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The "PLR-5" battery receiver, produced since the autumn of 1930, stands for Receiver Amateur Regenerative 5 Tube) is a receiver of direct amplification and serves to receive broadcasting stations in the range of 300 ... 1900 m. B-107 and UB-software. The first two serve to amplify the high frequency, the third detector, 4 and 5 work in two cascades of bass amplification. The receiver has 4 resonant circuits. The first antenna circuit is configured with a variometer and capacitor switching. The remaining three, included in the circuits of the RF and detector amplification lamp grids, are tuned with variable capacitors, the rotors of which are mounted on a common axis. The first 2 circuits have one variable capacitor with a small capacity for fine tuning. The receiver range is divided into 2 parts: 300 ... 800 m (1000 ... 375 kHz) and 750 ... 1900 m (400 ... 158 kHz). For each part there are separate coils in the resonant circuits, in the anode circuits of high-frequency lamps, for communication with the corresponding coils and feedback coils rotating inside the contour coils of the grid circuit of the detector lamp. Feedback coils rotate a common limb through a gear. Coils of all circuits and fixed capacitors of the antenna circuit are switched by a common roller switch. The connection of the detector lamp with the first cascade of low-frequency amplification and between the cascades of low-frequency transformer. Transformers pass a narrow band of frequencies. Telephone or loudspeaker can be included in the anode circuit of the lamp of the first or second stage of the bass amplification. For power, a battery of 4 ... 5 V and an anode battery of 80 or 160 V are needed. In the latter case, a negative bias is applied to the lamp grid of the output stage of the LF amplifier. The PLR-5 radio receiver was developed in mid-1930 to replace the BSh receiver, which is expensive and difficult to control.