• Country
• United States of America (USA)

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

• Year
• 1925/1926

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 37090

• • alternative name: Lee De Forest Mfg.

Click on the schematic thumbnail to request the schematic as a free document.

• Number of Tubes
• 5

• Valves / Tubes

• Main principle
• TRF without regeneration; 2 AF stage(s)

• Tuned circuits
• 3 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Storage and/or dry batteries / 6 & 22.5 x 4 & 4.5 Volt

• Loudspeaker
• Presumably Dynamic Loudspeaker (moving coil)

• Material
• Wooden case

• from Radiomuseum.org
• Model: F-5-P [Portable] - DeForest Radio Telephone &

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

• Dimensions (WHD)
• 15.25 x 11 x 14 inch / 387 x 279 x 356 mm

• Notes

• Three dials (primary tuning control knobs)

  Portable model in brown leatherette (fabricoid) covered carrying case complete with built-in cone type loud speaker, antenna and reel for same.

• Net weight (2.2 lb = 1 kg)
• 37 lb (37 lb 0 oz) / 16.798 kg

• Price in first year of sale
• 130.00 $

• External source of data
• Ernst Erb

• Source of data
• Radio Collector`s Guide 1921-1932

• Circuit diagram reference
• Rider's Perpetual, Volume 1 = 1931/1934 (for 1919-1931)

• Mentioned in
• The Radio Collector's Directory and Price Guide 1921 - 1965 (January 1926, Electrical Record Supplement page 31)

• 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