Radio receiver `` PR-4P ''.
Receiving and transmitting radio equipment.The radio receiver "PR-4P" was produced presumably since 1957 by several enterprises of the country. The receiver was aviation, but it was also used as a liaison. It is a superheterodyne with one frequency conversion. IF - 112 kHz. Frequency range: 175 kHz - 12 MHz, divided into 5 sub-bands. The sensitivity is 10 µV in TLF and 4 µV in TLG. Adjacent channel selectivity is greater than 90 dB. The radio was powered by a 27 V umformer, providing 200 V for the anodes and 6.3 V for the heating.
