• Year
  • 1942–1945 ??
  • Category
  • Medical Technology
  • Radiomuseum.org ID
  • 354054

 Technical Specifications

  • Number of Tubes
  • 3
  • Main principle
  • Audio-Amplification; 3 AF stage(s)
  • Wave bands
  • - without
  • Details
  • Hearing aid
  • Power type and voltage
  • Dry Batteries / 1.5 & 45 Volt
  • Loudspeaker
  • - only for Earphone!
  • Material
  • Plastics (no bakelite or catalin)
  • from Radiomuseum.org
  • Model: Acousticon "Symphonic" Hearing Aid A-55 - Dictograph Products Co.
  • Shape
  • Very small Portable or Pocket-Set (Handheld) < 8 inch.
  • Dimensions (WHD)
  • 57 x 97 x 19 mm / 2.2 x 3.8 x 0.7 inch
  • Notes
  • The Acousticon "Symphonic" A-55 was a two-piece hearing aid and needed external batteries.

  • Net weight (2.2 lb = 1 kg)
  • 0.110 kg / 0 lb 3.9 oz (0.242 lb)
  • Author
  • Model page created by Wolfgang Gebert. See "Data change" for further contributors.

 Collections | Museums | Literature

Collections

The model Acousticon "Symphonic" Hearing Aid is part of the collections of the following members.

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