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The radio battery "Riga B-912" from 1949 produced the Riga plant "Radiotekhnika". Radio '' Riga B-912 '' is built according to the direct amplification scheme 0-V-1, with softly adjustable feedback. It works on two small lamps and is designed to work with an outdoor antenna in the ranges of DV, ST. An anode battery of 80 V and an incandescent of 1.2 V are used for power. Ranges: DV 150 ... 415 kHz and CB 520..1500 kHz The maximum sensitivity on the threshold of generation is 4 mV / m. Selectivity at the entered feedback 25 dB. The current is 180 mA, the anode is 5 mA. Rated output power 70 mW. Dimensions of receiver 257x206x140mm. Its weight is 3.5 kg.