• Year
  • 1922/1923
  • Category
  • Radio part (not a module) 
  • Radiomuseum.org ID
  • 214652
    • alternative name: Lee De Forest Mfg.

 Technical Specifications

  • Wave bands
  • - without
  • Power type and voltage
  • No Power needed
  • Loudspeaker
  • - - No sound reproduction output.
  • Material
  • Various materials
  • from Radiomuseum.org
  • Model: F-500 Rheostat - DeForest Radio Telephone &
  • Notes
  • This F-500 "De Forest Rheostat" was offered for $ 1.20 in 1923 (postal stamp) by "The North American Radio & Supply Corp.", 5-7 Columbus Circle, New York City.
  • Price in first year of sale
  • 1.20 $
  • Author
  • Model page created by Ernst Erb. See "Data change" for further contributors.

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