• Year
  • 1929/1930
  • Category
  • Loudspeaker, headphone or earphone
  • Radiomuseum.org ID
  • 165710

 Technical Specifications

  • Wave bands
  • - without
  • Power type and voltage
  • Alternating Current supply (AC) / 110 Volt
  • Loudspeaker
  • Electro Magnetic Dynamic LS (moving-coil with field excitation coil)
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: Rola model 30-J - Rola Company, The; Oakland, CA
  • Shape
  • Table-Cathedral-Type (upright, round top or gothic arch, not rounded edges only).
  • Dimensions (WHD)
  • 15.25 x 13 x 8.5 inch / 387 x 330 x 216 mm
  • Notes
  • The Rola Electro-dynamic Cabinet Speaker operates with a light socket for power by using the model J loudspeaker with a Westinghouse Rectox Rectifier. It has a 20:1 input transformer (Lafayette models J-110, C-110-AC and J-90).
  • Price in first year of sale
  • 50.00 $
  • Author
  • Model page created by Ernst Erb. See "Data change" for further contributors.

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