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Radio battery "6PB-11" (radio shifting) from I-kv 1940 produced the Voronezh plant "Electrosignal". The 6PB-11 radio shifter is a superheterodyne type radio receiver on small-sized lamps powered by chemical current sources, intended for loud-speaking reception of radio broadcasting stations operating at wavelengths from 187.5 to 576 m (1600 ... 520 kHz), from 724 to 2000 m (415 ... 150 kilohertz) and from 16.7 to 50 m (18 ... 6 megahertz). Two packs are included in the kit of the shifter, in one of which the entire receiving part with the heat accumulator is placed, in the other - the reproducer and the power sources of the anodes of the lamps.