weird tunning issue

Paulius Volkovas

Well the issues with intonation is still here, but now its different. I have high e and low e intonated ok, but then my a and d strings are flat af 12 fret. I can move my bridge to better intonate a and d strings , but then low e gets sharp.

Al Watsky

Thats kind of just what happens.
Also check the open string and the first fret for sharpness at the first fret.
If the first fret is OK then at least your not chasing your tail and you set the bridge so that the low e is slightly sharp and the others are OK. In a few days of playing everything gets flatter and the Lo E won't sound as out of tune.
You will eventually find a spot that works .
Strings break in.
They start off sharp then settle in pitch.
Take notice of the changes and learn to live with them.

HarryR

Hi, I just wanted to throw my 2 cents into this discussion. I recently had a similar problem with a guitar I recently made. When the low E string was in tune open and at the 12th fret the G at the 3rd fret was sharp. I mean way sharp, between 5 and 10 cents according to the Snark. This made no sense to me because as I went up the F.B. other notes appeared to be in tune. In addition, going across the F.B. at the 3rd fret the other strings showed no tendency for sharpness. I spent several days scratching my head over this with a guitar maker who has way more experience with fretwork than I. We tried many things including string height at both ends, the crown of the 0 fret, relief of the neck and just about anything that seemed possible. I'm happy to say that the problem is fixed and what we discovered was that the compensation angle I put into my Bridge {homemade] was too steep. Over the years I have made a half dozen or so bridges for these guitars and I've never been too scientific about the angle, but this time I apparently got the angle too steep. I was unhappy with the bridge for other reasons and had decided to make a new one, this time with a more conventional offset [about 3/16] . The guitar plays in tune now but I can't say I understand why the 3rd fret [G] was the only offending note. I suspect it may have something to do with the Tempered Tuning of guitars and guitar frets but if anyone out there has a reasonable explanation or theory I'd be interested. Harry

Paulius Volkovas

I discovered that my Pattenote does not like D'addario gypsy strings. I put the Argentines and it intonates way better. Not perfect though, but a lot better.