Gernsback Rotary Variable Condenser No. 3500

Electro Importing Co. (Eico); New York City, NY

Data
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Pictures
Collections

  • Year
  • 1914–1918
  • Category
  • Radio part (not a module) 
  • Radiomuseum.org ID
  • 147078

 Technical Specifications

  • Wave bands
  • - without
  • Power type and voltage
  • No Power needed
  • Loudspeaker
  • - - No sound reproduction output.
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: Gernsback Rotary Variable Condenser No. 3500 - Electro Importing Co. Eico;
  • Shape
  • Tablemodel, with any shape - general.
  • Dimensions (WHD)
  • 7 x 5 x 10 inch / 178 x 127 x 254 mm
  • Notes
  • Electro Importing Rotary Variable Condenser;
    Oak box with two screw terminals and round glass window on top, in/out rotary control on front.
    Capacitance is altered by rotating the dial, which in turn moves three rollers wrapped with foil; the center roller takes both layers, forming the capacitor. The unused foils are taken by two separate rollers at both sides.
    Patented July 23, 1912 - Capacity .01 M.F.
    Listed in the 1914 No. 14 Electro Importing catalog thru the the 1918 No. 20 Electro Importing catalog. This variable condenser was no longer offered in the 1920 No. 21 Electro catalog.
  • Net weight (2.2 lb = 1 kg)
  • 7 lb (7 lb 0 oz) / 3.178 kg
  • Price in first year of sale
  • 4.00 $
  • Literature/Schematics (4)
  • 1914-1918 Electro Importing C. catalogs
  • Author
  • Model page created by a member from A. See "Data change" for further contributors.

 Collections | Museums | Literature

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The model Gernsback Rotary Variable Condenser is part of the collections of the following members.

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