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20 K

20 K ; United American (ID = 27518) Radio
20 K ; United American (ID = 27519) Radio
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20 K ; United American (ID = 27518) 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 8: 51 27 51 51 27 47 47 80
Main principle Superhet with RF-stage; ZF/IF 175 kHz
Wave bands Broadcast only (MW).
Power type and voltage Alternating Current supply (AC) / 110 ; 120 Volt
Loudspeaker Electro Magnetic Dynamic LS (moving-coil with field excitation coil)
Power out
from Model: 20 K - United American Bosch Magneto
Material Wooden case
Shape Console with any shape - in general
External source of data E. Erb 3-907007-36-0
Source of data Collector's Guide to Antique Radios (7th Edition)
Circuit diagram reference Die «Thali Schemasammlung» führt das Modell.
Literature/Schematics (1) Rider's Perpetual, Volume 2 = 1932 and before

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.