Can I use E34Ls or 7581A tubes in my Mesa Mark III?

[Snow006]

So long as their within the proper range for current draw obviously?

 

[Markedman]

Is it "simul-class"? If it is, you can use el34's in the outer sockets.

 

[treedroppings]

I had a simul-class Mark3, and 15 watts on 2xEL34 was louder than a 100 watt Infinity stereo. :lol: Now I have a mark I re-issue, it takes 4xEl34s, 4x6L6s, or 4x6V6s. I want to try the 6v6s when I get the moola!

 

[Snow006]

Yes it is simul-class Markedman. I run EL34s currently but I was tempted to try E34Ls for more power but I've heard other amps having problems with them and didn't want to take the chance.