Retubed my amp and.....
Is that why I'm getting the popping? Naughty penis!!!!!!
I have to just throw a switch for the bias. I went back to EL34s from 6L6s.
There was an old set of tubes that had only an hour on them so I threw 'em in. No more popping. Maybe one of the tubes were bad? They were matched so who knows WTF happened.