<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=Content-Type content="text/html; =
charset=iso-8859-1">
<META content="MSHTML 6.00.2800.1264" name=GENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY bgColor=#ffffff>
<DIV><FONT face=Arial size=2>Before I would go and start sanding the =
key
bottoms, I would try and "unshim" the balance rail. Typically =
pianos of
this vintage would shim the balance rail "universally" to get the keys =
in the
ballpark. Then they level keys from there. This is how I =
usually
raise the key height on older pianos that have excessive lost
motion.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Mike Bratcher</FONT></DIV>
<BLOCKQUOTE
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=Alpha88x@aol.com =
href="mailto:Alpha88x@aol.com">Alpha88x@aol.com</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> Thursday, November 06, =
2003 11:19
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: Key dip</DIV>
<DIV><BR></DIV><FONT face=arial,helvetica><FONT lang=0 =
face=Arial size=2
=
FAMILY="SANSSERIF">Clyde,<BR><BR> &n=
bsp; In
my experience at school, there was a similar problem in a studio =
upright in
one of the rooms at school. There were no punchings that could be =
removed
except the the cloth ones from under the balance rail. Our teacher =
suggested
that the key itself may have swelled from moisture and never shrunk =
back and
the whole key lever may be a slight bit bigger (hence sit higher on =
the
balance rail than originally made to).
<BR> We took about a 150 =
sandpaper
and sanded off a slight bit to bring the key back down. It worked. But =
we only
sanded a few thousandths. When one sands, the bottom of a key, it must =
be
sanded a bit, put back tested then removed, sanded a bit more, checked =
again
and one has to keep repeating the process until the desired height is =
achived
(Just a possiblity) Does this make
=
sense?<BR><BR>Julie<BR>Reading<BR><BR>  =
;
<BR>In a message dated 11/6/03 6:33:33 AM Eastern Standard Time,
cedel@supernet.com writes:<BR><BR>
<BLOCKQUOTE
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #0000ff 2px =
solid; MARGIN-RIGHT: 0px"
TYPE="CITE">Friends,<BR><BR>While tuning a 1980 Wurlitzer studio =
piano today
I noticed some of the<BR>bass hammers would damp the strings =
depending on
how they were played.<BR>Letoff was fine, but there was too much =
keydip,
resulting in the<BR>backchecks pushing the hammers into the strings =
after
letoff.<BR><BR>It appears to me that all other specs will be in the =
correct
range if<BR>the keydip is reduced. Can this be done by =
shimming up the
front rail<BR>of the key frame, if there are no shims to remove from =
under
the balance<BR>rail? I've never tried this. I could put =
card
punchings under all the<BR>front felt punchings, I know.
Advice?<BR><BR>Regards,
Clyde<BR><BR></BLOCKQUOTE><BR><BR></BLOCKQUOTE></FONT></FONT></BODY></HTM=
L>