A-5 1952
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The radio car "A-5" from 1952 produced the Murom radio plant. The A-5 receiver is a 6-tube superheterodyne and is intended for installation in ZIL-110, ZIM (GAZ-12) vehicles. It was produced in 2 versions, with power supply from batteries of 6 and 12 V. Powered anodes from the lamps from the vibrator. The receiver together with the loudspeaker and power supply unit is assembled in a common case. An additional loudspeaker stood at the back of the car or behind the partition. Tuning the receiver is done by changing the inductance of the coils by moving the cores from the alsifer. Inductance coils with a pushbutton switch, a power switch, volume controls and timbres made a separate unit. The scale with conditional graduation in the form of uniform divisions is illuminated from the ends, its color changes depending on the position of the tone controls using color filters mounted on the axes of the same controls; red emphasizes higher frequencies, green low, white indicates reproduction of mid frequencies of the sound spectrum. Technical parameters: Frequency ranges: DV 150 ... 410 kHz, CB 530 ... 1450 kHz, KV1 6 ... 6.25 MHz, KV2 9.5 ... 9.7 MHz, KV3 11.7 .. .11.9 MHz. IF 465 kHz. The sensitivity of the model in the DV range of 200, CB 50, in the range of 40 kV HF. The adjacent channel selectivity is 28 dB. On the mirror, 34 dB on the LW, 40 dB on the MW and 34, 30, 20 dB, respectively, on the HF subbands. The frequency range of 80 ... 5000 Hz. Output power 2 watts. Power consumption 53 watts. In 1951, the Leningrad Institute of Broadcasting Reception and Acoustics LIRPA, the old name of Scientific Research Institute-695, was given the task to develop the first serial car receiver for ZIS-110 and ZIM cars (aka GAZ-12) . The cars had a different voltage onboard network 6 and 12 V. respectively, therefore, 2 versions of the receiver were developed. The basis was taken receiver "A-695", developed by NII-695 in 1944. The factory of the PO Box No. 5 became the manufacturer of "A-5", later the Murom Radio Plant.Radio receivers were assembled by hand, thoroughly tested and sent to special garages, where masters trained by the factory installed them in cars. In each garage there was a stock of receivers, lamps, loudspeakers and vibration transducers in case of a failure of the receiver in any car. '' A-5 '' was released about 300 copies, and the issue ended in late 1959.
Documentation:
Information from collection of Valery Khartchenko