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Voltage stabilizer USN-200 "Mayak" was produced presumably since 1970. Universal stabilizer is designed to power TVs or other household radio equipment that consumes no more than 200 watts of power from an AC or 127 or 220 volt network. Output stabilized voltage is 220 V. The operating voltage range is 0.7 ... 1.2% of the nominal. The power consumed by the stabilizer 45 watts.