In this video I make an autopsy of a GU-50 power pentode and explain how does this vacuum tube work. GU-50 is a soviet copy of LS-50. It's a linear RF amplifier designed for radio transmitters up to 120 MHz and 50 W, but it was also used in TV sets and medical equipment. Nowadays it's used by audiophiles for audio amplifiers and also for vacuum tube tesla coils (VTTC).
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