<!doctype html public "-//W3C//DTD W3 HTML//EN"> <html><head><style type="text/css"></style><title>Re: My most heartfelt thanks, BUT........( new Yamaha w/bo</title></head><body> <div>At 9:50 PM +0200 4/13/04, Richard Brekne wrote:</div> <blockquote type="cite" cite>... 3.  Something is impeding the jack travel at the bottom of the keystroke.</blockquote> <div><br></div> <div>Ric,</div> <div><br></div> <div>One thing is for certain:</div> <div>If this fellow can just take care of just one note, C88, as he said it is doing it to, the mystery will be resolved.</div> <div><br></div> <div>Setting aside for the moment that the action has been damaged from a fall, or has been tampered with, or has had the geometry off from the get-go, I'm betting with "something is impeding" something, that's for certain.</div> <div><br></div> <div>That<b> 'something'</b> could be:</div> <div>1) the keyarm travel itself</div> <div>(easing bushing/balance rail hole [like André mentioned], foreign object)</div> <div>2) could be the wippen travel</div> <div>3) the hammer shank, butt, spring travel</div> <div>4) the jack lever, spring travel</div> <div>5) the center pinning of the flanges</div> <div><br></div> <div>With any reasonable let-off/key height-dip/hammer distance to strings/etc. regulation even close to specs, and undue friction eliminated, C88 is going to work just fine.</div> <div><br></div> <div>So the question is: Gordon, have you actually checked and adjusted each of these items as necessary for the one note, C88, to eliminate friction and regulation as being the cause of this bobbling?</div> <div><br></div> <div>While you, or anyone else, including myself, may have lots of years' experience, that doesn't negate the possibility of overlooking a fundamental thing.</div> <div><br></div> <div>Sincerely,</div> <div><br></div> <div>Keith</div> <x-sigsep><pre>-- </pre></x-sigsep> <div>Keith McGavern<br> Registered Piano Technician<br> Oklahoma Chapter 731<br> Piano Technicians Guild<br> USA<br> </div> </body> </html>