• Year
  • 1929
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 33981
    • alternative name: Balkeit || First National
    • Brand: Overtone

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

 Technical Specifications

  • Number of Tubes
  • 9
  • Main principle
  • TRF without regeneration; Neutrodyne
  • Tuned circuits
  • 5 AM circuit(s)
  • Wave bands
  • Broadcast only (MW).
  • Power type and voltage
  • Alternating Current supply (AC) / 115 Volt
  • Loudspeaker
  • Electro Magnetic Dynamic LS (moving-coil with field excitation coil)
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: Balkeit Symphion C - Fansteel Products Pfanstiehl,
  • Shape
  • Console with any shape - in general
  • Notes
  • Balkeit, Balkite, Pfanstiehl are put together to Fansteel. One dial (primary tuning control knob).
    The Symphion models employ a UX210 tube as an oscillator at about 3000 kHz, to supply the filaments of the five 201As ! Thus avoiding hum and permitting use of the 201A (which is considered superior) in an electric set.
  • Price in first year of sale
  • 175.00 $
  • External source of data
  • Ernst Erb
  • Circuit diagram reference
  • Rider's Perpetual, Volume 1 = 1931/1934 (for 1919-1931)
  • Literature/Schematics (2)
  • Radio Broadcast, Apr 1930, p. 348

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