Colorama E-105

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

Data
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  • Year
  • 1936
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 42027
    • Brand: Musaphonic

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

 Technical Specifications

  • Number of Tubes
  • 10
  • 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 12 inch = 30.5 cm
  • Power out
  • 6.5 W (14 W max.)
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: Colorama E-105 - General Electric Co. GE;
  • Shape
  • Console with any shape - in general
  • Dimensions (WHD)
  • 25 x 40 x 11.8 inch / 635 x 1016 x 300 mm
  • Notes
  • The General Electric models E-101, E-105 and E-106 share the same schematic (Rider's GE 7-29 through 7-32) and feature the Colorama tuning indicator (see post 5 etc.). 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 6J7 is for the AFC - not applied for the models E-91 and E-95. All these models can have a 25 cycle (C) or 60 cycle mains transformer which came in two versions, one fix for 105-120 volts (A), the other for 105 to 250 volts with 4 tappings (V). The band B (Broadcast) covers 540 - 1680 kc, the band C (Fishery, Police etc.) 1680 - 6000 kc and band D (SW) 6 - 18 mc.
  • Net weight (2.2 lb = 1 kg)
  • 72 lb (72 lb 0 oz) / 32.688 kg
  • Price in first year of sale
  • 100.00 $
  • External source of data
  • Ernst Erb
  • Circuit diagram reference
  • Rider's Perpetual, Volume 7 = 1936 and before

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The model Colorama E-105 is part of the collections of the following members.

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