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30 Ch= 248

30 Ch= 248; Electrical Research (ID = 635456) Radio
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30 Ch= 248; Electrical Research (ID = 635456) Radio
Select picture or schematic to display from thumbnails on the right and click for download.
 
Country:  United States of America (USA)
Manufacturer / Brand:  Electrical Research Laboratories Inc. (Erla); Chicago, Illinois
Year: 1931 ? Category: Broadcast Receiver - or past WW2 Tuner
Valves / Tubes 7: 35 24 27 35 24 47 80
Main principle Superheterodyne (common); ZF/IF 175 kHz; Screengrid 1926-1935
Tuned circuits 7 AM circuit(s)
Wave bands Broadcast only (MW).
Details
Power type and voltage Alternating Current supply (AC)
Loudspeaker Permanent or electro-dynamic (moving coil), system not known yet.
Power out
from Radiomuseum.org Model: 30 Ch= 248 - Electrical Research
Material Wooden case
Shape Console with any shape - in general
External source of data Ernst Erb
Source of data Radio Collector`s Guide 1921-1932
Mentioned in The Radio Collector's Directory and Price Guide 1921 - 1965


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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