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The television receiver of the color image "Rainbow" by an experimental batch was released in 1962 by the Leningrad Kozitsky Plant. An experienced color TV '' Rainbow '' was developed on the basis of production models of Japanese and American firms. The television operated on twelve television channels and received television programs in color using the NTSC system. The TV used a round metal-glass kinescope type 53LK4TS and 36 radio tubes. Two wide-band loudspeakers with a power of 5 W each worked in the speaker system of the device. Several dozens of televisions were released, which were used in experiments to develop systems for receiving and transmitting color images.