Since 1959, the Izumrud-203 television receiver for color images has been prototype produced by the Moscow Television Plant.
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"Izumrud-203" is a floor-standing projection TV for receiving color and b / w television broadcasts.
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The TV is made in the form of a console structure in a case veneered with valuable wood species.
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The color image is formed by a system of mirrors and three projection tubes that focus the television image on a special screen located in the cover of the case, which opens and stands vertically when watching television.
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The visible size of the image is 350 x 460 mm.
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The TV works in any of the 12 channels of the MW range.
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Sensitivity 30 μV.
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The speaker system consists of three loudspeakers, one woofer and two midrange located on the sides of the case.
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The range of reproducible frequencies is 50 ... 12000 Hz.
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The TV has 36 radio tubes and 22 diodes.
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Maximum output power 6 W.
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Power consumption 400 watts.
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When viewing black-and-white television broadcasts, one projection kinescope or all three could work, while it was possible to obtain image shades.
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The main control knobs are located at the top of the case and are accessible by opening the cover with the screen.
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The control knobs for the alignment unit are located on a vertical panel with a hinged cover.
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All auxiliary control knobs are located at the bottom of the hinged case.
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In a batch of TVs, high-quality sound is provided by four loudspeakers (4GD-1 - 2 pcs. And 1GD-9 - 2 pcs.).
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The design, layout, chassis, as well as optical systems, radio tubes, control knobs and characteristics are the same with the Izumrud-201 projection TV.
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The screen of the Emerald-203 TV is smaller than that of the Emerald-201 model, so the brightness of the screen here is higher than in the basic TV.
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Engineers developers: V.M. Khakharev, V.Ya. Rotenberg, S.E. Kishinevsky, L.A. Chicherina.
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The TV was produced at the request of organizations and trade from November 1959 to March 1962.
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A total of 263 TV sets "Izumrud-203" were manufactured.
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