Joe:
"Thin spots" are "necking" of the string and lead quickly to breakage since necking happens only when one reaches to or beyond the elastic limit (Young's modulus) of the string. It's why I don't use wire rollers, too! Generally, one has to think in the range of 300 cents overpull to reach breakage (a minor 3rd). In my opinion, there is never any good reason to overpull strings by any more than 20-40 cents; even 100 cents is excessive.
Paul
-----Original Message-----
From: Joe And Penny Goss <imatunr at srvinet.com>
To: Pianotech List <pianotech at ptg.org>
Sent: Tue, 8 Apr 2008 5:13 pm
Subject: Re: sharp tuning
Hey Paul,
Only credit me with the Elastic line.
Me thinks it should have been stated ALMOST TO as
stretched to the point that the wire thins out in spots.
Like in the use of the wire roller. Thin spots on a
string will IMHO?result in?false beats on that wire.
Joe Goss RPT
Mother Goose Tools
imatunr at srvinet.com
www.mothergoosetools.com
----- Original Message -----
From:
paulrevenkojones at aol.com
To: pianotech at ptg.org
Sent: Tuesday, April 08, 2008 12:36
PM
Subject: Re: sharp tuning
Joe (and Wim):
BZZZZT!.
"Beyond it's elasticity" means that the string will now break. Overpitching a
string will not cause false (real) beats in and of itself unless there is some
bridge involvement. And chipping a piano even a half-step high seems to be way
more than necessary. I have typically chipped the piano about 25 cents sharp,
watched it fall, then chipped it again 10 cents sharp before actually tuning
it, with very stable results.
Paul
-----Original Message-----
From: Joe And Penny Goss
<imatunr at srvinet.com>
To: Pianotech List
<pianotech at ptg.org>
Sent: Tue, 8 Apr 2008 12:46 pm
Subject: Re:
sharp tuning
Hi Wim,
I suspect there will be a slurry of false beating
sounds in the upper range of this instrument, caused by over stretching of the
wire beyond it's elasticity.
Joe Goss RPT
Mother Goose Tools
imatunr at srvinet.com
www.mothergoosetools.com
-----
Original Message -----
From:
Willem Blees
To:
pianotech at ptg.org
Sent:
Tuesday, April 08, 2008 11:03 AM
Subject:
Re: sharp tuning
Noah
Who ever restrung this piano really took a
chance tuning the piano a whole step sharp.?I chip a piano a half a
step high, but even my first tuning is only 25 cents high. I don't think
this dealer?understands what is happening to this piano. Is he telling
you to keep it a whole step high because he doesn't want to pay you to do
more than just a tuning, or does he think customers?won't notice. In my
opinion, he is not being honest with him self, much less his customers.
Willem (Wim) Blees, RPT
Piano
Tuner/Technician
Honolulu, HI
Author of
The Business of Piano
Tuning
available from Potter Press
www.pianotuning.com
-----Original
Message-----
From: Noah Haverkamp <noahhaverkamp at yahoo.com>
To:
pianotech at ptg.org
Sent: Tue, 8 Apr
2008 2:01 am
Subject: sharp tuning
i began to do a
floor tuning at a warehouse last week and A4 was tuned as B4. i tuned it to
A440. A3 was B3, so i tuned it to A220. about 3 notes later i felt really
weird, so i informed the boss what was going on and was told to tune it
where it was at. it had just received new strings.
well that made it
easier to tune, but i mean, ive never heard of tuning a piano a whole tone
sharp.
Noah Haverkamp
Know-a Piano
http://www.knowapiano.com
347-308-0094
Fax:
718-701-2071
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