Volna-K radio receiver
From 1959 to 1985 radio receiver Volna-K was produced by the Petropavlovsk Radio Plant. Volna-K is a special telephone and telegraph radio receiver for radio communications on coastal and long-distance vessels and as an auxiliary receiver in the Navy.
The receiver has 16 radio tubes and operates in 9 subbands, overlapping frequencies from 12 KHz to 23 MHz. The receiver has a control loudspeaker, headphone jacks. A double frequency conversion and a step change in the passband of the second IF of 0.5, 1.5 and 6 KHz are applied.