Originally posted by Dr_simon
Hey Oldpunker (cool name !)
Tubes do where out and if you change them you may want to consider re-biasing them. I don’t know a lot about this however there are people at this site who do. Lordofthestrings is probably a good bet. This may do wonders for the tone of your amp. I had a friend who changed the valves on his JCM900, he nearly blew all of our heads up ! !

Thanks, it's been my internet screen name for years. Yeah I read about biasing I guess if the tubes arent matched that it will sound like kaka. I'm so new to tube amps cos I've been a solid state junky my whole life but I think I have been awakened to a whole new world here.