Network tube radio receiver `` MS-539 ''.
Tube radios.DomesticSince 1939, the network radio receiver "MS-539" has been produced by the Alexandrovsky plant No. 3 NKS. By the XVIII Congress of the All-Union Communist Party of Bolsheviks, which opened on March 10, 1939, the MC-539 radio receiver (Small Superheterodyne, 5-liter lamp, 39 years old) was developed and released in an experimental series. Radio frequency ranges: DV - 150 ... 400 KHz. SV - 540 ... 1500 KHz. HF - 6 ... 18 MHz. Sensitivity in the ranges DV and SV 300 µV, KV 500 µV. Adjacent channel selectivity 20 dB. Rated output power per loudspeaker, bias 1 W. The model uses the ARG system. Power supply from AC 110, 127 or 220 V. Power consumption 50 W. From mid-1939, the production of the radio continued in series and ended in mid-1941.
