The Mysterious Hamilton

[Newton Hunt]

Flat soundboard.  Use a thread along side the longest rib to see
how much crown there is or if there is indeed a rolled bridge where
you will have crown at one end but negative crown on the other
end.  A gap in the middle between thread and board indicated
positive crown.  With a CC system 1/16" gap is sufficient.

		Newton

Staccatomusic@cs.com wrote:
> 
> I have a Baldwin Hamilton that I have been tuning for a while and it never
> seems to hold tune no matter how many passes I always find the center moving
> up or down 4-6 cents before IM done. Yes, I tried tightening the plate
> checked for a bad pins, etc., cannot seem to locate the problem. Is this a
> bridge roll? The piano has a climate control in it and so I dot suspect the
> climate. Any thoughts?