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Radio line network lamps "Promin", "Promin-2" and "Promin-M" from 1963, 1964 and from 1965 were produced by the Dnepropetrovsk radio plant. The third class radio "Promin" is a four-lamp radio receiver combined with the universal 3-speed electric playing device EPU-5. Ranges: DV 150 ... 408 kHz, CB 520 ... 1600 kHz and survey HF 3.95 ... 12.1 MHz. Sensitivity in the ranges of DV, CB 200 µV, KV 300 µV. IF 465 kHz. The adjacent channel selectivity is 30 dB. The nominal output power of the amplifier is 0.5 watts. The range of reproduced frequencies when receiving 150 ... 3500 Hz and when listening to recordings 150 ... 5000 Hz. Power consumption is 45 W when receiving and 60 W when playing records. The loudspeaker system consists of two loudspeakers type 1GD-9. Dimensions of the radiogram 440x260x320 mm. Weight 11 kg. Since 1964, the plant produced the "Promin-2" radio line, similar in design and appearance to that described, but now with the VHF range instead of HF. The electrical circuit was reworked, which increased the sensitivity of the AM path, and the frequency band increased to 100 ... 4000 Hz when received in the AM band and 100 ... 7000 Hz when received in the FM and listening to the recording. In 1965, the radio was upgraded to the model "Promin-M". Due to the low sensitivity in the VHF range, the small number of stations and the limited range, the models again returned the viewing range of short waves. The model circuit has been reworked, new 1GD-28 loudspeakers have been applied to the speakers, many of the model's parameters have become compliant with GOST receivers of the 2nd class. The appearance, dimensions and weight of the radiograms, with minor exceptions to the false panel, remained virtually unchanged. The price for the radiol "Promin-2" was 69 rubles.