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Country:  United States of America (USA)
Manufacturer / Brand:  DeForest Radio Telephone & Telegraph Co. (De Forest); New York
alternative name
Lee De Forest Mfg.
Year: 1921 Category: Broadcast Receiver - or past WW2 Tuner
Valves / Tubes 3:
Main principle Crystal or Solid State Detector with Amplifer
Power type and voltage Storage and/or dry batteries
Power out
from Model: Interpanel - DeForest Radio Telephone &
Shape Tablemodel, with any shape - general.
Notes Two dials (primary tuning control knobs)
Price in first year of sale 125.00 $
Collectors' prices  
External source of data Ernst Erb
Source of data Radio Collector`s Guide 1921-1932
Mentioned in Collector's Guide to Antique Radios 4. Edition

All listed radios etc. from DeForest Radio Telephone & Telegraph Co. (De Forest); New York
Here you find 138 models, 108 with images and 10 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.