A string's treatment/ Isaac

[Michael Spalding]

Cy,

I think that what is often referred to as "string stretching" is actually
string bending.  Every place that the string changes directions (becket,
pressure bar or duplex, v-bar, bridge pins, aliquot, hitch pin), the string
needs to conform as closely as possible to the surface it is bending
around.  To the extent that we can tighten these bends during stringing,
the initial tunings will be less unstable.  Even in the best scenario,
these bends continue to "improve" for several tunings/years, until they
eventually settle down and are less of a factor than all the other things
which cause pianos to go out of tune.

Mike Spalding RPT 



> [Original Message]
> From: Cy Shuster <charter1400@charter.net>
> To: Pianotech <pianotech@ptg.org>
> Date: 7/12/2003 9:58:19 AM
> Subject: Re: A string's treatment/ Isaac
>
> As a newbie, that's certainly a misconception I've bought into.  I don't
> know if I can even come up with other potential factors.   Wood
deformation
> of bridge and soundboard?  Tuning pin torque changing for some reason?
> (There was some mention of torque measurements over time in the pin
driving
> fluid discussion).  Does the plate even respond to initial loads?  What
have
> you found?  Interesting topic.
>
> --Cy Shuster--
> Rochester, MN
>
> ----- Original Message -----
> From: "Ron Nossaman" <RNossaman@cox.net>
>
> <snip>
> > Also, inherent in this process is the assumption that continually
> > stretching strings is the principal reason for the need for more
> > tunings when a piano is new. That is, again, not necessarily the case.
>
>
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