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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>
<A title=danieljcarlton@sbcglobal.net
href="mailto:danieljcarlton@sbcglobal.net">daniel carlton</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A =
title=pianotech@ptg.org
href="mailto:pianotech@ptg.org">pianotech@ptg.org</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Monday, January 12, 2004 =
8:36
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> jack in the =
mortise</DIV>
<DIV><BR></DIV>
<DIV>
<DIV>i have a question regarding centering the jack in the mortise =
(using a
hammer tap on the head of the jack). do the jacks need to be =
positioned
in the exact center of the mortise or can they get away with =
being
off-center?</DIV>
<DIV>another question. it seems that bending the center =
pins like
this sometimes causes resistance toward the end of the jack's =
travel.
this concerns me because it seems that it can affect the =
regulation
and feel. is this just my imagination. is it any big =
deal?</DIV>
<DIV>any info and advice is greatly appreciated.</DIV>
<DIV> </DIV>
<DIV>thanks</DIV>
<DIV> </DIV>
<DIV>daniel carlton</DIV>
<DIV> </DIV>
<DIV> It doesn't have to be precisely in the center, =
as long
as it's not rubbing the side of the "window". Yes, bending the =
pin can
cause resistance in jack travel and no, it's probably not a big deal =
for your
average piano player, but for fine regulation of fine grands, it might =
be. And for this reason some techs recommend straightening the
repetition lever post instead. It's claimed that this is what =
causes the
jack to rub the side of the rep. lever window in the first =
place.
The rep. lever post dries out and warps, or twists slightly as the =
wood ages
or acclimatizes, and then the rep. lever is no longer exactly parallel =
above
the wippen body. </DIV>
<DIV> I don't know how one goes about
straightening those posts -- pull 'em off and re-glue =
'em?
--heat 'em up with a heat gun and try to twist them? They're =
pretty
thick -- I haven't tried straightening them as I don't know an =
effective
method for doing so. </DIV>
<DIV> Anybody else?</DIV>
<DIV> --David Nereson,
RPT </DIV></DIV></BLOCKQUOTE></BODY></HTML>