D10

DeForest Radio Telephone & Telegraph Co. (De Forest); New York

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  • Year
  • 1923
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 37074
    • alternative name: Lee De Forest Mfg.

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

 Technical Specifications

  • Number of Tubes
  • 4
  • Main principle
  • TRF (Tuned-Radio-Frequency but use of regeneration unknown); ZF/IF 3 kHz; 3 AF stage(s); Reflex
  • Tuned circuits
  • 1 AM circuit(s)
  • Wave bands
  • Broadcast only (MW).
  • Power type and voltage
  • Dry Batteries / 4.5 & 67.5 Volt
  • Loudspeaker
  • - This model requires external speaker(s).
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: D10 - DeForest Radio Telephone &
  • Shape
  • Tablemodel, Box - most often with Lid (NOT slant panel).
  • Dimensions (WHD)
  • 320 x 350 x 230 mm / 12.6 x 13.8 x 9.1 inch
  • Notes

  • One dial (primary tuning control knob). The D-10 is a 4-tube reflex receiver, using a crystal detector. Either Frank Squire or William Priess (the self-proclaimed "father of reflex") developed the D-10, although Gernsback gives credit for the invention of reflex to Marius Latour. In the D-10, two tubes have both RF and audio amplification functions. So, the receiver performs as a 6-tube radio (three stages of RF amplification and three stages of audio amplification) seven if the detector is considered. Reflexing is a rather sophisticated electrical design technique, since the interstage RF and audio transformers are arranged so that a single tube can perform two functions. For more information see "Antique Radio Classified" Volume 14, August 1997.

  • Net weight (2.2 lb = 1 kg)
  • 7.2 kg / 15 lb 13.7 oz (15.859 lb)
  • Price in first year of sale
  • 150.00 $
  • External source of data
  • Ernst Erb
  • Circuit diagram reference
  • Rider's Perpetual, Volume 1 = 1931/1934 (for 1919-1931)
  • Literature/Schematics (2)
  • Radio Broadcast, Aug. 1923, Page 338

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The model is part of the collections of the following members.

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