Detector and Three-Stage Amplifier

Proudfoot, G.M.; Chicago, IL

  • Year
  • 1921
  • Category
  • Radio module pre 1926 (not a part, not a key)
  • Radiomuseum.org ID
  • 196057

 Technical Specifications

  • Number of Tubes
  • 4
  • Main principle
  • Detector with Vacuum Tube (Valve), no tuner; 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: Detector and Three-Stage Amplifier - Proudfoot, G.M.; Chicago, IL
  • Shape
  • Tablemodel, Box - most often with Lid (NOT slant panel).
  • Notes
  • The G. M. Proudfoot Detector and Three-Stage Audio Amplifier was advertised in the November 1921 Radio News magazine.
  • Price in first year of sale
  • 65.00 $
  • Literature/Schematics (1)
  • November 1921 Radio News advertisement page 451
  • Author
  • Model page created by Alan Larsen. See "Data change" for further contributors.

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