[pianotech] PR follow up

[David Love]

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