
  • 1929
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 38006

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

 Technical Specifications

  • Number of Tubes
  • 8
  • Main principle
  • TRF without regeneration; Neutrodyne
  • Tuned circuits
  • 4 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)
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: R-4 Ch= 7R + 8P - Edison, Thomas A., North
  • Shape
  • Console, Highboy (legs > 50 %).
  • Notes
  • One dial (primary tuning control knob) ; push-pull af output stage; Model "R4" is a combination of the receiver unit "7R" and the power unit "8P"; model "R4" also incorporates the "Light-O-Matic" dial drive mechanism.
    4 legged console with stretcher base.
  • Price in first year of sale
  • 215.00 $
  • External source of data
  • Ernst Erb
  • Circuit diagram reference
  • Rider's Perpetual, Volume 1 = 1931/1934 (for 1919-1931)

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