the bias adjustment sorted it a bit, the big problem was I forgot I used to have a eq in the fx loop, set that back up n its rocking hard, that extra gain sure makes these amps shine. ;-)

thanks guys, got the new pre tubes in, working again, but with a lot less volume. I will bias it tonight as I put new el34s in as well, live isn't often easy.

Hi, a couple of weeks ago my ma100 head died, no noticeable pops or anything. power valves all looked pretty burned around the top, pre valves showed no signs of heat. got 4 new matched el34b tung sols. no vol still. checked the valves 3rd el34 looked burned around the top again. fuses still good, I...