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R1 & A

R1 & A ; Electrical Research (ID = 634620) Radio
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R1 & A ; Electrical Research (ID = 634620) 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: 1928 Category: Broadcast Receiver - or past WW2 Tuner
Valves / Tubes 10: 26 26 26 26 27 26 50 50 81 81
Main principle TRF (Tuned-Radio-Frequency but use of regeneration unknown)
Wave bands Broadcast only (MW).
Details Record Player (perh.Changer)
Power type and voltage Alternating Current supply (AC)
Loudspeaker Electro Magnetic Dynamic LS (moving-coil with field excitation coil)
Power out
from Radiomuseum.org Model: R1 & A - Electrical Research
Notes Push-pull af output stage;
This model is a combination of the "R1" rf-unit and the "A" af-unit.
External source of data Ernst Erb
Circuit diagram reference Rider's Perpetual, Volume 1 = 1931/1934 (for 1919-1931)


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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