Do the tubes need to cool before I turn it back on again?

[6v6Pin1]

Do I need to wait when turning a tube amp on and off while I am trying some changes? Do the tubes need to cool down before I turn the amp back on? It makes me nervous like a tube will be damaged if I power cycle the amp too quickly but maybe I just made that up in my head.
Thanks.

[sluckey]

no

[Willabe]

Do I need to wait when turning a tube amp on and off while I am trying some changes? Do the tubes need to cool down before I turn the amp back on? It makes me nervous like a tube will be damaged if I power cycle the amp too quickly but maybe I just made that up in my head.

Sluckey already answered you but you do need to make sure the B+ filter caps are drained of their DCV before you poke around in the amps guts. If their not drained you'll get shocked, maybe badly, can even kill you. 

[EL34]

Does your car engine have to cool down before you start it again? 

[6v6Pin1]

This is good news. I enjoy being impatient. Thanks again.