Moving Coil Loudspeakers

Baker Loudspeaker (brand); various manufacturers.

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  • Year
  • 1928
  • Category
  • Loudspeaker, headphone or earphone
  • Radiomuseum.org ID
  • 331432
    • Brand: Fydelitone

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

 Technical Specifications

  • Wave bands
  • - without
  • Power type and voltage
  • Powered by external power supply or a main unit.
  • Loudspeaker
  • Electro Magnetic Dynamic LS (moving-coil with field excitation coil)
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: Moving Coil Loudspeakers - Baker Loudspeaker brand;
  • Shape
  • Chassis only or for «building in»
  • Notes

  • The Baker's Selhurst Moving-Coil Speaker was sold in parts, in different configurations.

    Dimensions
    Outside diameter: 5"
    Inside diameter: 4.375" for 6 volt, 4" for high-voltage windings
    Length inside: 4.75"
    Length outside: 5.25"
    Core diameter: various
    Gap width: 5-64" or made to order
    Gap length: 0.375"
    Diaphragm diameter: various
    Diaphragm angle: 90°

    Moving Coil
    Various patterns supplied.
    Centring by a two-thread adjustable suspension.
    Flanged celluloid ring on coil for cone attachment.

    Diaphragm
    Mounted on leather, silk or rubber as required.
    Diameters: 7" to 9" as ordered
    Supported by aluminium frame with securing ring.

  • Mentioned in
  • La Radio per Tutti, Italy, January 1928
  • Literature/Schematics (2)
  • Modern Wireless, August 1928
  • Author
  • Model page created by Pier Antonio Aluffi. See "Data change" for further contributors.

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