I have a Peavey T-40 that I just put new set of medium Dean Markley sr 2000's on. The issue is that any fret above the 12th fret (or in that general range) has a funky "harmonic" undertone to it, sorta sounds like a chorus effect. My friend says it's picking up a vibration from the string below the fret and that my action is to low (I have it as low as the bridge will allow which puts me about 3/32 above the 12th fret). I think that's bull. I had a set of light stainless strings on it before and didn't have the issue. I think, if anything, the pickups are to close, but I don't how it would cause that problem. Anyone have an answer for me? Thanks.