• Year
  • 1909
  • Category
  • Radio module pre 1926 (not a part, not a key)
  • Radiomuseum.org ID
  • 205262
    • alternative name: Lee De Forest Mfg.

 Technical Specifications

  • Power type and voltage
  • No Power needed
  • Loudspeaker
  • - - No sound reproduction output.
  • Material
  • Various materials
  • from Radiomuseum.org
  • Model: R-J Variometer - DeForest Radio Telephone &
  • Shape
  • Chassis only or for «building in»
  • Notes
  • A variable tuning coil without sliding contacts, or a loose coupling using rotating coils.
  • Price in first year of sale
  • 16.00 $
  • Mentioned in
  • - - Manufacturers Literature (Ad in MODERN ELECTRICS (April 1909) p. 38)
  • Author
  • Model page created by Michael Murray. See "Data change" for further contributors.

 Collections | Museums | Literature

Collections

The model R-J Variometer is part of the collections of the following members.

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