Leningrad-50 1950
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Since the beginning of 1950, the Leningrad-50 lamp network receiver has been producing the Leningrad Plant. Kozitsky. Receiver '' Leningrad-50 '' (L-50) was developed in 1949 and is a 15-tube first-class superheterodyne with AC power. Power consumption 190 watts. The receiver is equipped with 2 frame antennas. Silent tuning is introduced into the receiver, which allows eliminating noise in the moments of restructuring in the LW and ST bands. 8 ranges: LW, MW, 6 KV: 19, 25, 31, 41, 49 m, with stretched scales for easy tuning and a viewing 40 ... 75 m. HF and LF, fine tuning indicator, silent range switching. High sound quality is achieved by using two different-frequency loudspeakers. Output power 4 watts. The range of reproduced frequencies, with a wide bandwidth on the IF (18 kHz) 60 ... 8000 Hz, with an average (9 kHz) 60 ... 4000 Hz, with a narrow (5 kHz) 60 ... 2400 Hz. The receiver can be used to play recordings from records using a separate electric player. The device is assembled on two metal chassis. On one the HF part is assembled, on the other ULF and the rectifier. The loudspeakers are mounted side by side on a reflective board, covered with a decorative fabric on the outside. Frame antennas are mounted inside the case in 2 mutually perpendicular planes: one on the right, the other under the top cover. A large horizontal scale is located at the bottom of the front panel. On the sides of the scale are all the control knobs - two single and two twin. The 1st knob on the left is the network switch and volume, the 2nd (dual) knob is the IF control and at the same time the HF tone control, the other is the LF tone control, the 3rd (dual) setting is the receiver and the antenna switch and the pickup switch (small), 4th range switch. On the back of the first chassis are the antenna and grounding terminals, the pickup jacks, the slotted axis for adjusting the silent tuning.On the back of the 2nd chassis is located the network switch and fuse. Here are the switch and jacks additional dynamics. The dimensions of the receiver are 650x445x350 mm. Weight 37 kg.
Documentation:
Information from collection of Valery Khartchenko