• Year
  • 1947 ??
  • Category
  • Medical Technology
  • Radiomuseum.org ID
  • 171292
    • alternative name: Chicago Radio Lab

 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 / 1.5V & 30 Volt
  • Loudspeaker
  • - only for Earphone!
  • Material
  • Plastics (no bakelite or catalin)
  • from Radiomuseum.org
  • Model: 75 Hearing Aid - Zenith Radio Corp.; Chicago,
  • Shape
  • Very small Portable or Pocket-Set (Handheld) < 8 inch.
  • Dimensions (WHD)
  • 66 x 136 x 24 mm / 2.6 x 5.4 x 0.9 inch
  • Net weight (2.2 lb = 1 kg)
  • 0.150 kg / 0 lb 5.3 oz (0.33 lb)

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Collections

The model 75 is part of the collections of the following members.

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