Sorry, this page is not translated yet. Automatic translation used.
Since 1930, the low-frequency amplifier VUP-30 has manufactured plant No. 2 of the NKPT. The amplifier is designed to work on small radio broadcasting nodes for serving up to 300 subscriber radio points. To swing the amplifier up to 30 W using a pre-amplifier "UP-3" and since 1931 "UP-3-H".