by cheepaxes » Thu Sep 23, 2010 3:13 pm
If you have old strings on it, the first thing I would do is replace them.
I'd be more inclined to suspect the placement of the bridge than the tuners. What happens when you play a harmonic at the 12th fret and compare to fretting at the 12th fret? Try that. If the fretted notes are sharp compared to the harmonic, carefully slide the bridge toward the tailpiece. If they're flat, carefullly slide the bridge toward the nut. Retune after each time you move the bridge and compare again. Keep doing that until the notes are tuned the same for the harmonic and the fretted notes. Do this for both high and low E strings. When those are correct, hopefully all other strings will be in tune. Then try playing the guitar. Does it seem seem out of tune when all the open strings are in tune?
If you get it in tune, but the strings slip and go out of tune, *then* I would suspect the tuners.
Let us know how that works.
-Scott