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The radio receiver network lamp "Leningrad" from 1946 produced the Leningrad plant. Kozitsky. '' Leningrad '' is a first-class twelve-lamp superheterodyne radio receiver designed for receiving radio stations and replaying recordings from an external power unit. The peculiarity is the presence of stretched HF ranges and push-button settings for four waves. Since 1948, the receiver has been upgraded and released in 2 versions, with fixed and conventional tuning, on 11 lamps with a modified scheme and extended to 16 meters HF ranges. Technical parameters of the 1st variant: Frequency ranges with smooth tuning: DV - 150 ... 410 KHz, SV - 560 ... 1500 KHz, KV-I - 4.3 ... 7.5 MHz, KV-II - 9.495 ... 9.73 MHz, KV-III - 11.725 ... 12.005 MHz, KV-IV - 15.115 ... 15.46 MHz. Fixed tuning: the 1st button is 150 ... 225 KHz (2000 ... 1333 m), the 2nd button is 225 ... 340 KHz (1333 ... 882 m), the 3rd button is 580. ..870 kHz (517 ... 345 m), 4th button 900 ... 1350 kHz (333 ... 222 m). The IF is 460 kHz. Sensitivity: DV, SV - 180 µV, KV - 80 µV, with a push-button setting of 200 µV. The adjacent channel selectivity is 30 dB. The selectivity of the mirror channel on the DV and ST - 50 dB. The nominal output power of the amplifier is 4 watts, the maximum is 8 watts. The range of reproducible sound frequencies is 50..5000 Hz, when playing a record of 50..7.7 Hz. Power supply from AC 110, 127 or 220 V. Power consumption 120 watts.