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Since 1960, the TU-50M transmitting amplifier has been manufactured by the Slavgorod Instrument Plant. TU is designed for organization of radio broadcasting wire broadcasting in small towns or schools, with up to 200 radio points. In addition to the amplifier with EPU, the kit includes a linear shield for connecting lines, control and horn (10GRD5) loudspeakers, a radio receiver "Kazakhstan" and measuring device for lines IL-58. The amplifier was produced for a long time with different electric control units, control loudspeakers and circuit improvements.