radiomuseum.org
Please click your language flag. Bitte Sprachflagge klicken.

Colorama E-91 Ch= RBS-21

Colorama E-91 Ch= RBS-21; General Electric Co. (ID = 642434) Radio
 
Colorama E-91 Ch= RBS-21; General Electric Co. (ID = 642437) Radio
 
Colorama E-91 Ch= RBS-21; General Electric Co. (ID = 642440) Radio
 
Colorama E-91 Ch= RBS-21; General Electric Co. (ID = 642442) Radio
 
Colorama E-91 Ch= RBS-21; General Electric Co. (ID = 642448) Radio
Colorama E-91 Ch= RBS-21; General Electric Co. (ID = 642316) Radio Colorama E-91 Ch= RBS-21; General Electric Co. (ID = 642370) Radio
Colorama E-91 Ch= RBS-21; General Electric Co. (ID = 642317) Radio Colorama E-91 Ch= RBS-21; General Electric Co. (ID = 642369) Radio
Colorama E-91 Ch= RBS-21; General Electric Co. (ID = 642371) Radio Colorama E-91 Ch= RBS-21; General Electric Co. (ID = 642372) Radio
Colorama E-91 Ch= RBS-21; General Electric Co. (ID = 642373) Radio Colorama E-91 Ch= RBS-21; General Electric Co. (ID = 642374) Radio
Colorama E-91 Ch= RBS-21; General Electric Co. (ID = 720477) Radio Colorama E-91 Ch= RBS-21; General Electric Co. (ID = 1243015) Radio
Use red slider bar for more.
Colorama E-91 Ch= RBS-21; General Electric Co. (ID = 642316) Radio
General Electric Co.: Colorama E-91 Ch= RBS-21 [Radio] ID = 642316 572x700
Select picture or schematic to display from thumbnails on the right and click for download.
For model Colorama E-91 Ch= RBS-21, General Electric Co. (GE); Bridgeport CT, Syracuse NY:
By courtesy of Sean Barton in the U.S.A.
 
Country:  United States of America (USA)
Manufacturer / Brand:  General Electric Co. (GE); Bridgeport CT, Syracuse NY
Brand
 
Musaphonic
Year: 1936 Category: Broadcast Receiver - or past WW2 Tuner
Valves / Tubes 9: 6K7 6A8 6K7 6K7 6C5 6H6 6F5 6L6 5Z4
Main principle Superhet with RF-stage; ZF/IF 465 kHz; 2 AF stage(s)
Tuned circuits 9 AM circuit(s)
Wave bands Broadcast, Short Wave(s) and Police.
Details
Power type and voltage Alternating Current supply (AC) / 25 or 60 cycles: 105 - 120 or 115; 125; 220; 240 Volt
Loudspeaker Electro Magnetic Dynamic LS (moving-coil with field excitation coil) / Ø 8 inch = 20.3 cm
Power out
from Radiomuseum.org Model: Colorama E-91 Ch= RBS-21 - General Electric Co. GE;
Material Wooden case
Shape Tablemodel, high profile (upright - NOT Cathedral nor decorative).
Dimensions (WHD) 15.875 x 20.06 x 11.36 inch / 403 x 510 x 289 mm
Notes The General Electric models E-91 and E-95 share the schematic RBS-21 and feature the Colorama tuning indicator (see post 5 etc.). Here the triode 6C5 commands depending on the AGC line the saturation of the "magnetic amplifier", a saturable core reactor. The reactor is in series with a row of 4 red stained pilot lamps and 3 green stained light bulbs behind the scale which turn the light to green when a carrior (station) is tuned in. Weak stations will produce a small color change and strong stations larger changes - a smooth process. This was then a novelty for GE sets - the Magic Eye was just on the market but GE wanted first to have it's own gadget which was a problem to service men and the cost was over twice that of teh tuning eye.

The models can have a 25 cycle or 60 cycle mains transformer which came in two versions, one fix for 105-120 volts , the other for 105 to 250 volts with 4 tappings. The band B (Broadcast) covers 540 - 1680 kc, the band C (Fishery, Police etc.) 1680 - 6000 kc and band D (SW) 6 - 18 mc.
Mentioned in Machine Age to Jet Age II (page 139.)
Literature/Schematics (1) Rider's Perpetual, Volume 7 = 1936 and before (General Electric 7-25 through 7-28)
Literature/Schematics (2) Cathedral & Tombstone Radios (page 119.)

Model page created by Ernst Erb. See "Data change" for further contributors.



All listed radios etc. from General Electric Co. (GE); Bridgeport CT, Syracuse NY
Here you find 2745 models, 1918 with images and 1939 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.




  
rmXorg