Verituner and Pitch Raises]

[Farrell]

I have absolutely no doubt that many (most?) pianos can have their strings
pulled more than a half-step sharp - maybe even more than a full step -
before they break. I played around with a hundred-year-old rusty piano in my
shop before de-stringing. Most strings would go up to two full steps sharp
before breaking! And obviously, we have all experience the piano that can't
even go to A440 pitch without having strings pop.

But at what point does the risk of permanent deformation arise? I'm certain
that it is largely dependant on the scale - some piano scales have strings
closer to their breaking strength than others - but is there some general
rule that covers most all pianos?

Terry Farrell

----- Original Message ----- 
From: "Hechler Family" <dahechler@charter.net>
To: "Pianotech" <pianotech@ptg.org>
Sent: Thursday, May 27, 2004 11:19 PM
Subject: Re: Verituner and Pitch Raises]


> I've done about 2 or 3 one-pass pr's that were about 150 cents with no
> problems and no broken strings. I know, maybe, it's because these pr's
> were done on old antique uprights (w/wo players) -with- the original
> strings. And still going strong. ;-)
>
> Duaine
>
> Farrell wrote:
>
> >But if the pitch raise is more than 100 cents (really more than maybe 60
> >cents), you need to do two pitch raises, otherwise you will be
overpulling
> >more than 25 cents (which, I think, is generally considered the most you
> >want to pull a string sharp without running risk of damaging the string).
> >
> >Terry Farrell
> >
> >----- Original Message ----- 
> >From: "Hechler Family" <dahechler@charter.net>
> >To: "pianotech" <pianotech@ptg.org>
> >Sent: Thursday, May 27, 2004 7:33 PM
> >Subject: [Fwd: RE: Verituner and Pitch Raises]
> >
> >
> >
> >
> >>I know nothing about Verituner but the Cybertuner has three ranges for
> >>pitch ranges - small _+_50c - medium _+_100c - large _+_200c
> >>
> >>Most of the time a pitch raise can be done in one pass unless there are
> >>weak/loose pins.
> >>
> >>-- 
> >>Duaine Hechler
> >>Piano, Player Piano, Organ, Pump Organ
> >>Tuning, Servicing & Rebuilding
> >>Associate Member of the Piano Technicians Guild
> >>Reed Organ Society Member
> >>St. Louis, MO 63034
> >>(314) 838-5587
> >>dahechler@charter.net
> >>
> >>_______________________________________________
> >>pianotech list info: https://www.moypiano.com/resources/#archives
> >>
> >>
> >>
> >
> >
> >_______________________________________________
> >pianotech list info: https://www.moypiano.com/resources/#archives
> >
> >
> >
>
> -- 
> Duaine Hechler
> Piano, Player Piano, Organ, Pump Organ
> Tuning, Servicing & Rebuilding
> Associate Member of the Piano Technicians Guild
> Reed Organ Society Member
> St. Louis, MO 63034
> (314) 838-5587
> dahechler@charter.net
>
> _______________________________________________
> pianotech list info: https://www.moypiano.com/resources/#archives