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Since 1974, the portable radio receiver Russia-303 has been produced by the Chelyabinsk PO Polet. The portable radio receiver of the 3rd class of the superheterodyne type "Russia-303" is assembled on 8 transistors and 2 diodes. It is designed to receive radio stations with AM modulation, in the ranges of DV, SV on the internal magnetic antenna and in the KB subbands on the telescopic. The frequency ranges are: DV - 150 ... 408 kHz, CB - 525 ... 1605 kHz, HF-1 9.5 ... 12.1 MHz, HF-2 3.95 ... 7.3 MHz. The intermediate frequency is 465 kHz. The sensitivity in the range of DV - 1.5 mV / m, SV - 0.7 mV / m, KB - 100 ÂµV. The selectivity of the neighboring channel in the Far East and CB is not less than 46 dB. Selectivity for the image channel in the range of DV 26 dB, CB 30 dB, KB 14 dB. AGC action: when the input signal changes by 26 dB, the output voltage changes by 6 dB. Nominal output power not less than 100 mW. The band of reproduced sound frequencies is 300 ... 3550 Hz. The average sound pressure of 0.25 Pa. Food - 4 elements 316. Dimensions of the model 215x125x47 mm, weight 1 kg. Price 59 rubles. The radio receiver was produced for more than 15 years, was repeatedly upgraded by replacing elements and components with more modern ones, the appearance of the receiver was also changed several times.