Hey guys, I was just wondering if a pre-amp or a power tube could be removed with the idea of lowering the output without any harm to the amp head???

I've got a B-52 AT-100 amp head, but in general I was wondering if it can be done or is this a major no-no.

Thanks, I appreciate any constructive comments.
I don't think taking out a pre-amp valve would make any difference. If you removed two of the power-amp valves (assuming there are four) then that can work in some amps, but not all and it is not something I would advise. You'd still have a lot of power, though, so if you're looking to get a saturated power-amp sound, you'd be better off with an attenuator, to be honest.
you can take out a power tube or two and lower the output
Fender American Standard Telecaster
Martin DC-16RE Premium

Fender Snakeskin Champ 12
you have to do them in the correct pattern

theres a guide for this for the Laney VC30 on the first page of the laney thread. check that out of ask the guys if it'd work on your amp
Get off this damn forum and play your damn guitar.
If you take out a preamp tube it probably wont work. You need to get the info on your amp not all amps can do the pull 2 tubes mod. And it wont work if there is only 2 power tubes.