I love choosing a 100w nmv plexi amp model and diming it with plenty of supply sag , tube bias & a variac but I've recently noticed that with my SSS Strat, particularly on the neck pickup I'm getting some kind of ghost notes / dissonant overtone when playing notes around the 9th - 15th fret particularly on the D and G strings. It sounds like a bad harmoniser or ring mod in the background behind the main note (it sounds like a like a slightly flat major 3rd).
What parameters should I play about with to try and reduce this WHILE keeping as much greasy saggy brown goodness as possible ?? I heard the easiest way is to change from AC to DC power type but just out of curiosity and for future reference I would like to know what I have done with my settings to have caused the virtual plexi to start 'ghosting' excessiveley, particularly with single coils.
What parameters should I play about with to try and reduce this WHILE keeping as much greasy saggy brown goodness as possible ?? I heard the easiest way is to change from AC to DC power type but just out of curiosity and for future reference I would like to know what I have done with my settings to have caused the virtual plexi to start 'ghosting' excessiveley, particularly with single coils.