Inner melody string flat by the 3rd fret
Instruments- discuss specific features, luthiers, instrument problems & questions
We have pulled a 1974 McSpadden kit dulcimer (standard, 28.5", 1.5", zero fret, four string) out of long term storage. My late father-in-law assembled it in 1974 and it was played a total of about 1 hour since then! I tuned it D-A-aa. The bass, middle and outer melody strings keep perfect pitch at all frets. There is no fret damage that I can see. The inner melody string can be tuned to match the outer when open but it is noticeably flat by the 3rd fret and gets worse up the neck. Having the zero fret I don't think the problem is at the nut end. I am going to replace the strings anyway but the originals were not stored in tension and look normal with no corrosion. What could cause this string to behave differently than the other three? Thanks!