Majestic Ch= 90 (chassis only)

Majestic Ch= 90 ; Grigsby-Grunow - (ID = 450661) Radio
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Majestic Ch= 90 ; Grigsby-Grunow - (ID = 450661) Radio
Select picture or schematic to display from thumbnails on the right and click for download.
Country:  United States of America (USA)
Manufacturer / Brand:  Grigsby-Grunow (-Hinds) Co. (Majestic pre 1933); Chicago (IL)
Year: 1929/1930 Category: Broadcast Receiver - or past WW2 Tuner
Valves / Tubes 7: 27 27 27 27 27 45 45
Main principle TRF without regeneration; 1 AF stage(s); Neutrodyne
Tuned circuits 5 AM circuit(s)
Wave bands Broadcast only (MW).
Power type and voltage Alternating Current supply (AC) / 100-130 Volt
Loudspeaker Electro Magnetic Dynamic LS (moving-coil with field excitation coil)
Power out
from Model: Majestic Ch= 90 - Grigsby-Grunow -Hinds Co.
Material Metal case
Shape Chassis only or for «building in»
Notes The 90 is only the chassis employed for the console models 91 and 92. It needs Power Supply 9P3 or 9P6. It is the predecessor of chassis 90-B where an integral Power Supply was employed. Don't confound it with the console model 90, which used the chassis 90-B.
Please no pictures of cabinets here. They belong to the relevant models.
Circuit diagram reference Rider's Perpetual, Volume 1 = 1931/1934 (for 1919-1931)
Literature/Schematics (1) Beitman Radio Diagrams, Vol. 01, 1926-1938

Model page created by Konrad Birkner † 12.08.2014. See "Data change" for further contributors.

All listed radios etc. from Grigsby-Grunow (-Hinds) Co. (Majestic pre 1933); Chicago (IL)
Here you find 200 models, 118 with images and 156 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.