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D10

D10; DeForest Radio (ID = 754015) Radio
D10; DeForest Radio (ID = 2373118) Radio D10; DeForest Radio (ID = 2373119) Radio
D10; DeForest Radio (ID = 2373116) Radio D10; DeForest Radio (ID = 2373121) Radio
D10; DeForest Radio (ID = 2430856) Radio D10; DeForest Radio (ID = 2430857) Radio
D10; DeForest Radio (ID = 2304907) Radio D10; DeForest Radio (ID = 2254551) Radio
D10; DeForest Radio (ID = 2237935) Radio D10; DeForest Radio (ID = 2237936) Radio
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D10; DeForest Radio (ID = 2373118) Radio
DeForest Radio: D10 [Radio] ID = 2373118 1400x895
Select picture or schematic to display from thumbnails on the right and click for download.
For model D10, DeForest Radio Telephone & Telegraph Co. (De Forest); New York:
Collection privée (réf.: 96, 925, 1994)
 
Country:  United States of America (USA)
Manufacturer / Brand:  DeForest Radio Telephone & Telegraph Co. (De Forest); New York
alternative name
 
Lee De Forest Mfg.
Year: 1923 Category: Broadcast Receiver - or past WW2 Tuner
Valves / Tubes 4: DV3 DV3 DV3 DV3
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).
Details
Power type and voltage Dry Batteries / 4.5 & 67.5 Volt
Loudspeaker - This model requires external speaker(s).
Power out
from Radiomuseum.org Model: D10 - DeForest Radio Telephone &
Material Wooden case
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 $
Collectors' prices  
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 Collector's Guide to Antique Radios 4. Edition
Literature/Schematics (1) Radio Manufacturers of the 1920s, Vol 1 (page 176)
Literature/Schematics (2) Radio Broadcast, Aug. 1923, Page 338
Literature/Schematics (3) Le Guide du Collectionneur TSF Biraud/Foster, Vol. I (page 146)


All listed radios etc. from DeForest Radio Telephone & Telegraph Co. (De Forest); New York
Here you find 154 models, 127 with images and 11 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.




  
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