• Year
  • 1927
  • Category
  • Audio Amplifier or -mixer
  • Radiomuseum.org ID
  • 34797

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

 Technical Specifications

  • Number of Tubes
  • 3
  • Number of Transistors
  • Semiconductors
  • 886A
  • Main principle
  • Audio-Amplification
  • Wave bands
  • - without
  • Power type and voltage
  • Alternating Current supply (AC) / 105-125 Volt
  • Loudspeaker
  • - This model requires external speaker(s).
  • from Radiomuseum.org
  • Model: RPA-4A - Brunswick-Balke-Collender Co.
  • Shape
  • Chassis only or for «building in»
  • Notes
  • Ballst tube 886A.

     

  • External source of data
  • Ernst Erb
  • Circuit diagram reference
  • Rider's Perpetual, Volume 1 = 1931/1934 (for 1919-1931)

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