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<DIV><FONT face=Arial size=2>Julia,</FONT></DIV>
<DIV><FONT face=Arial size=2>Just a quick thought, sometimes it =
appears that the
jack is going back under the hammer butt and even when the jack is =
pushed with a
screw driver to check for further travel, it will go no further. =
When in
fact the jack should go back further but is being stopped by too thick a =
felt
due to using too thick a square of felt when replacing a lost felt.Check =
the
distance the other jacks that work are moving.Sorry for the disjointed =
thoughts
in a hurry to get on the road. <G></FONT></DIV>
<DIV>Joe Goss RPT<BR>Mother Goose Tools<BR><A
href="mailto:imatunr@srvinet.com">imatunr@srvinet.com</A><BR><A
href="http://www.mothergoosetools.com">www.mothergoosetools.com</A></DI=
V>
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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=davidskolnik@optonline.net
href="mailto:davidskolnik@optonline.net">David Skolnik</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> Tuesday, November 23, =
2004 9:17
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: jack slides out =
before
delivering power</DIV>
<DIV><BR></DIV>Julia -<BR><BR>Your description of the symptoms remains =
a bit
unclear. Do you mean that if you were to sit down at the piano =
and play
each note forcefully, once, that each would play, but if you were to =
do the
same with a minimal force, it would not? Or is it that a note, =
after
being played softly once, will cheat when attempted again? =
While
Issac and David Stahl might be correct in assessing the jack pinning =
as the
problem, it could also relate to key leveling, though the opposite to =
what you
suggested. If there is not enough (just enough) lost =
motion,
the jack will not return under the butt on a slow (soft) release. =
Besides
leveling, other possible contributing keyboard issues could be either =
excess
friction or excess front weighting. This could be further =
aggravated by
tight wippin pinning, excess friction between jack top and butt =
leather, bad
geometry of the butt profile, incorrect thickness of butt =
cushion, or an
imbalance between hammer return spring and jack spring. =
<BR><BR>I
recall working on a small Steinway consol, some years ago, where the
configuration of the lower butt geometry created the dilemma where, by =
the
time I eliminated excess lost motion, the jack would not navigate over =
what
appeared (to it) as an inverted speed bump.<BR><BR>On the other hand, =
it might
just be the jack pinning.<BR><BR>Let us know.<BR><BR>David
Skolnik<BR><BR><BR><BR>At 11:52 PM 11/22/2004 -0500, you wrote:<BR>
<BLOCKQUOTE class=cite cite="" type="cite"><FONT =
size=2>Greetings,
=
<BR><BR>  =
;
Working on a Hamilton built by Baldwin studio upright today, I =
noticed
that on a reallly soft blow to the key, the jack wants to slip =
forward
almost to the back of the catch's shank, instead of delivering the =
kick to
the base of the hammer
=
butt.<BR><BR> =
The customer complained that, on a soft blow the key wouldn't play =
and would
sort of jam. Looking at this situation I saw that the jack would =
sometimes
just slip out too much forward and not deliver its power. What would =
cause
this? Could the keys not be levelled high enough?<BR><BR>Julia
Gottchall,<BR>Reading PA =
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