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<DIV><FONT face=Arial size=2>3/8".</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Terry Farrell</FONT></DIV>
<BLOCKQUOTE dir=ltr
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>
<A title=rstrang@pa.inter.net =
href="mailto:rstrang@pa.inter.net">Richard
Strang</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A =
title=pianotech@ptg.org
href="mailto:pianotech@ptg.org">'Pianotech'</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Thursday, October 30, =
2003 3:50
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> RE: Pinblock =
Separation Repair
& Pitch Change</DIV>
<DIV><BR></DIV>
<DIV><FONT face="Courier New" color=#0000ff size=2><SPAN
class=890354520-30102003>Thanks for the info, Terry. I have to go =
make that
very repair to a piano shortly and was contemplating whether or not to =
lower
the pitch first. It this case, the separation is about 1/2" =
in the
bass and about 1/4" in the treble. Those pesky little termites are in =
there,
too. I think they are causing the problem. They are not in the =
pinblock,
though, so the piano is in tune, though 200 cents =
flat.</SPAN></FONT></DIV>
<DIV><FONT face="Courier New" color=#0000ff size=2><SPAN
class=890354520-30102003> I was also wondering what size =
bolts to
use, 1/4", 3/8"? What do you recommend?</SPAN></FONT></DIV>
<DIV><FONT face="Courier New" color=#0000ff size=2><SPAN
class=890354520-30102003>Thanks.</SPAN></FONT></DIV>
<DIV><FONT face="Courier New" color=#0000ff size=2><SPAN
class=890354520-30102003></SPAN></FONT> </DIV>
<DIV><FONT face="Courier New" color=#0000ff size=2><SPAN
class=890354520-30102003>Richard</SPAN></FONT></DIV>
<BLOCKQUOTE style="MARGIN-RIGHT: 0px">
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT =
face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B> =
pianotech-bounces@ptg.org
[mailto:pianotech-bounces@ptg.org]<B>On Behalf Of
</B>Farrell<BR><B>Sent:</B> Thursday, October 30, 2003 8:09 =
AM<BR><B>To:</B>
pianotech@ptg.org<BR><B>Subject:</B> Pinblock Separation Repair =
& Pitch
Change<BR><BR></DIV></FONT>
<DIV><FONT face=Arial>Differing opinions regarding the benefit of =
lowering
pitch prior to drawing a pinblock/backpost separation back together =
have
been expressed on this list. I am one that generally feels more =
comfortable lowering pitch. I thought it might be of benefit to put =
some
numbers on potential pitch changes. </FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>Yesterday I did one of these repairs on a =
late model
(1980s) Baldwin Acrosonic console. It had an approximate 1/4-inch =
separation
between the pinblock and the backposts and deadwood back =
assembly. The
separation had been "repaired" in the past with something that =
appeared to
be silicone bathtub adhesive - surprisingly (?) the separation =
appeared to
have widened since the application of the silicone. The piano =
was tuned
at that time (and presumably tuned at standard pitch). </FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>Prior to my repair the piano was fairly =
uniformly 75
cents flat. I dropped the pitch to between 200 and 250 cents flat =
prior to
any clamping. I yucked in West System epoxy thickened with #403 =
Microfibers. (A fine fiber blend, is used as a thickening =
additive with
resin/hardener to create a multi-purpose adhesive, especially for =
bonding
wood. Epoxy thickened with microfibers has good gap-filling =
qualities while
retaining excellent wetting/penetrating capability.) I drew =
the gap
closed slowly going back and forth among the six 3/4" pipe clamps =
(of which
two got bent pretty good!). The separation appeared to close very =
close to
100%.</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>I then checked pitch again. Piano was fairly =
uniformly
about 75 cents flat. Therefore, it appears that closing the 1/4-inch =
gap
resulted in a pitch increase of approximately 150 =
cents.</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>I will be going back to the job on Friday =
morning to
install a few through bolts, remove clamps, pitch raise and tune. If =
there
is anyone out there that perhaps has not seen this repair done (or =
whoever
for whatever reason) wants to see a few photos, I will take them =
Friday
morning. Let me know.</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>Terry
Farrell</FONT></DIV></BLOCKQUOTE></BLOCKQUOTE></BODY></HTML>