03-09-2014, 04:57 PM
Yes, one of the output tubes might be gassy, which causes it to conduct more as it warms up. The fact that the distortion switches polarity when you reverse the output tubes seems to confirm this.
You could also try switching the 6SH7 tubes just to eliminate them as a cause.
You could also try switching the 6SH7 tubes just to eliminate them as a cause.
