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Radio "BS-2" presumably since 1936 produced the Moscow plant "Himradio".
The BS-2 radio is assembled on three lamps, two in the receiver and one in the rectifier.
The receiver is built according to the regenerator circuit with one cascade of bass amplifier.
The range of received waves is 1850 ... 220 m. Maximum sensitivity with stable reception of 100 μV.
Maximum selectivity with steady reception of about 20 dB.
Listening to radio stations is carried out on high-impedance head phones.