• Year
  • 1937/1938
  • Category
  • Audio Amplifier or -mixer
  • Radiomuseum.org ID
  • 200944

 Technical Specifications

  • Number of Tubes
  • 7
  • Valves / Tubes
  • Main principle
  • Audio-Amplification
  • Wave bands
  • - without
  • Power type and voltage
  • Alternating Current supply (AC)
  • Loudspeaker
  • Permanent or electro-dynamic (moving coil), system not known yet.
  • Power out
  • 12 W (unknown quality)
  • from Radiomuseum.org
  • Model: 412 - Bell Sound Systems; Columbus
  • Dimensions (WHD)
  • 16 x 19 x 13.5 inch / 406 x 483 x 343 mm
  • Notes
  • P.A. Verstärker mit Kristallmikrofon.
  • Net weight (2.2 lb = 1 kg)
  • 50 lb (50 lb 0 oz) / 22.7 kg
  • Author
  • Model page created by Heiko zur Mühlen. See "Data change" for further contributors.

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