I have just completed a fretted build, with a 23 inch scale, but cannot eliminate buzz unless I use, in my mind, a ridiculously high bridge. My CBG has a break angle, about 1-2 degrees, an M6 bolt as the nut giving me a height of approx 1mm at the first fret. However at the 12 fret it's almost 6mm, with the only bridge that doesn't produce buzzing. After fretting the neck I checked with a solid straight edge and was surprised that there were no low spots. I also checked with a small edge and found no rocking anywhere along the fretboard. However, after stringing, with a balanced set of strings, and tuning, fretting above the 7th fret produced buzzing, particularly, but not solely, on the low string. I removed the strings and went through the process of levelling, dressing and polishing the frets. After restringing it wasn't any better. The fretboard is a piece of sapele glued onto a birch neck. What am I doing wrong, as it's driving me crazy.
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Hi, to add to Brian's suggestions. Your string highlights seem high. An ideal bridge height I aim for is 1/2" to 5/8" this gives a good break angle and downward pressure on the bridge to eliminate buzzing there.
Do you have grooves in the bridge? Wrong size?
Is the string too light for that scale? Too much movement.
Did you check the neck level with strings at tension?
I have also found a bad string can give more flex than needed, loose winding, and cause buzzing.
Also a loose fret can look good when tested but pop up when neck under string tension.
Just a few ideas to consider.
cheers Taff
Usually if it's not the frets, then it's either a truss rod adjustment or a faulty nut/bridge slot? But if it's a cbg, there's probably no truss rod, so take into fact that it may be the way the string's contacting the nut & bridge that's causing it or if there's any bow in the neck, that would also cause buzzing?