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Country:  United States of America (USA)
Manufacturer / Brand:  Diamond T. Radio Manufacturers; South Bend, IN
Year: 1928 Type: Broadcast Receiver - or past WW2 Tuner
Valves / Tubes 6:
Principle TRF (Tuned-Radio-Frequency but use of reaction/regeneration unknown)
Power type and voltage Alternating Current supply (AC)
Power out
from Model: S.D. - Diamond T. Radio Manufacturers
Notes One dial (primary tuning control knob)
Price in first year of sale 120.00 $
External source of data Ernst Erb
Source of data Radio Collector`sGuide 1921-1932 (Collectors)

All listed radios etc. from Diamond T. Radio Manufacturers; South Bend, IN
Here you find 23 models, 8 with images and 1 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.