Pitch Raising

[Stephen Airy]

--- Farrell <mfarrel2@tampabay.rr.com> wrote:
> OH, Joe, please be more specific!
> 
> > As for the "Stretch" factors, that others are
> advocating, YIKES! They must
> > like replacing strings. Some of those
> "over-shoots" are far in excess of
> the
> > normal sting breakage tolerances.
> 
> I never overshoot more than 25 cents (I usually keep
> it well below that).
> What kind of "over-shoots" are you referring to?
> It's obvious to me 25 cents
> max is typically within string breakage tolerances
> (on a string in good
> condition). But I wonder about string deformation.
> How much can one pull it
> up above pitch without doing something weird to it -
> deforming it in some
> way. Anyone have any kind of data on that - I
> realize it will vary with
> different string diameters, but maybe at least
> general info???
> 

I've broken about 5 strings so far in my Ricca, one in
the temperament while I was playing the piano and four
in the bass while I was tuning.  All broken strings
snapped when they were at or below pitch.  Do you guys
think there's a way to avoid breaking strings in the
future without replacing them?   Although the strings
are 88 years old, I don't have the money to do a full
restringing job.  (I've already replaced the lowest 2
bass strings and that took a good sized chunk out of
my wallet.)  I WOULD like to be able to keep the piano
tuned at 440.  (It was a half-step flat a year ago
when I got it and when I pulled it up I didn't break
any strings; the strings broke during subsequent
maintenance tunings.)

> Terry Farrell
> 
> ----- Original Message -----
> From: "Joseph Garrett" <joegarrett@earthlink.net>
> To: <pianotech@ptg.org>
> Sent: Tuesday, November 06, 2001 1:26 PM
> Subject: Pitch Raising
> 
> 
> > Bill Bremmer & List,
> > I've been following this "thread". Yes, Bill, if
> you use the pitch raising
> > program, as I outlined in the PTJ, Dec.1999, it is
> very possible to get
> > "Dead on", with just two passes on a 100cent pitch
> raise. If it doesn't
> > happen, then I would be looking very carefully at
> the overall structure of
> > the "victim piano". If the piano is solid, there
> should be no problem of
> > attaining pitch in two passes.
> > As for the "Stretch" factors, that others are
> advocating, YIKES! They must
> > like replacing strings. Some of those
> "over-shoots" are far in excess of
> the
> > normal sting breakage tolerances. My advice is:
> DON'T DO THAT!
> > Regards,
> > Joe Garrett, RPT, (Oregon)
> >
> 


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