• Year
  • 1939 ?
  • Category
  • Loudspeaker, headphone or earphone
  • Radiomuseum.org ID
  • 224216
    • alternative name: Brush Electronics

 Technical Specifications

  • Wave bands
  • - without
  • Power type and voltage
  • No Power needed
  • Loudspeaker
  • - Is a Headphone or Earphone
  • Material
  • Bakelite case
  • from Radiomuseum.org
  • Model: Crystal Headphones A - Brush Development Co. /
  • Notes
  • Type "A". Response: 60 Hz to10000 Hz. Impedance over 50 kOhm at 400 Hz. At no time D.C. voltage should be applied!  Single phone with band and cord or with  lorgnette handle available.

  • Net weight (2.2 lb = 1 kg)
  • 0 lb 6 oz (0.375 lb) / 0.170 kg
  • Price in first year of sale
  • 5.00 USD
  • Author
  • Model page created by a member from D. See "Data change" for further contributors.

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Collections

The model Crystal Headphones is part of the collections of the following members.

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