Thanks for the replies. Of course, it is possible that something is wrong. That cannot be really known until I retube.
One thing is for sure, it won't be with 6550. I'll get two quads of JJ Blue Glass E34L. Because of my impatience, I was thinking of trying my quad of JJ KT88 in one channel just to see.
One thing is for sure, it won't be with 6550. I'll get two quads of JJ Blue Glass E34L. Because of my impatience, I was thinking of trying my quad of JJ KT88 in one channel just to see.