[Amps] Tubes vs. Solid State

[Pete Smith N4ZR]

Regarding vapor phase cooling, I had to smile when I read Dick's 
suggestion to evacuate the cooling system to 1 PSIA, lowering the 
boiling point to 100F.  Seems like this would change everything - at the 
cost of additional complexity, of course.  Whoever would have thought we 
might see ham amps with vacuum pumps?

73, Pete N4ZR
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