Mixing tube brands

no not power tubes

asking for trouble if you do that

@jjss49

 I beg to differ!

With power tubes, you can swap different brands of the same tube. (For example, 6L6 tubes from different manufacturers.) But do not swap different types of power tubes unless you are absolutely sure you know what you are doing — damage may result.

If you do try that make sure that you re-bias your tubes so that they at least match in that respect. If you can't do that don't try. Even then I wouldn't do it.

Personally speaking I generally select matched power tubes of my choice based on SQ (not so much power ratings) and make more subtle changes to their tone by selection of small tubes.

Your power output tubes (and small signal pre-amp and power amp input & driver stage tubes) had better match in electrical characteristics (gain, mu, etc.). If they don't, your electronics will create more distortion than if they do. Read up on how a tube circuit operates.

I would call Uncle Kevin at Upscale and see what he thinks.