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7 Tube

Country:  United States of America (USA)
Manufacturer / Brand:  Electrical Research Laboratories Inc. (Erla); Chicago, Illinois
Year: 1930 Category: Broadcast Receiver - or past WW2 Tuner
Valves / Tubes 7:
Main principle TRF (Tuned-Radio-Frequency but use of regeneration unknown); Screengrid 1926-1935
Details
Power type and voltage Alternating Current supply (AC)
Loudspeaker
Power out
from Radiomuseum.org Model: 7 Tube - Electrical Research
Shape Tablemodel, Mantel/Midget/Compact up to 14" width, but not a Portable (See power data. Sometimes with handle but for mains only).
Notes One dial (primary tuning control knob)
Price in first year of sale 69.00 $
External source of data Ernst Erb
Source of data Radio Collector`s Guide 1921-1932


All listed radios etc. from Electrical Research Laboratories Inc. (Erla); Chicago, Illinois
Here you find 131 models, 45 with images and 61 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.



  
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