• Year
  • 1917–1925
  • Category
  • Loudspeaker, headphone or earphone
  • Radiomuseum.org ID
  • 229256

 Technical Specifications

  • Wave bands
  • - without
  • Power type and voltage
  • Storage and/or dry batteries / 6 Volt
  • Loudspeaker
  • Horn / Ø 3.5 inch = 8.9 cm
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: Motor Dictograph - Dictograph Products Co.
  • Shape
  • Miscellaneous shapes - described under notes.
  • Dimensions (WHD)
  • 0 x 10 x 0 inch / 0 x 254 x 0 mm
  • Notes
  • The "Motor Dictograph" is a system for closed-cabin driver/passenger communication and was first displayed in the 1917 Salon and Shows.

    It comprises a carbon microphone built into the passenger cabin, and a horn speaker which is mounted near the driver seat.

    The horn has a height of 10"; the typeplate on its base reads 6 Volt - 2 Amp.

     

    It was still in use in 1925, when a Minerva AF was equipped with the system.

  • Mentioned in
  • Automotive Industries, Volume 53, 1919, P.396
  • Literature/Schematics (1)
  • Radio Horn Speaker Encyclopedia, Paul, 1986
  • Author
  • Model page created by Mark Hippenstiel. See "Data change" for further contributors.

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