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<DIV><SPAN class=480111612-08062001><FONT face=Arial color=#0000ff =
size=2>Kevin,</FONT></SPAN></DIV>
<DIV><SPAN class=480111612-08062001><FONT face=Arial color=#0000ff =
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=480111612-08062001><FONT face=Arial color=#0000ff =
size=2>I've
never been able to trace down a ringing sound to a plate. However, =
you
might eliminate some possibilities by trying some different
troubleshooting. Get a strip of wood (oh say 3/4" x 3/4") and =
whatever
length is easy to work with (12"-18") with a strip of thick soft felt =
glued to
one edge. You press this strip against a large group of strings =
and
eliminate any leakage that the dampers are letting through. This =
works
especially well when a damper leak is occurring at a sympathetic =
vibration other
than the fundamental (or when the fundamental of the string is the =
sympathetic
vibration from another note.</FONT></SPAN></DIV>
<DIV><SPAN class=480111612-08062001><FONT face=Arial color=#0000ff =
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=480111612-08062001><FONT face=Arial color=#0000ff =
size=2>Makes
it easy to find these kind of problems and would eliminate problems in =
the
damper system before you start trying to change any plate =
resonance.
Personally I would much prefer to make some changes in the dampers than =
to the
plate...</FONT></SPAN></DIV>
<DIV><SPAN class=480111612-08062001><FONT face=Arial color=#0000ff =
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=480111612-08062001><FONT face=Arial color=#0000ff =
size=2>Hope
this helps.</FONT></SPAN></DIV>
<DIV><FONT face=Arial color=#0000ff size=2></FONT> </DIV>
<P><FONT size=2>Allan<BR>Allan L. Gilreath, RPT<BR>Assistant Director =
-
TEAM2001<BR>July 11-15, 2001 - Reno, =
NV<BR>agilreath@mindspring.com<BR><A
target=_blank
href="http://www.ptg.org/conv.htm">http://www.ptg.org/conv.htm</A><BR>D=
irector:
Laura Olsen, RPT<BR>Assistant Directors: Allan Gilreath, RPT - Gary =
Neie, RPT -
Dale Probst, RPT</FONT> </P>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT =
face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B> =
owner-pianotech@ptg.org
[mailto:owner-pianotech@ptg.org]<B>On Behalf Of </B>Kevin E.
Ramsey<BR><B>Sent:</B> Thursday, June 07, 2001 10:47 PM<BR><B>To:</B>
pianotech@ptg.org<BR><B>Subject:</B> Plate =
Ringing<BR><BR></FONT></DIV>
<DIV><FONT face=Arial size=2> I had an odd =
occurrence today
that I really hope that you all can help me with. I had a =
customer who
has a new Steinway model 4510 (model 45?) studio, with damper =
problems. When I
got out there, it's kind of a damper problem, but not really. The =
problem
is;</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>A) The whole piano rings, when =
you play a
chord or any note in a staccato fashion.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>B) The pedals are not lifting =
the
dampers.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>C) The spoons are not too early, the =
strings have
plenty of follow.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>D) The dampers are aligned properly.
</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2> In short, no real =
problem with
the damper system. What I did notice while working on the trapwork was =
that if
I stuck the plate with the heel of my hand, the whole piano would =
ring. When
you struck the piano anywhere, it would ring. </FONT></DIV>
<DIV><FONT face=Arial size=2> I did notice that =
some of the
bi-chords where indented by the strings, but they had plenty of
follow-through.</FONT></DIV>
<DIV><FONT face=Arial size=2> The waste ends on =
the hitch
pin side of the strings were already braided. </FONT></DIV>
<DIV><FONT face=Arial size=2> I tried striking =
notes with my
hand on groups of strings, and no effect. I strummed groups of notes =
and found
nothing leaking. And yet the whole piano had a real ring to it. =
</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2> I'm just wondering =
if the
plate, being sand cast, could have warped and twisted enough to cause =
some
weird tension on it which would cause it to ring like a bell. I mean, =
if
something as massive as a plate wanted to ring, could you really =
expect the
energy to go up the strings to be damped by little pieces of =
felt?
</FONT></DIV>
<DIV><FONT face=Arial size=2> I hope that =
someone can help
me out. Tomorrow I call Kent Webb, and see if he can =
help.</FONT></DIV>
<DIV><FONT face=Arial size=2> One interesting =
note here.
This piano was just purchased three months ago. I looked it up in the =
Atlas,
it was produced in '96.</FONT></DIV>
<DIV><FONT face=Arial size=2> =
</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Kevin E. Ramsey<BR><A
href="mailto:ramsey@extremezone.com">ramsey@extremezone.com</A>
</FONT></DIV></BLOCKQUOTE></BODY></HTML>