• Country
• United States of America (USA)

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

• Year
• 1920

• Category
• Amateur Transmitter (only)

• Radiomuseum.org ID
• 196269

• • alternative name: Lee De Forest Mfg.

• Number of Tubes
• 3

• Valves / Tubes

• Main principle
• Transmitter

• Power type and voltage
• Storage and/or dry batteries / 2-6 Volt

• Loudspeaker
• - - No sound reproduction output.

• Material
• Various materials

• from Radiomuseum.org
• Model: Radiophone Portable Transmitter Buzzer Type OT-5 - DeForest Radio Telephone &

• Shape
• Tablemodel, with any shape - general.

• Notes
• DeForest Oscillion transmitter. Operates on two 6 Volt storage batteries; no "B" battery or other outside source of high potential needed.

• Price in first year of sale
• 135.00 $

• Literature/Schematics (1)
• September 1920 QST advertisement

• Author
• Model page created by Alan Larsen. See "Data change" for further contributors.

• Other Models

• Here you find 158 models, 132 with images and 15 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