4-125A, vacuum tube do's and donts

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Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>" <Fucian-at-aol-dot-com>

Hi all,
I have gotten my 2 4-125As and am about ready to begin my first VTTC!I dont 
know much about vacuum tubes so I want to ask yall what are the things NOT to 
do to a vacuum tube that maybe yall have done while experimenting.I know my 
tubes can handle 125watts apiece and 3kv plate voltage.

Just what are the key thingsNEVER to do to a tube.(aside from the obvious 
smashing,dropping ect.)

Thanks,
Matt