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31 AC

31 AC ; United American (ID = 772628) Radio
31 AC ; United American (ID = 772629) Radio
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31 AC ; United American (ID = 772628) Radio
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Country:  United States of America (USA)
Manufacturer / Brand:  United American Bosch (Magneto Corporation); Springfield (MA)
alternative name
American Bosch Magneto
Year: 1931 Category: Broadcast Receiver - or past WW2 Tuner
Valves / Tubes 6: 51 27 51 24 47 80
Main principle Superheterodyne (common); ZF/IF 175 kHz
Tuned circuits 5 AM circuit(s)
Wave bands Broadcast only (MW).
Power type and voltage Alternating Current supply (AC) / 105-120 Volt
Loudspeaker Electro Magnetic Dynamic LS (moving-coil with field excitation coil)
Power out
from Model: 31 AC - United American Bosch Magneto
Material Wooden case
Shape Console with any shape - in general
Notes 50-60 cycle.
External source of data Ernst Erb
Source of data The Radio Collector's Directory and Price Guide 1921 - 1965
Circuit diagram reference Rider's Perpetual, Volume 2 = 1932 (Models 1931/1932)
Literature/Schematics (1) Riders 2-2, 3

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.