Colorama FB-73 Farm Radio
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
- 1937 ?
- Category
- Broadcast Receiver - or past WW2 Tuner
- Radiomuseum.org ID
- 42074
-
- Brand: Musaphonic
Click on the schematic thumbnail to request the schematic as a free document.
- Number of Tubes
- 7
- Main principle
- Superheterodyne (common); ZF/IF 465 kHz; 3 AF stage(s)
- Tuned circuits
- 8 AM circuit(s)
- Wave bands
- Broadcast, Short Wave(s) and Police.
- Power type and voltage
- Storage Battery for all (e.g. for car radios and amateur radios) / 6 Volt
- Loudspeaker
- Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 8 inch = 20.3 cm
- Material
- Wooden case
- from Radiomuseum.org
- Model: Colorama FB-73 Farm Radio - General Electric Co. GE;
- Notes
-
The General Electric models Colorama FB-72, FB-73, FB-76 and FB-77 are "Farm Radios" wiht a Push-Pull output and Pentagrid Converter. Sync. Vibrator for +B. First tap on storage battery is used as filament supply. FB-72 and FB-76 have also a C-Battery - see also for a Bias-Cell. All 4 models are sharing the Rider's schematic 8-37 through 8-40. They features the Colorama tuning indicator (see post 5 etc.). In this case here it is only a Neon lamp which glows more or less, depending on the plate current of the 1E5G which control grid is connected to the ACG circuit. No reactor. A green stained light bulb is a tuning indicator for silent tuning only. Other Colorama systems have 7 lamps. This was a novelty in 1936 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 the tuning eye.
These models have a Magnetic Phonograph Pick-up with impedance 18,00 ohms at 1000cycles. Band B (Broadcast) covers 540 - 1600 kc, the band C (Fishery, Police etc.) 11600 - 5800 kc, and band D (SW) 5.8 - 18 mc. The Electrical Power Output is 1 watt undistorted and 1.6 watts maximum for FB-73 and FB-77 (storage battery) or 1.3 / 2.2 for FB-72 and FB-76. We doubt this information a bit. Other way round?Stein "Cathedral & Tombstone Radios" lists 2 bands for this model.
- External source of data
- Ernst Erb
- Circuit diagram reference
- Rider's Perpetual, Volume 8 = 1937 and before
- Mentioned in
- Cathedral & Tombstone Radios (page 120.)
- Other Models
-
Here you find 2910 models, 2135 with images and 2034 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