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Since 1982, the portable radio receiver Russia-303-1 has produced the Chelyabinsk PO flight. The portable transistor radio receiver of the III group of complexity "Russia-303-1" was created on the basis of the serial model "Russia-303" and is not much different from it. KB ranges on a telescopic antenna. The power source 4 of the element 316. The current consumption, in the absence of a signal of 10 mA. Operational efficiency while reducing the supply voltage to 3.5 V. The duration of operation at an average volume of 50 hours from a fresh set of batteries. The receiver has a fine tuning regulator in the HF subbands, jacks for an outdoor antenna and a miniature telephone. Ranges: DV 150 ... 408 kHz, CB 525 ... 1605 kHz, KV1 9.5 ... 12.1 MHz, KV2 3.95 ... 7.3 MHz. IF 465 kHz. Sensitivity in the ranges of DV 1.5 mV / m, MW 0.7 mV / m, in both KB subranges 100 ÂµV. Selectivity of at least 46 dB. Rated output power of about 100 mW, maximum 150 mW. The band of reproduced sound frequencies is 300 ... 3550 Hz. The average sound pressure of 0.25 Pa. The dimensions of the radio receiver are 215x125x47 mm. Its weight is 1 kg.