Patrick, I think that if you put bolster felt under the wippen leather and reset the lost motion afterward, I think you will find that the let off has returned to near where it should be. There is a dent where the jack hits all the time and that causes early let off after the capstans have been raised to remove lost motion. This is a guess. Has anyone tested it out? Warren Bonifield/Poulson wrote: > > List Members All: All right, I've got one for you. Why is it that on > some uprights the let-off distance increases as the action gets more and > more out of regulation? I have observed this phenomenon many times when > first being called to service a piano. Intuitively it would seem that as > the let-off puncning wears it gets thinner and allow the jack to trip > out with the hammer closer and closer to the strings. This I have seen > (blocking hammers) but I have also seen pianos with let-off distances at > 1/4 " and more, and the owner swears that the instrument has never been > regulated in recent memory. Is it possible that on all these pianos a > previous technician somewhere in the forgotten past has gone through and > adjusted let-off wider for some reason? Or am I a victim of > tuning-induced delusions? Patrick Poulson, RPT -- Home of the Humor List Warren D. Fisher fish@communique.net Registered Piano Technician Piano Technicians Guild New Orleans Chapter 701
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