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Since 1931, the low-frequency amplifier UP-200 has manufactured plant No. 2 of the NKPT. The UP-200 amplifier (analogue of the VUP-30 amplifier) "‹"‹is intended for high-power radio broadcasting nodes. The amplifier has a nominal output power of 200 W and is swung to such power by an amplifier of the type "UP-3N".