Ok so it doesnt have to do with Bass amps but its worth a shot. A friend gave me some old tubes he had laying around. 2 6v6s, 3 12ax7s, and a 12au7. now for my question I have a fender blues deville that takes 3 12ax7s and 2 6L6s running at 60 watts would I be able to use the 6v6s in place of the 6l6s? Would the 12AU7 work for the main drive tube? Why or why not? anything you would like to add?