Ron Koval wrote: > So you have a C6 and a C7 that both have the same symptoms. Yet, not all > C6's and C7's show the same, do they? Instead of a design flaw, is there a > possiblity of anything being loose, or stripped screws,... check all the way > down to the action bracket feet. I only see one of these, so I don't have > much background "feel" with these particular pianos. Can you see a > deflection in the rail by pressing down, or lifting up on the rail? Yep.. but lets hold ourselves to this one I have my hands on for now. I wont see the other instrument for a few weeks. If I reach in and lift up anywhere on the hammer rail inbetween brackets I can get the same drop in the hammers in that area. Blocking a hammer and pressing the key affects almost equally anywhere... only right at the brackets is there less movement in the rail. You can see it bow easily enough. Hammers drop very noticably until they hit the rest felt. I will see if I can measure the movement in the rail, but I would venture a guess of at 2 - 3 mm easily enough. > Can you > see it bow, or is there more motion than that? Can you get the same > symptoms close to the action brackets? See if you can measure/find what's > moving/bending before changing too much. > > Anybody familiar with Yamaha rail problems in certain years? > > Ron Koval > > But to the solution then.... the Yamahas have this peice of aluminum on the > front of the rail, perhaps thats not doing the job. I wonder if it could be > replaced with something a bit more heavy duty ? Anyone replaced a rail > before > because of this ? > > _________________________________________________________________ > MSN 8 helps eliminate e-mail viruses. Get 2 months FREE*. > http://join.msn.com/?page=features/virus > > _______________________________________________ > pianotech list info: https://www.moypiano.com/resources/#archives -- Richard Brekne RPT, N.P.T.F. UiB, Bergen, Norway mailto:rbrekne@broadpark.no http://home.broadpark.no/~rbrekne/ricmain.html http://www.hf.uib.no/grieg/personer/cv_RB.html
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