• Year
  • 1929 ?
  • Category
  • Power supply/conditioner or battery or charger 
  • Radiomuseum.org ID
  • 57891

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

 Technical Specifications

  • Number of Tubes
  • 1
  • Valves / Tubes
  • 80
  • Wave bands
  • - without
  • Power type and voltage
  • Alternating Current supply (AC) / 110; 130 Volt
  • Loudspeaker
  • - - No sound reproduction output.
  • from Radiomuseum.org
  • Model: 33 A - Silver - Marshall; Chicago, IL
  • Notes
  • Different transformers for 25-40 cycles or 50-60 cycles.
    The power supply unit "33 A" is used by the receiver units "34 A" and "35 A".
  • External source of data
  • Ernst Erb
  • Circuit diagram reference
  • Rider's Perpetual, Volume 1 = 1931/1934 (for 1919-1931)

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