Since 1950, the Baltika network tube radio receiver (RZ-1) has been produced by the Riga VEF Radio Plant and the Gorky ZIL Plant.
Since February 1950, at the VEF Riga State Enterprise (PO Box 45), and later at the Gorky Plant named after Lenin, they began serial production of the 2nd class desktop superheterodyne radio receiver Baltika (P3-1).
The receiver is six-tube;
6A7, 6K3, 6G2, 6P6S, 6E5S, 5Ts4S, works in the ranges: LW - 2000 ... 732 m, NE - 577 ... 187 m, KV1 - 76 ... 32.3 m, KV2 - 33.3
... 24.8 m. Sensitivity at LW, MW - 200 μV, HF - 300 μV, from pickup sockets 0.25 V. Selectivity on adjacent channels 26 dB.
The rated output power of an amplifier on a 3GDMP-type loudspeaker is at least 2 watts.
The range of sound frequencies reproduced by own speakers is 100 ... 4000 Hz.
Power consumption from the electric network is 70 watts.
The case is made of wood, veneered, with dimensions of 560x360x280 mm.
The mass of the receiver is 15 kg.
The control knobs are located on the front panel;
the volume on the left and the main switch are small, the tone switch is large on the left, the setting is small on the right, and the range switch is large and the VLF input is turned on.
At the rear, on the chassis are the jacks for the antenna, ground, additional speaker, pickup, and mains voltage selector.
The Baltika radio has been modernized several times, at least two such upgrades are known.
Information on such changes is available on the website of Nikolai Baranov from the mountains.
Riga.
Additional letters and the number "RZ-1" - possibly reflect the names of the developer of the first (1) receiver circuit L. Ratiner and designer M. Zalevsky.
GOST 5651-51 has not yet been involved, but many of the parameters of the Baltika radio have already been adjusted to it.
The experimental series (~ 50 copies) of the Baltika radio receiver (P3-1) was released at the WEF factory in December 1949.