Thoroughbred Vario-Coupler

Marshall-Gerken Co., The; Toledo, Ohio

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  • Year
  • 1922
  • Category
  • Miscellaneous (Other, Various) - see notes
  • Radiomuseum.org ID
  • 137576
    • alternative name: Thoro-bred Radio Products || Thoroughbred Apparatus

 Technical Specifications

  • Main principle
  • RF-Circuit or wave trap (separate, can also be an antenna with amp.)
  • Wave bands
  • Wave Bands given in the notes.
  • Power type and voltage
  • No Power needed
  • Loudspeaker
  • - - No sound reproduction output.
  • Material
  • Various materials
  • from Radiomuseum.org
  • Model: Thoroughbred Vario-Coupler - Marshall-Gerken Co., The;
  • Notes
  • All moulded type. With removable base for panel mounting. "The first seven taps on the primary are tapped one turn at a time and the last seven, a tap at each seven turns. The user is thus able to tune in one turn at a time-". Wave length about 200 to 700 meters. Later the Company chose the trade name "Thoro-bred" for their radio products. This vario coupler came also with the new name.
  • Price in first year of sale
  • 5.00 $
  • Source of data
  • - - Manufacturers Literature
  • Mentioned in
  • Radio News Oct.1922, p.701
  • Author
  • Model page created by Otto Frosinn. See "Data change" for further contributors.

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