Three-Stage Audio Amplifier

Firth, John & Co. (Firco); New York, (NY)

  • Year
  • 1921 ?
  • Category
  • Audio Amplifier or -mixer
  • Radiomuseum.org ID
  • 306372

 Technical Specifications

  • Number of Tubes
  • 3
  • Valves / Tubes
  • Main principle
  • Audio-Amplification; 3 AF stage(s)
  • Wave bands
  • - without
  • Power type and voltage
  • Storage and/or dry batteries
  • Loudspeaker
  • - This model requires external speaker(s).
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: Three-Stage Audio Amplifier - Firth, John & Co. Firco; New
  • Shape
  • Tablemodel, Box - most often with Lid (NOT slant panel).
  • Author
  • Model page created by Alan Larsen. See "Data change" for further contributors.

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