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  #1  
Old 12-08-2019, 08:21 PM
artpayne artpayne is offline
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Default 3 string tuning problem

Some while ago I made a cigar box guitar for my grandson (who is a fairly accomplished guitarist). I enjoyed the experience so much I have made a few more. Generally speaking they play quite well but on all of them I have the same problem. When played high on the fingerboard they sound sharp, the higher on the board the sharper they get.
They are all tuned open G (G,D,G.)
They have adjustable bridges and I have tried various string heights etc. without success.
They are all 25.5" scale with 17 frets.
I use a WFret template for fret spacing and am confident they are all accurate to +/- half a mm.
Any help/suggestions would be greatly appreciated.
Cheers,
Art
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Old 12-08-2019, 08:25 PM
charles Tauber charles Tauber is offline
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Did you add extra vibrating string length for compensation? For that string length, you'd need to add about 1/8" to 3/16" extra beyond the scale length.

One way to see how much you need is to compare the pitch of the open string to the pitch of the 12th fretted note: one should be in tune an octave above the other. Each string will require its own exact amount of compensation to achieve that.
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  #3  
Old 12-09-2019, 11:30 PM
artpayne artpayne is offline
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Thanks for that. Have adjusted all strings. Not quite there yet but an improvement.
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