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Majestic Ch= 90-B (chassis only)

Majestic Ch= 90-B ; Grigsby-Grunow - (ID = 244698) Radio
Majestic Ch= 90-B ; Grigsby-Grunow - (ID = 677081) Radio
Majestic Ch= 90-B ; Grigsby-Grunow - (ID = 677082) Radio
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Majestic Ch= 90-B ; Grigsby-Grunow - (ID = 244698) 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 8: 27 27 27 27 27 45 45 80
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) / Adjustment plate for 105, 115 and 125 Volt
Loudspeaker Electro Magnetic Dynamic LS (moving-coil with field excitation coil)
Power out
from Model: Majestic Ch= 90-B - Grigsby-Grunow -Hinds Co.
Material Metal case
Shape Chassis only or for «building in»
Notes The 90-B is only the chassis employed for the console models 90, 91, 92, and 93. Since the manufacturer had applied stickers with the chassis type inside the cabinets, it is often assumed this is to be the Model name. This is not correct: it is a model family, using that chassis.
Please no pictures of cabinets here. They belong to the relevant models.
External source of data Ernst Erb
Circuit diagram reference Rider's Perpetual, Volume 1 = 1931/1934 (for 1919-1931)
Literature/Schematics (1) Beitman Radio Diagrams, Vol. 01, 1926-1938

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.