PRs climbing sharper

[Alan R. Barnard]

Aw, you guys complain about changes over a six month period. Shoot, I did an
experiment with my lil' old classical guitar and found that it will rise in
pitch 5 cents or more within 10 minutes of being tuned--apparently just from
the heat and humidity of my body as I hold and play it. It's not the
playing, per se, that does it either because that tends to flatten pitch, if
anything. ;-]

Alan Barnard
Pickin', Pluckin', Strummin', and Tune, Tune, Tuning in Salem, MO


----- Original Message -----
From: "Paul Chick (EarthLink)" <tune4@earthlink.net>
To: "Pianotech" <pianotech@ptg.org>
Sent: Wednesday, October 30, 2002 5:31 PM
Subject: Re: PRs climbing sharper


> Tom
> I've noticed this when the piano was pitch raised in winter with low
> humidity, and the summer's high humidity has caused it to go sharp.  The
> most noticible is tuning school pianos in late winter and then tuning them
> in August for the new school year.
>
> Paul Chick
> ----- Original Message -----
> From: <Tvak@aol.com>
> To: <pianotech@ptg.org>
> Sent: Tuesday, October 29, 2002 8:11 AM
> Subject: PRs climbing sharper
>
>
> > Here is something I've never seen mentioned in books or on the list but
is
> a
> > consistent phenomenon to my experience.  When I return to a piano which
> had a
> > big pitch raise, I find that the piano is sharper than where I left it.
> For
> > instance, yesterday, I returned to a piano that I raised 6 months ago
from
> > 100 cents flat to A438 and found it at A440.  You could explain that by
> > factoring in the summer humidity in this case, but I find this to be
true
> no
> > matter what time of year.  Tune it in the fall, come back in the spring
> > before the windows open up and it's still sharper than where it was
tuned
> to.
> >  This phenomenon is so consistent that I now tune really flat pianos to
> A438.
> >  Otherwise, I play tag with A440 and have to lower the pitch on my
return
> > visit.
> >
> > This only happens after big pitch raises, of 35 cents or more.  I use
RCT
> to
> > pitch raise; whether it takes two passes or one, either way, my last
pass
> is
> > on a piano that is very close to the target pitch level.
> >
> > Comments?
> >
> > Tom Sivak
> > _______________________________________________
> > pianotech list info: https://www.moypiano.com/resources/#archives
>
> _______________________________________________
> pianotech list info: https://www.moypiano.com/resources/#archives