I agree with you Will that setting action spread by jack position is not very definitive - who knows if the jacks were optimally placed originally (or with wear). However, don't trust the designer or factory either!!! Good place to start, for sure, but best to evaluate independantly. Having said that, I've done a number of bracket jobs and using YC's date designation for the two spreads has worked just fine for me. Terry Farrell ----- Original Message ----- From: Will Truitt The knuckle core lines up and forms a straight line with the back of the jack at 47 mm blow with the spread value of 112.5 mm. With all due respect, I would not choose to set action spread by your method. I believe that should be an absolute value as determined by the action designer, which the factory and us technicians should set as accurately as possible by measurement and/or jig. The only question for me is which of the two values given by YC it should be. The owner has not played the piano for several years and recently moved to the area. It is unclear as to how much the action was bastardized by another tech. Will -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/pianotech_ptg.org/attachments/20090128/4cb2675f/attachment.html>
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