Telegraph radio station `` North ''.
Receiving and transmitting radio equipment.The telegraph radio station "Sever" has been produced since 1941 by the Leningrad plant of Kozitsky. Three lamps. Produced in versions with frequency ranges: 3.62 ... 12.25 MHz, 3.62 ... 6.25 MHz, 2.22 ... 6.66 MHz and 2.56 ... 5.77 MHz ... Transmitter output power 1.2 W. The power is battery-rechargeable. PC dimensions - 180x150x100 mm. Weight without power supply 3 kg. Tuning to the frequency was carried out according to the graphs, since the scales of the receiver and transmitter had conditional degrees. Antenna "oblique beam" - a wire 12 m long, which is thrown onto any tree or structure, and a sectional counterweight, located at a height of 1 m from the ground in the direction of the correspondent. When choosing the optimal frequency, it was possible to ensure reliable communication with the radio center, which had a trunk equipment and a directional antenna, at distances of up to 700 km. In 1942, the radio station was modernized and produced under the name "Sever-bis" (reception of 2 sub-bands: 2.22 ... 6.66 MHz, transmission of 2 sub-bands: smooth 2.56 ... 5.77 MHz and three stabilized frequencies. The output power is about 2.5 watts.
