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Portable radio station "Nedra-P" was produced from I-kv 1964 by the Omsk Kozitsky instrument-making plant. The transistor radio station "Nedra-P" replaced the tube radio station Nedra-1. Radio station "Nedra-P" works with the upper sideband in four fixed frequencies, index A, B, C, D. It provides a wireless linkless up to 50 kilometers. Communication with the radio station "Nedra-1" is impossible, since the old model works with the lower sideband. The operating frequencies of the new radio station are also located in the range of 160 meters. The maximum power developed in the antenna 0.4 watts. Receiver sensitivity 1 µV. The model is powered by 8 elements of the type "Saturn" or any direct current source with a voltage of 12 V. A set of eight batteries is enough to operate the radio station for 50 hours. Dimensions of the model are 285x190x129 mm. Its weight with batteries and whip antenna - 4 kg.