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The three-program receiver "Sverdlovsk-201" since 1986 produced the Sverdlovsk plant of radio equipment. PT '' Sverdlovsk-201 '', (since 1987 '' Sverdlovsk PT-201 '') - designed to play programs transmitted over the network of three-program wire broadcasting. It is designed for a wire compacted radio network with a voltage of 30 V. The power of the PT is produced from the mains at 220 volts. To listen to the first, the main program of the PT can be used as a normal radio without switching on the electrical network. The range of sound frequencies on the main channel with or without gain 100 ... 10000 Hz, two high-frequency channels 100 ... 6300 Hz. The frequencies of the HF channels are 78 and 120 kHz.