Does anybody know what kind of tubes the Fortin NATAS uses to get the insane amounts of gain it has? I'm wanting to find out and put the same tubes in a ValveKing 100 head and see if I might get a similar tone.
Exactly. Mesa SELLS tubes with their name on them, but they don't make them. The tubes they sell are the exact same tubes you can buy from any tube seller. If you wanted to, you could have the tube makers put your name on tubes and sell them.