Colorama E-91 Ch= RBS-21
General Electric Co. (GE); Bridgeport CT, Syracuse NY
- Country
- United States of America (USA)
- Manufacturer / Brand
- General Electric Co. (GE); Bridgeport CT, Syracuse NY
- Year
- 1936
- Category
- Broadcast Receiver - or past WW2 Tuner
- Radiomuseum.org ID
- 158446
-
- Brand: Musaphonic
By courtesy of Sean Barton in the U.S.A.
By courtesy of Sean Bartion in the U.S.A.
By courtesy of Sean Barton in the U.S.A.
By courtesy of Sean Bartion in the U.S.A.
By courtesy of Sean Bartion in the U.S.A.
By courtesy of Sean Bartion in the U.S.A.
By courtesy of Sean Bartion in the U.S.A.
By courtesy of Sean Bartion in the U.S.A.
General Electric E-91 Front View #1
General Electric E-91 Front View #2
General Electric E-91 Dial and Knobs
General Electric E-91 Knob closeup
General Electric E-91 Chassis
General Electric E-91 Rear View #1
General Electric E-91 Speaker
General Electric E-91 Label
Click on the schematic thumbnail to request the schematic as a free document.
- Number of Tubes
- 9
- 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.
- 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
- Material
- Wooden case
- from Radiomuseum.org
- Model: Colorama E-91 Ch= RBS-21 - General Electric Co. GE;
- 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.)
- Author
- Model page created by Ernst Erb. See "Data change" for further contributors.
- Other Models
-
Here you find 2918 models, 2141 with images and 2045 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
All listed radios etc. from General Electric Co. (GE); Bridgeport CT, Syracuse NY
Collections
The model Colorama E-91 is part of the collections of the following members.