• Country
• United States of America (USA)

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

• Year
• 1916

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

• Radiomuseum.org ID
• 138205

• • alternative name: Lee De Forest Mfg.

• Number of Tubes
• 1

• Valves / Tubes
• T_deForest

• Main principle
• Detector with Vacuum Tube (Valve), no tuner

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

• Loudspeaker
• - For headphones or amp.

• Material
• Wooden case, TUBES VISIBLE.

• from Radiomuseum.org
• Model: Ultraudion Detector UJ 1 - DeForest Radio Telephone &

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

• Notes
• Purely an Ultraudion (regenerative) detector without tuning elements. Needs a pre-tuner. For damped and undamped waves (by regeneration). Released August 1916.

• Price in first year of sale
• 28.00 $

• Source of data
• - - Manufacturers Literature

• Mentioned in
• QST Sept. and Nov.1916, Ads

• Literature/Schematics (1)
• Radio Manufacturers of the 1920s, Vol 1 (p.164)

• Author
• Model page created by Otto Frosinn. See "Data change" for further contributors.

• Other Models

• Here you find 158 models, 133 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