• 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
• 309266

• • alternative name: Lee De Forest Mfg.

• Number of Tubes
• 1

• Valves / Tubes
• Audion_dbw

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

• Power type and voltage
• Storage and/or dry batteries / 4,5 & 67,5 Volt

• Loudspeaker
• - For headphones or amp.

• Material
• Wooden case, TUBES VISIBLE.

• from Radiomuseum.org
• Model: Audion RJ9 - DeForest Radio Telephone &

• Shape
• Tablemodel, with any shape - general.

• Dimensions (WHD)
• 340 x 160 x 130 mm / 13.4 x 6.3 x 5.1 inch

• Notes

• Detector Module

• Net weight (2.2 lb = 1 kg)
• 1.6 kg / 3 lb 8.4 oz (3.524 lb)

• Mentioned in
• Radio Manufacturers of the 1920s, Vol 1 (page 164)

• Author
• Model page created by Musée des Radios Museum. 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