• Year
  • 1941/1942
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 49258

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

 Technical Specifications

  • Number of Tubes
  • 8
  • Main principle
  • Superhet with RF-stage; ZF/IF 455 kHz
  • Tuned circuits
  • 7 AM circuit(s)
  • Wave bands
  • Broadcast, Short Wave(s) and Police.
  • Power type and voltage
  • Alternating Current supply (AC) / 117 Volt
  • Loudspeaker
  • Electro Magnetic Dynamic LS (moving-coil with field excitation coil) / Ø 10 inch = 25.4 cm
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: 81K31 - Motorola Inc. ex Galvin Mfg.Co
  • Shape
  • Console with Push Buttons.
  • Dimensions (WHD)
  • 28.25 x 41 x 13 inch / 718 x 1041 x 330 mm
  • Notes
  • Permeability Tuner. Built in loop antenna. Broadcast Band: 540-1720 kc; Police Band: 1.7-5.7 mc; Short Wave Band: 5.7-12.2 mc. Six electric push buttons.

  • External source of data
  • Ernst Erb
  • Circuit diagram reference
  • Rider's Perpetual, Volume 13 = 1942 and before
  • Literature/Schematics (1)
  • - - Manufacturers Literature
  • Literature/Schematics (3)
  • Motorola Booklet H-329, for 1942.

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