Hi all. I've been having this problem with one of my amps for a while now - when I set the clean channel up for very mild breakup, I get this unpleasant fuzzy sound when I let a note or chord ring out. It's hard to describe, but after the intensity of the signal dies down enough that the note is just ringing clean, there's still this secondary fuzz/breakup sound rippling through the background. It eventually dies off as the note continues to decay, but its definitely there. I'm hoping someone else has experienced this and knows what im talking about, it's really hard to describe! I've switched out the V1 preamp tube from a JJ to Tung Sol RI 12ax7, and that helped, so I think this might be a tube thing. Wondering if anyone has had this problem and how they fixed, maybe a specific tube type, or something else altogether?