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The Alpinist RP-221 portable radio receiver has been produced by the Voronezh PO Polyus since the beginning of 1990.
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The radio receiver is a 2-band DV and SV superheterodyne of a portable type of the 2nd group of complexity with power supply from batteries or an electrical network of 220 V through an external power supply unit.
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Technical parameters: The sensitivity of the radio receiver to the internal magnetic antenna in the range of DV 1.5, SV 0.7 mV / m.
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Selectivity not less than 30 dB.
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Rated output power 400, maximum 750 mW.
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The range of reproducible sound frequencies is 200 ... 3550 Hz.
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Power supply from 4 elements of A-343 type.
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Dimensions of the radio receiver 230x56x142 mm, weight 0.85 kg.
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The Alpinist RP-221 radio receiver is an absolute copy of the Alpinist-321 serial radio receiver of the third complexity group, which has been produced since 1986.
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