I wasn't getting any responses in the tube thread so I decided to post a thread...

Recently my mesa's preamp tubes went kaput.

I really want to try out different tubes other than the standard Mesa 6L6's and 12AX7's. The F-100 head I have does not have any way to bias the tubes without taking it apart.

If I wanted to install 4 Tung-SOL 12AX7's and E-H 6L6's, as long as I buy them in a matched set, I wouldn't have anything to worry about right? Since the Mesa 6L6's are "lifeless" I really want to up my tone. Would buying non Mesa tubes be bad for my amp, the warranty is already gone so that's not a concern, but having tubes that aren't made for Mesa, are there any issues or reasons why this would be a bad idea?
Major of 7 String Legion 7 > 6

Carvin DC747
Ibanez RG2228
Schecter Avenger Custom Shop
and my baby....
Gibson Explorer Studio
No, you can put any tubes in there you want, but you will prob have to take it to an amp place and get the tubes rebiased...

which just means (I think) that they check the power of the tubes into your amp to make sure its correct so your amp isnt trying to hard or not enough... or something like that, lol.
Faded Gibson SG Special - Black ice mod
Seymour Duncan SH-5 in bridge
B-52 AT 112
Ted Weber Mass100 attenuator
EHX Small Clone
EHX Metal Muff
DIY Modded tubescreamer
Dunlop 535Q Wah
Wax Potting tutorial