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<DIV><FONT face=Arial size=2>Bob, </FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Here's a variation on the "adding =
punchings" method
that is fast and effective: Make a go-nogo gage from a strip of =
card stock
6" long by 3/4" wide, with paper punchings laminated to each end to a =
thickness
of "target let-off plus .005" at one end, "target let-off minus .005" at =
the
other. Cut a slot in to the punching hole in each end. Now =
you can
slip the gage in under any key, and test for let-off. If the note =
lets off
with the thin end, and does not let off with the thick end, move =
on. Two
people rarely get the same result with the same gage due to differences =
in how
much pressure they apply to the key. I first started using =
this
method with gages at .050 and .060, but now I use .030 and .040 =
(with a
lighter touch). You could argue that .010 is too wide a tolerance =
range
for let-off, but you'll find that with practice you can "feel" finer =
differences
with the gages set this far apart.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>hope this helps</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>Mike Spalding RPT</FONT> </DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<BLOCKQUOTE
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
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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=hullfam5@yahoo.com href="mailto:hullfam5@yahoo.com">Bob =
Hull</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> Saturday, March 15, 2003 =
12:49
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Aftertouch =
evaluation</DIV>
<DIV><BR></DIV>
<P>I am wondering about the value of different methods of evaluating
aftertouch on a grand. I know one method is to add punchings on top of =
those
on the front rail pin until let-off can't take place; </P>
<P>Another method I've heard of and used is to look at the final =
position of
the jack in relationship to the knuckle and jack cushion after drop - =
but this
can't be done with the action in the piano; The next method =
(which I
don't think I've read about anywhere) is my question to the =
list: Can
you accurately evaluate aftertouch by traveling the key/hammer =
through
drop and then moving the jack tender downward to see how far the jack =
travels
before being stopped by the jack cushion?</P>
<P>Also, if you are using the addition of punchings on the front rail =
pin
until let-off fails, what are some good parameters to stay within for =
"good"
aftertouch, i.e. .050 - .060 ? I know the Steinway manual says =
that a
good amount is about the thickness of a new penny. How far can =
we stray
from that measurement and still be alright?</P>
<P>Bob</P>
<P><BR>
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