• Year
  • 1925 ?
  • Category
  • Loudspeaker, headphone or earphone
  • Radiomuseum.org ID
  • 138054

 Technical Specifications

  • Wave bands
  • - without
  • Power type and voltage
  • No Power needed
  • Loudspeaker
  • Horn / Ø 7 cm = 2.8 inch
  • Material
  • Bakelite case
  • from Radiomuseum.org
  • Model: Operatone - Piroxloid Products Corp.; New
  • Shape
  • Miscellaneous shapes - described under notes.
  • Dimensions (WHD)
  • 70 x 135 x 70 mm / 2.8 x 5.3 x 2.8 inch
  • Notes
  • Midget speaker, attributed "small and mighty". Unusual shape: upright folded horn with bell like top and below that a sound reflector ring.
  • Net weight (2.2 lb = 1 kg)
  • 0.2 kg / 0 lb 7 oz (0.441 lb)
  • Author
  • Model page created by Helmut Schrammel. See "Data change" for further contributors.

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

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