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The radio battery "PTB-47" from 1947 produced Petropavlovsk plant named after SM Kirov. Radio "PTB-47" is a battery version of the network radio "PTS-47". The radio receiver used eight radio tubes of the series: CO-242, CO-258, 2К2М (3), 2Ж2М (2). It is designed to work in six bands: standard LW, MW and four HF subbands, smoothly covering the range from 19 to 76 meters. The sensitivity of the receiver is 50 ... 80 μV. Output power is about 100 mW. The receiver is powered by filament batteries "3C-L-30" and anodic "BAS-80-U1". The radio receiver was intended for rural radio broadcasting nodes, in localities that do not have electricity.