• Year
  • 1931
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 34731

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

 Technical Specifications

  • Number of Tubes
  • 11
  • Main principle
  • Superhet with RF-stage; ZF/IF 175 kHz
  • Tuned circuits
  • 7 AM circuit(s)
  • Wave bands
  • Broadcast and Short Wave (SW).
  • Power type and voltage
  • Alternating Current supply (AC) / 105-115; 115-125 Volt
  • Loudspeaker
  • Electro Magnetic Dynamic LS (moving-coil with field excitation coil)
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: 25 - Brunswick-Balke-Collender Co.
  • Shape
  • Console, Highboy (legs > 50 %).
  • Notes
  • Riders schematic only displays 9 tubes, but there is the Shortwave Converter(100) which employs two 24. The tube complement stated in Radio Collectors Guide 1921-1932 is not correct (quoting 5 x type 54)!
  • Price in first year of sale
  • 225.00 $
  • External source of data
  • Ernst Erb
  • Circuit diagram reference
  • Rider's Perpetual, Volume 3 = 1933 and before

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