• Year
  • 1928
  • Category
  • Loudspeaker, headphone or earphone
  • Radiomuseum.org ID
  • 331816

Click on the schematic thumbnail to request the schematic as a free document.

 Technical Specifications

  • Wave bands
  • - without
  • Power type and voltage
  • Other, details in remarks or not known.
  • Loudspeaker
  • Electro Magnetic Dynamic LS (moving-coil with field excitation coil)
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: Marconiphone Moving Coil Unit B.1289, B.1290, B.1291 - Marconi Co. Marconiphone,
  • Shape
  • Chassis only or for «building in»
  • Notes
  • Moving coil speaker unit available in 3 versions:

    • No. B.1289 for operations from AC mains
    • No. B.1290 for operations from DC mains
    • No. B.1291 for operations 6-10 V accumulator
  • Price in first year of sale
  • 6.30 £
  • Mentioned in
  • La Radio per tutti, numero 11, giugno 1929
  • Literature/Schematics (1)
  • -- Original prospect or advert (Popular Wireless, September 15th, 1928)
  • Author
  • Model page created by Pier Antonio Aluffi. See "Data change" for further contributors.

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