Tuning stability

[David Ilvedson]

I got a catalog from Pianotek with a string stretching/seating tool.   It sits on the keybed and pushes up from below.   I've seen it before but theirs is really nice.   

David I.



----- Original message ---------------------------------------->
From: Fred Sturm <fssturm@unm.edu>
To: College and University Technicians <caut@ptg.org>
Received: Wed, 31 Mar 2004 12:44:43 -0700
Subject: RE: Tuning stability

>--On Monday, March 29, 2004 11:09 PM +0200 Isaac OLEG <oleg-i@noos.fr> 
>wrote:

>> Fred, I believe that if you warm the string rubbing them with a piece
>> of wood , you'll get a very fast stabilisation, and you can avoid to
>> bend them, bend can take place later I guess, is not it better?

>Isaac,
>	My experience tells me that I should make the positive bends in the wire 
>soon after installing it for two reasons:
>	First, this will stabilize pitch faster. My sense is that the process of 
>the wire "making the bends itself" over time is a very large proportion of 
>the cause for pitch drop of new wire. On new pianos from the factory, for 
>instance, I find that heavy pounding can drop pitch by 50 cents or more. 
>Not true of pianos I have restrung and made those positive bends. I 
>interpret that to mean that the pounding is largely helping to create those 
>bends.
>	Second, the tone becomes much clearer, with a less "fuzzy" pitch. This 
>difference is pretty readily apparent. Pull to pitch without making bends 
>and listen. Make bends and pull to pitch, and listen.
>	I do like to make sure pitch is as close to standard as possible when 
>making the bends. Hence, 25 cents sharp before making the bends from bridge 
>to hitch pin. Making the bends lowers pitch by 25 cents or a bit more. So I 
>pull sharp again before making the front bends, which leaves the string 
>close to pitch.
>Regards,
>Fred Sturm
>University of New Mexico





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