• Country
• United States of America (USA)

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

• Year
• 1915 ??

• Category
• Radio module pre 1926 (not a part, not a key)

• Radiomuseum.org ID
• 298662

• • alternative name: Lee De Forest Mfg.

• Number of Tubes
• 1

• Valves / Tubes
• Ultraudion

• Power type and voltage
• Storage and/or dry batteries

• Loudspeaker
• - - No sound reproduction output.

• Material
• Wooden case, TUBES VISIBLE.

• from Radiomuseum.org
• Model: Undamped Wave Oscillator - DeForest Radio Telephone &

• Shape
• Tablemodel, Box - most often with Lid (NOT slant panel).

• Mentioned in
• Lehrbuch der drahtlosen Telegraphie, Zenneck, 4. Aufl., 1916, S.520

• Author
• Model page created by a member from D. 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