Hi all, I decided to check the intonation on my guitar and I found that when I tuned the low E string, the G (3rd fret) was slightly sharp (about 8 cents) but at the 12th fret it was 20 cents flat!! Any ideas why this is, and how solve it??
Thanks
http://img517.imageshack.us/img517/5328/guitarsig6bw.gifWhat kind of guitar is it?
What kind of adjustment screws, if any, does it have on the bridge?
If it has screws on the front or back of the bridge they are for adjusting the intonation. The documentation that came with the guitar should tell you how to adjust the intonation if it is adjustable.
Take a look at the "basic setup" page on my site linked below to get an idea how it is done.
That's a pretty big difference.
20 cents would require a saddle move of over 1/8" (exact amount will vary depending on your scale length).
The first thing I'd do, though, is change strings. Old strings throw off intonation - the dirt on the strings affects mass, and therefore tuning.
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