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Since 1979, the portable radio receiver Russia-304 has been producing the Chelyabinsk Radio Factory. The release of the radio "Russia-304" is timed to the "Olympics-80". The electrical circuit and design of the receiver does not differ from the receivers "Russia-301" and "Russia-303". The Russia-304 portable class 3 superheterodyne radio receiver, assembled on 8 transistors and 2 diodes, is designed to receive radio stations from AM in the DV and CB bands to the built-in magnetic antenna, and in KV-1 and KV-2 to a telescopic antenna. The main characteristics of HG: The range of received frequencies: LW 150 ... 405 kHz; MW 525 ... 1605 kHz; HF-1 9.5 ... 12.1 MHz, HF-2 3.95 ... 7.3 MHz. IF - 465 kHz. Maximum sensitivity with an output power of 5 mW: on a DV of 500 Î¼V / m; MW 200 ÂµV / m; KB 50 ÂµV. Real sensitivity: on DV 1.5 mV / m; MW 0.7 mV / m; KB 100 ÂµV. The selectivity on the adjacent channel is 46 dB, on the mirror: on DV 36 dB; MW 30 dB; KB 14 dB. AGC action: when the input signal changes by 26 dB, the change in output is 6 dB. Rated output power 100 mW, maximum 150 mW. The band of reproduced sound frequencies 315 ... 3550 Hz. The average sound pressure of 0.25 Pa. Power - 4 elements of A-316. Quiescent current 10 mA. The performance of the receiver is maintained when the supply voltage drops to 3.5 V. The receiver dimensions are 215x125x47 mm. Weight 1 kg.