Professional radio receiver `` PCCU ''.
Receiving and transmitting radio equipment.The professional radio receiver "PTSKU" has been produced since 1933 by the Kazitsky plant. The professional superheterodyne radio receiver "PCKU" is intended for the equipment of large radio centers that provide commercial communications on short waves over fairly long distances, in particular, in the early 30s with the United States. In 1935, the electrical circuit and characteristics of the radio were improved. The "PKTSU" radio receiver was produced until mid-1941.