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The radio battery "Spartak" since 1947 produced the Minsk Radio Plant named after Molotov. The radio "Spartak" was created on the basis of the radio "Partizan". It is a battery superheterodyne, designed to work in the long 800 ... 2000 m ranges, average 200 ... 600 m, and short 15 ... 50 m, waves. The intermediate frequency is 460 kHz. Antenna sensitivity of 500 µV. The adjacent channel selectivity is 16 ... 20 dB. Rated output power 200 mW. Frequency range 100 ... 4000 Hz. The receiver is powered by a 3-volt filament battery and a 120-volt anode battery. Provided lighting scale.