If the old bend actually straightens out and the new bend isn't the original bend when the piano was once at pitch and has also not really straightened out. Although I can see how this could be a factor and we did touch on this a bit. One thing I have noticed, however. I'm sure we've all seen a string that got kinked somewhere in the middle during, say, the stringing process and that kink never seems to really straighten out. David Love www.davidlovepianos.com -----Original Message----- From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf Of Terry Farrell Sent: Sunday, August 30, 2009 2:32 AM To: pianotech at ptg.org Subject: Re: [pianotech] PR follow up I would suggest that at least in the case of a large pitch adjustment, perhaps longer than a new string - perhaps - maybe. The new string only has one adjustment to make at each bearing point - the older string has the new bend to make and the old one to straighten out. I do agree with you about how much effect this may have. Terry Farrell On Aug 30, 2009, at 12:47 AM, Israel Stein wrote: > > SNIP > > But there is another factor here that everyone seems to be ignoring > - and that is the "memory" of the wire - the same factor that cause > instability in a newly installed string. At least in a severe pitch > raise or drop, what happens is that the section of the wire that was > bent around a bearing point has now moved away from the bearing > point and is expected to be straight. And a new section of the wire > that has been straight is now bending around a bearing point. It > will take some time for those segments of the wire to either become > completely straight or to fully bend around the bearing point - just > like a newly installed string. Perhaps less time than a new string - > but nevertheless, some time. I am not going to speculate as to how > long or how much of a pitch change would bring this into play. > SNIP
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