• Country
• United States of America (USA)

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

• Year
• 1922

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 205389

• • alternative name: Lee De Forest Mfg.

• Number of Tubes
• 1

• Valves / Tubes

• Main principle
• TRF with regeneration

• Wave bands
• Broadcast only (MW).

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

• Loudspeaker
• - For headphones or amp.

• Material
• Wooden case

• from Radiomuseum.org
• Model: Radio-Craft Radiophone D-4 [Portable Model] - DeForest Radio Telephone &

• Shape
• Portable set > 8 inch (also usable without mains)

• Notes
• Radio-Craft Radiophone D-4 Portable 1-Tube regenerative receiver. This was a boxed set with a lid with carrying handle. Radio-Craft also built this model in a table model version the D-4R.

• Author
• Model page created by Alan Larsen. 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