At 11:09 PM 06/09/2000 -0400, you wrote: >In a message dated 6/09/2000 8:03:14 AM, Jon wrote: > ><<If you change the time the grand damper lifts without changing key dip, the >key end lifter >felt height ends up at the same height, so the damper is lifted to the same >height.>> > >Jon; > Y'all needs to rethunk dis here thing guy. :-) While it may be true of the >underlever...is it needfully true of the "damper"? >Jim Bryant (FL) Jim, You're right. I had my attention focused on the underlever. A damper which is adjusted to lift sooner will have a 'longer' wire extension and will be higher than a 'short' one adjusted to lift later. Underlever same height, wire different length. I could not see the forest for the trees. It was just too obvious for me to notice :-) That was a poor analogy to the motion of the jack and wippen in relation to a change in knuckle placement on the shank. Now that you have me second-guessing what I have said, let me rehash my remarks: >So by delaying the jack to letoff button contact time, the jack will still end up in the >same juxtaposition to the knuckle because the wippen is still being moved through >the same distance. Although I have not taken exact measurements of the 'jack location at check-in'; ei: removing the stop felt and marking the position of the jack on the repetition lever then changing the shank for a different knuckle execution and comparing the results. What I have noticed is that by changing to a different knuckle radius, the jack (which was too far away from the knuckle) did not end up any closer to the knuckle at check-in but only by moving the capstan was any significant alteration accomplished. There could/must be some slight difference caused by the lever action of the jack with letoff timing when a different knuckle is introduced, I'll make that measurement next week when I get into another rewhatever. I'm still working this up as I go along. My objective in all this is to have the jack remain close (real close) to the knuckle when the key is fully depressed. This has minimized after touch and aids in repetition since the jack has less travel. Thanks for catching my oversight, I hope everything else makes sense and I'm going in the right direction but it has produced some nice playing actions. Regards, Jon Page, piano technician Harwich Port, Cape Cod, Mass. mailto:jonpage@mediaone.net ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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