Two-Stage A. F. Amplifier MP-400 (MP400)

DeForest Radio Telephone & Telegraph Co. (De Forest); New York

  • Year
  • 1922
  • Category
  • Audio Amplifier or -mixer
  • Radiomuseum.org ID
  • 37099
    • alternative name: Lee De Forest Mfg.

 Technical Specifications

  • Number of Tubes
  • 2
  • Main principle
  • Audio-Amplification; 2 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: Two-Stage A. F. Amplifier MP-400 - DeForest Radio Telephone &
  • Shape
  • Tablemodel, Box - most often with Lid (NOT slant panel).
  • Notes
  • The De Forest Radio Telephone & Telegraph Co. Combination Set MP-400 consisted of 2-MP-200 Single Stage Audio Amplifiers.
  • External source of data
  • Ernst Erb
  • Literature/Schematics (4)
  • Deforest Radio Equipment Catalog H page 13

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