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Since 1928, the radio receiver battery "BCH-N" produced the Trust for the Weak Current Plants, specifically the Moscow Moselektrik Plant and the Leningrad Kozitsky Plant. "BC-N" - a more advanced type of radio "BS". The name '' BCh-N '', stands for Borusevicha Four-Lamp, Desktop. Another radio was called as "PL-4". Four-tube regenerative receiver "BCh-N" assembled according to the scheme 1-V-2. It is mounted in a box in the form of an elegant wooden console. The wavelength range is 300 ... 1850 meters. Smooth tuning of the antenna circuit of the receiver is performed using a variometer and tuning in jumps - by switching on using a plug of various fixed capacitors. The interlamp contour is tuned using a variometer and a variable capacitor mounted on one axis, covering the entire range when rotated 180 °. Feedback is set using the communication variometer. To enable increased anode voltage and grid battery, special terminals are connected. The rest of the receiver is similar to the receiver of the warhead, but more simple to manage. When using a special lamp with an anodic voltage increased to 160 volts in the last cascade, 2 or 3 Record loudspeakers can be loaded from the receiver. The price of the radio is 36 rubles 23 kopecks. Since the start of production by the Moselektrik plant, the receiver has been referred to as the "PL-4". From the middle of the year, the receiver has been renamed to "BCh-N".