• Year
  • 1941 ??
  • Category
  • Loudspeaker, headphone or earphone
  • Radiomuseum.org ID
  • 244021
    • alternative name: Brush Electronics

 Technical Specifications

  • Wave bands
  • - without
  • Power type and voltage
  • No Power needed
  • Loudspeaker
  • - Is a Headphone or Earphone
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: Crystal Headphones B - Brush Development Co. /
  • Notes
  • Light wight crystal headphones. Impedance over 25 kohms at 400 Hz.. Response from 60Hz to 10 kHz.  Aluminum case. D.C. voltage should be applied at no time!

  • Net weight (2.2 lb = 1 kg)
  • 0 lb 3.5 oz (0.219 lb) / 0.099 kg
  • Author
  • Model page created by Otto Frosinn. See "Data change" for further contributors.

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