Quote:
Choobus wrote
Quote:
logarithm wrote
And, Choobus, I have not put oil in a klystron or gyratron in almost twenty years. But you still can't beat tubes for overall power.
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True, but they are fucking expensive to maintain, and those bastard power supplies break all the time. I used to work on a 100 MeV linac at LLNL and the duty cycle betyween running and down for repair was about 1:5. A nice reliable solid state system is much more useful than a bastard beast that only works 20% of the time.
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Yeah, about the same as an easily-maintained fighter jet. The F-14 was something like 50 hours maintenance per hour of flight time, and the F-18 is about 15. But then for tubes, what do you expect, with ~ 80 kV and 10 amps input? SOB sat in a 400-gallon tank of oil for cooling...and if we had waveguide arcing (common, especially at 10^-9 Torr), the bitch threw it all into the biggest freakin' capacitor-inductor crowbar circuit you may have ever seen. It was two stories high. And, truth be known about it, solid state has come a LONG way. IIRC, Varian had gotten another of that particular gyratron tube cranked up to something like 360 kW. :O