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Majestic Ch= 360

Majestic Ch= 360; Grigsby-Grunow - (ID = 214743) Radio
 
Majestic Ch= 360; Grigsby-Grunow - (ID = 23977) Radio
 
Majestic Ch= 360; Grigsby-Grunow - (ID = 670449) Radio
 
Majestic Ch= 360; Grigsby-Grunow - (ID = 670450) Radio
 
Majestic Ch= 360; Grigsby-Grunow - (ID = 670451) Radio
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Majestic Ch= 360; Grigsby-Grunow - (ID = 214743) Radio
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Country:  United States of America (USA)
Manufacturer / Brand:  Grigsby-Grunow (-Hinds) Co. (Majestic pre 1933); Chicago (IL)
Year: 1932 ? Category: Broadcast Receiver - or past WW2 Tuner
Valves / Tubes 11: G-58-S G-56 G-58-S G-58-S G-56 G-57-S G-57-S G-56 59 59 G-82
Main principle Superhet with RF-stage; ZF/IF 175 kHz; 3 AF stage(s)
Tuned circuits 7 AM circuit(s)
Wave bands Broadcast only (MW).
Details
Power type and voltage Alternating Current supply (AC) / 117 Volt
Loudspeaker Electro Magnetic Dynamic LS (moving-coil with field excitation coil)
Power out
from Radiomuseum.org Model: Majestic Ch= 360 - Grigsby-Grunow -Hinds Co.
Material Metal case
Shape Chassis only or for «building in»
Notes The series 300 models are fitted either with a large G-14-F speaker or have twin speaker G-19-B and G-19-C. Grigsby-Grunow uses here the first time their "Automatic Synchro-Silent Tuning", variing a tuning light by a reactor with 3 legs of iron core. Two legs are connected in series with the pilot light, while the winding on the center leg is connected in series with the plates of the RF First Detector, and IF tubes. An electrolytic condenser (C-5) shunts the center winding for not getting any AC if there are unbalances. They call the system also "Reactance Resonance Indicator". When a station is tuned in, an automatic bias voltage is built across Resistor R-9, causing the pilot light to dim.
External source of data E. Erb 3-907007-36-0
Circuit diagram reference Die «Thali Schemasammlung» führt das Modell.
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.



  
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