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7

7 ; United American (ID = 772046) Radio
7 ; United American (ID = 517021) Radio
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7 ; United American (ID = 517021) Radio
United American: 7 [Radio] ID = 517021 640x480
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For model 7, United American Bosch (Magneto Corporation); Springfield (MA):
UNITED AMERICAN BOSCH-- '--USA MODELLO -7 A VALVOLE N.5
 
Country:  United States of America (USA)
Manufacturer / Brand:  United American Bosch (Magneto Corporation); Springfield (MA)
alternative name
 
American Bosch Magneto
Brand
Essex
Year: 1931 ? Category: Broadcast Receiver - or past WW2 Tuner
Valves / Tubes 5: 36 36 36 37 33
Main principle TRF without regeneration; Screengrid 1926-1935
Tuned circuits 3 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: 7 - United American Bosch Magneto
Material Wooden case
Shape Tablemodel, with any shape - general.
External source of data Ernst Erb
Circuit diagram reference Rider's Perpetual, Volume 3 = 1933 and before
Literature/Schematics (1) Riders 3-4


All listed radios etc. from United American Bosch (Magneto Corporation); Springfield (MA)
Here you find 412 models, 158 with images and 269 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.




  
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