I agree with Zeno. Backrail cloth in good condition is not only important for noise, but for key leveling, and hence good regulation. Big win for small cost. --Cy-- Cy Shuster, RPT Albuquerque, NM www.shusterpiano.com On Feb 28, 2010, at 8:27 PM, Gene Nelson wrote: > Having a difficult time reducing hammer return noise > on a piano with new Tokiwa whips & shanks, new hammers, key > capstans, back checks, key pins and bushings, front and balance > rail punchings, key buttons, and key end felt. > Key frame is properly bedded. > Action is regulated. > All action frame joints and screws are solid and tight. > All action parts screws are tight. > All centers are at optimal friction with no wobble. > All hammer glue joints are solid. > All whippen glue joints are solid. > Hammer rest rail has new felt, is adjusted at correct height and > nuts are tight. > Key stop rail has new felt and is adjusted for minimal up key > movement. > I have checked the knuckles - the core is firm dense felt and a > needle easily goes in from the side. Buckskin is not too tight over > cores. > I have had minimal to zero results using my sugar coater on the > knuckle buck skin. > I can depress the key about 2mm, release it and give a slightly > woody clunk upon return. > Noise is a bit louder when hammer falls after releasing from check. > Happens on the bench and when secured in the action cavity. > It is noticeable when playing especially in the upper treble section > with lid closed but the noise exists in the lower parts as well but > not quite so noticeable when playing. > > Any ideas would be helpful. > At some point I should just give up and accept it as normal action > noise? > Thanks for your thoughts. > Gene > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/pianotech.php/attachments/20100228/26a860aa/attachment-0001.htm>
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