String gauge and intonation
Instruments- discuss specific features, luthiers, instrument problems & questions
Hey folks I was hoping to get some clarification about how string gauge affects intonation. I have noticed that an unwound middle string needs to be compensated about 1/16th of an inch longer than a wound middle string. If I don't compensate the middle slot differently than the others, it can often be up to 15 cents sharp at the octave, when properly tuned.
I remember hearing in passing a long time ago that wound strings need to be intonated to compensate for their core diameter and not their wound diameter. Can anyone verify this?
And if so, does anyone know what size core corresponds to certain gauges of wound string? For example, what is the core gauge of a .18 and a .24 string that are wound? Maybe I can use the digital calipers at my work and measure some cores.
I have noticed that in order to correctly compensate for my middle strings, the bridge needs to be shaped differently depending on whether the string is wound or not. Is this a common issue? and is there a better solution than just having two separate bridges with the two different compensations?
Thanks for any info, and sorry if the questions aren't asked very clearly,
Nate
updated by @nate: 03/05/24 12:41:54PM