Colorama E-115

General Electric Co. (GE); Bridgeport CT, Syracuse NY

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  • Year
  • 1936
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 42029
    • Brand: Musaphonic

Click on the schematic thumbnail to request the schematic as a free document.

 Technical Specifications

  • Number of Tubes
  • 11
  • 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) / 115-120 Volt
  • Loudspeaker
  • Electro Magnetic Dynamic LS (moving-coil with field excitation coil) / Ø 12 inch = 30.5 cm
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: Colorama E-115 - General Electric Co. GE;
  • Shape
  • Console with any shape - in general
  • Notes
  • The General Electric model Colorama E-115 is listed at Rider's GE 8-56 through 8-60. The E-115 features the Colorama tuning indicator (see post 5 etc.). The AGC line controls the saturation of the "magnetic amplifier", a saturable core reactor. The reactor is in series with a red stained pilot lamp and a green stained light bulb behind the scale which turn the light to green when a carrior (station) is tuned in. Other Colorama systems have 7 lamps. Weak stations will produce a small color change and strong stations larger changes - a smooth process. 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.

    The model E-115 can have a 25 cycle transformer. Band B (Broadcast) covers 540 - 1660 kc, the band C (Fishery, Police etc.) 1600 - 6000 kc, and band D (SW) 5.4 - 18 mc.
  • External source of data
  • Ernst Erb
  • Circuit diagram reference
  • Rider's Perpetual, Volume 8 = 1937 and before

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