• Year
  • 1923 ?
  • Category
  • Loudspeaker, headphone or earphone
  • Radiomuseum.org ID
  • 326251

 Technical Specifications

  • Wave bands
  • - without
  • Power type and voltage
  • No Power needed
  • Material
  • Various materials
  • from Radiomuseum.org
  • Model: Headphones MK. 3 - Sterling Telephone & Electric
  • Shape
  • Portable set > 8 inch (also usable without mains)
  • Notes
  • Headphones with impedance of 4000 Ω.

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