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Portable VHF-FM radio "Bulletin-401" since 1988 produced the Kursk plant "Mayak". Radio "Herald-401" was created on the basis of the radio "Iren-401" and except for the design, weight and dimensions are similar to it. The receiver is designed to receive broadcasting stations in the VHF band 65.8 ... 74 MHz. The sensitivity of the receiver is 18 ÂµV. Single-signal selectivity of 30 dB. Frequency range 450 ... 3150 Hz. Rated output power 70 mW. Power - battery type "Krona". Quiescent current 23 mA. Dimensions of the receiver 120x70x31 mm. Weight with food 230 gr. Receiver "Bulletin RP-301" manufactured since 1992 according to the electrical circuit and design does not differ from 401 models. A higher class model is assigned due to falling consumer demand and the influx of Chinese radio in the country. In some batches of 2 radio receivers, the KR-198HT4-A chip (transistor assembly) is replaced by transistors.