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The radio battery "PKV-6" from 1928 produced the Leningrad Kozitsky plant. The "PKV-6" radio receiver (Short Wave Model 6 Receiver) is a regenerative receiver operating according to Schnell's scheme with two stages of LF amplification. The receiver was used mainly on downstream shortwave radio stations. Reception can be carried out both from a vertical antenna connected directly to the receiver, and from a symmetric remote one connected to the receiver by a two-wire feeder (balanced input). A set of 6 interchangeable coils is attached to the receiver. Overlapped by individual coils wavelengths are indicated on the handles of the coils. The range of overlapping interchangeable coils waves 12 ... 300 meters. Applied lamps PT-2 or UB-107. For power supply voltage of 4 V and anode 80 V is necessary.