Vacuum tube amplifiers just won’t go away. I am speaking more of audio vacuum tube amps than I am of microwave amps like magnetrons, klystrons, TWTs and the like. Most other audio gear is solid state so why are there still vacuum tube amps? My grandson asked me that recently and it was hard to explain this phenomenon. What I basically said is that vacuum tubes amps sound better than solid state amps, to some people. I had no way to follow up or demo this effect.
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