F-4

Rola Company (AUS) Pty. Ltd.; Melbourne

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  • Year
  • 1939 ??
  • Category
  • Loudspeaker, headphone or earphone
  • Radiomuseum.org ID
  • 315853

 Technical Specifications

  • Wave bands
  • - without
  • Loudspeaker
  • Electro Magnetic Dynamic LS (moving-coil with field excitation coil) / Ø 5 inch = 12.7 cm
  • Material
  • Various materials
  • from Radiomuseum.org
  • Model: F-4 - Rola Company AUS Pty. Ltd.;
  • Notes

  • 5" Electro-dynamic loudspeaker.

    Type No. F-4
    Overall Diameter 5"
    Voicecoil Diameter ¾"
    Voicecoil Impedance 3Ω
    Normal Field Excitation 6 watts
    Maximum Weight of Field Coil ¾ lbs

    Superseded by PM Type 5C with Type 7/70 filter choke.

  • Mentioned in
  • - - Manufacturers Literature (Various Rola Loudspeaker Data guides.)
  • Author
  • Model page created by Martin Kent. See "Data change" for further contributors.

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