Out of control

[Ward & Probst]

Heh Jimbo,

Yeah, I am still taping aspirins on broken legs. One thing you may want to
try next time: it is possible to use the broken coil wire to splice the
string. In fact, I usually do it that way because it tends to be a bit more
stabile. It is true big wire is tough to work but it can be done.
As you know, it takes a while for trust to develop- in our case 20 years-
between an institution and a contract tech. Sometimes a change in
administration will help.
Good luck,
Dale
Dale Probst, RPT
Member, TEAM2001
PTG Annual Convention
Reno, NV --July 11-15, 2001
email: wardprobst@cst.net
(940)691-3682 voice
(940) 691-6843 fax
TEAM2001 website: http://www.ptg.org/conv.htm


-----Original Message-----
From: owner-caut@ptg.org [mailto:owner-caut@ptg.org]On Behalf Of harvey
Sent: Wednesday, February 14, 2001 2:33 PM
To: caut@ptg.org
Subject: Out of control


That's the best I could do for a title. This begins simply, then gets
more complex.

For the calculator/spreadsheet junkies:

Piano: Yamaha CFIII concert grand
Question: What is a representative tension and/or shear value (as
seen by the tuning pin) on C1 (string #4)? I'm inclined to think
tensions build up pretty fast in those last few notes. Perhaps
185~225 lbs at the moment of the bend?

Discussion:
Yesterday, before beginning to service this piano for a concert, I did
octave checks just to get the overall "lay of the land", considering
recent climate swings. I usually do A's, but for some reason, I
began with C1 this time. Although I did playing blows (not test
blows), C1 chose that moment to break.

Except for practicing while watching TV, I'm not good with splices
in real-time. Regardless, I had no core wire that large to even
attempt a splice, so another piano was substituted.

Since the break was at the pin instead of the agraffe, might I
correctly conclude that it was overpulled at some point, and that
my test just took it over the edge? If so, better then than during the
performance. Otherwise, the lowest section of this piano is
normally a "hard pull", enough to make me consider (but dismiss)
the idea that the strings are not rendering properly.

The bigger issue:
This piano has been used (and unwillfully abused) in all sorts of
venues since 1987. It has performed admirably considering NO
budget or even routine maintenance has been done. Most concert
grands with a similar service record would have been rebuilt or at
least restrung/hammers by now.

Unless something changes (budget considerations), I know this
piano is working on borrowed time. I also know that this incident,
coupled with other indicators, is a sign of things to come.

IOW, I know what projections and recommendations to make, but
am keenly aware that the university will start crying the blues about
hard times and budget restraints. That leaves me... and reality.

In summary, is anyone else having to use the band-aid service
approach on key instruments? In this instance, I can improve my in-
piano splicing abilities, somehow acquire lengths of HUGE core
wire, and so on. It's those other cliff-hanging surprises that concern
me.

Jim Harvey


Jim Harvey
harvey@greenwood.net
Greenwood (n): the largest city in South Carolina WITHOUT an Interstate