On 12/7/2010 5:41 PM, Kent Swafford wrote: > I was tuning a D at a local church. It had a dreadful sympathetic > noise on one note in the mid-range. I took a look underneath to check > for separating ribs and the attached photo shows what I found. This > is looking above the belly rail at the front of the soundboard. This > was difficult to photograph and I never did get the other side in > focus, but the crack goes all the way through. I don't much > understand how this could happen, but there it is. Damage that opened > up over time? Anyone here have experience with similar rib damage. I've seen it, usually accompanied by 3° treble bearing. I figured it was an undetected crack when the board was built, compounded by asking a lot structurally of sugar pine ribs. > I think it will be an easy fix, allowing for the fact that this is > above the belly rail. But of course, I won't know for sure this is > the source of the noise until after it is fixed. Pre-test with a wedge, to see if the noise goes away before committing to a full chiropractic episode. If it doesn't, life just got tougher. Ron N
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