• Country
• United States of America (USA)

• Manufacturer / Brand
• DeForest Radio Telephone & Telegraph Co. (De Forest); New York

• Year
• 1920

• Category
• Radio part (not a module) 

• Radiomuseum.org ID
• 147271

• • alternative name: Lee De Forest Mfg.

• Wave bands
• - without

• Power type and voltage
• No Power needed

• Loudspeaker
• - - No sound reproduction output.

• Material
• Various materials

• from Radiomuseum.org
• Model: Variable Condenser, Frost CV-1533 [For oil with vernier in glass case] - DeForest Radio Telephone &

• Shape
• Tablemodel, with any shape - general.

• Notes
• De Forest CV-1533 Condenser; Max. capacity 0.0015 MF. Mounted in a non-shielded glass jar with hole and plug for use with oil where larger capacities are desired or where it is desired to use a condenser on fairly large potentials. Sold with vernier. The finish of the metallic parts is polished nickel. The order code word for this device was "Frost"

• Price in first year of sale
• 22.00 $

• Mentioned in
• -- Original prospect or advert (De Forest Radio Receiving Apparatus Catalog "D")

• Author
• Model page created by a member from A. See "Data change" for further contributors.

• Other Models

• Here you find 158 models, 132 with images and 16 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from DeForest Radio Telephone & Telegraph Co. (De Forest); New York