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74 Ch= 210

74 Ch= 210; Electrical Research (ID = 635657) Radio
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74 Ch= 210; Electrical Research (ID = 635657) 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: 1930 Category: Broadcast Receiver - or past WW2 Tuner
Valves / Tubes 7: 32 32 30 30 30 71A 71A
Main principle TRF (Tuned-Radio-Frequency but use of regeneration unknown); Screengrid 1926-1935
Tuned circuits 4 AM circuit(s)
Wave bands Broadcast only (MW).
Details
Power type and voltage Direct Current supply (DC) / 110 Volt
Loudspeaker Electro Magnetic Dynamic LS (moving-coil with field excitation coil)
Power out
from Radiomuseum.org Model: 74 Ch= 210 - Electrical Research
Notes 4-gang condenser; push-pull af output stage.
Circuit diagram reference Rider's Perpetual, Volume 2 = 1932 (Models 1931/1932)

Model page created by Hans-Joachim Korn † 16.11.15. See "Data change" for further contributors.



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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