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UHF prefix "P-SK-D-5-1" from I-kv 1987 was produced by several factories of the country. The prefix "P-SK-D-5-1" is designed to work with TVs of any type and class for receiving TV programs in the UHF range without additional rework. In the zone of reliable reception of a television center or repeater on any of the UHF channels (channels 21 to 41), the set-top box receives television studio signals and converts them into signals of a meter range (channels 1 or 2 MW). As a receiving antenna, it is necessary to use a television antenna of decimeter range produced by the industry with the appropriate cable. The prefix "P-SK-D-5-1" was produced by several factories whose cities are easily identified by the name of the prefix: Rostov-Don, Zhiguli, Bryansk, Saratov ',' 'Dvina' ', Ruby' '... Main technical characteristics: The range of received frequencies is 470 ... 640 MHz. The prefix input is single-ended 75 ohm. Sensitivity not less than 70 mV. Power supply ~ 220 V. The power consumption is about 5 watts.