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Vibro-power Ch= 375 (Ed. 4)

Vibro-power Ch= 375 ; United American (ID = 2485481) Radio
Vibro-power Ch= 375 ; United American (ID = 2485447) Radio Vibro-power Ch= 375 ; United American (ID = 2485448) Radio
Vibro-power Ch= 375 ; United American (ID = 2485449) Radio Vibro-power Ch= 375 ; United American (ID = 2485451) Radio
Vibro-power Ch= 375 ; United American (ID = 2485467) Radio
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Vibro-power Ch= 375 ; United American (ID = 2485447) Radio
United American: Vibro-power Ch= 375 [Radio] ID = 2485447 1200x730
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For model Vibro-power Ch= 375 (Ed. 4), United American Bosch (Magneto Corporation); Springfield (MA)
 
Country:  United States of America (USA)
Manufacturer / Brand:  United American Bosch (Magneto Corporation); Springfield (MA)
alternative name
 
American Bosch Magneto
Brand
Essex
Year: 1934 ? Category: Broadcast Receiver - or past WW2 Tuner
Valves / Tubes 5: 2A7 58 2A6 2A5 80
Main principle Superheterodyne (common); ZF/IF 125 kHz; 2 AF stage(s)
Wave bands Broadcast (MW) and Long Wave.
Details
Power type and voltage Alternating Current supply (AC) / 110; 125; 150; 220 Volt
Loudspeaker Electro Magnetic Dynamic LS (moving-coil with field excitation coil) / Ø 18.5 cm = 7.3 inch
Power out
from Radiomuseum.org Model: Vibro-power Ch= 375 - United American Bosch Magneto
Material Wooden case
Shape Tablemodel, low profile (big size).
Dimensions (WHD) 575 x 340 x 245 mm / 22.6 x 13.4 x 9.6 inch
Notes

The circuit design is slightly different from the models 375/475. Specifically there are small differences in the AVC-circuit, AF amplifier bias circuit and front end tuned circuits.

Majority of the components are assembled on two perforated boards, which may have been preassemled for the production line.

The receiver has a similar front panel as the American Bosch model 475. However the speaker is not on top of the unit rather than to the right of the controls.

The chassis is identical to the one in model 375. The case seems to be deeper, so that the chassis rear is about 40 mm behind the rear wall plate.

Literature/Schematics (1) -- Schematic (Reverse engineered)

Model page created by Harri Lumme. See "Data change" for further contributors.



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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