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<DIV>Euphonious,</DIV>
<DIV>Yamaha’s U5 agraffes are used as the termination of the speaking
length.</DIV>
<DIV>Roger Gable</DIV>
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<DIV style="font-color: black"><B>From:</B> <A title=lclgcnp@yahoo.com
href="mailto:lclgcnp@yahoo.com">Euphonious Thumpe</A> </DIV>
<DIV><B>Sent:</B> Saturday, February 09, 2013 10:50 AM</DIV>
<DIV><B>To:</B> <A title=pianotech@ptg.org
href="mailto:pianotech@ptg.org">pianotech@ptg.org</A> </DIV>
<DIV><B>Subject:</B> Re: [pianotech] question about agraffes and
uprights</DIV></DIV></DIV>
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<DIV>Another point about agraffes, of course, is that the arched surface
of the hole interior mates better with the string roundness than a flat
surface. (So, I'm guessing, less propensity to vibrate loosely against it
and "zing".) My comment about capos was merely meant to discuss
reflectivity. No other factors. As Ron said, there are "too many
variables" in this situation (relative hardnesses of capos, agraffes,
string lengths and tensions, etc.) at least for my small brain to cope
with. So be it.<BR><BR>Thumpe.<BR><BR>P.S. I've worked on only old stuff.
Does the U-5 use agraffes for speaking length terminations, or are they
above an upper plate bridge?</DIV></TD></TR></TBODY></TABLE>
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<B><SPAN style="FONT-WEIGHT: bold">From:</SPAN> </B>Roger@Integra.net
<rgable@integra.net>; <BR><B><SPAN>To:</SPAN>
</B><pianotech@ptg.org>; <BR><B><SPAN>Subject:</SPAN> </B>Re: [pianotech]
question about agraffes and uprights <BR><B><SPAN
style="FONT-WEIGHT: bold">Sent:</SPAN> </B>Sat, Feb 9, 2013 4:40:29 PM
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<TD vAlign=top>Ron,<BR>I was one of those technicians who tried using
water hardened drill rod as a bridge pin because of the almost unlimited
sizes available to reduce the amount of "drill out" of the bridge cap to
facilitate the next larger size. Ed McMorrow told me that he
experienced the same zing years ago. You are correct to mention the many
variables into the piano design that dictate the qualitative aspects of
piano tone, thus my mention of those that might want to pick apart my
explanation -- just too many variables -- and spot on with your comments
of the low quality without and the good quality
uprights.<BR><BR>Euphonious,<BR>The Yamaha U5 upright use agraffes
throughout the scale.<BR><BR>Roger Gable<BR><BR>-----Original Message-----
From: Ron Nossaman<BR>Sent: Saturday, February 09, 2013 8:02 AM<BR>To: <A
href="javascript:return"
ymailto="mailto:pianotech@ptg.org">pianotech@ptg.org</A><BR>Subject: Re:
[pianotech] question about agraffes and uprights<BR><BR>On 2/8/2013 6:00
PM, <A href="javascript:return"
ymailto="mailto:Roger@Integra.net">Roger@Integra.net</A> wrote:<BR>>
Certainly, it is known that if you install a hard bridge pin<BR>> made
of water cooled drill rod, you will hear a zing in the string<BR>>
especially in the mid to lower sections; so hardness of the<BR>>
terminations are important.<BR><BR>Is it? I confess I've never tried it,
nor run across it. String<BR>termination zings I've encountered have
always been from inadequate<BR>bearing or pin angles. I know Ron Overs is
a big fan of hardened<BR>terminations, and routinely electroless nickel
plates agraffes to harden<BR>the termination surface. He has also custom
made steel agraffes to get<BR>as hard and rigid a termination as he can.
He flame hardens capos as<BR>well. His pianos are as clean sounding as
anything I've heard.<BR><BR><BR>> Now let’s see how the flood
of<BR>> comments or counter comment picks this apart, especially those
that<BR>> claim that the lower quality grand pianos with no agraffes
sound<BR>> “fine” and the good quality uprights without agraffes sound
great.<BR><BR>To me, lower quality grands without agraffes sound like
lower quality<BR>grands, and good quality uprights tend to sound like good
quality<BR>uprights if the voicing is decent. I can't blame either on the
presence<BR>or lack of agraffes. There are way too many other
variables.<BR>Ron N
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