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<DIV><FONT size=2>Paul:</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>Because of the difference in diameter between the =
coil portion
and the block portion, is there any danger of shearing the pin off if =
the pin is
too tight in the block?</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>David Love</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=larudee@pacbell.net
href="mailto:larudee@pacbell.net">larudee@pacbell.net</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> January 26, 2002 11:54 =
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: Tuning Pin =
Size</DIV>
<DIV><BR></DIV>David,
<P>You are right on target. Comments below.
<P>Paul
<P>David Skolnik wrote:
<BLOCKQUOTE TYPE="CITE"> Paul - <BR>I think you are =
right. There
has and will be plenty to discuss. I, at least, have already =
gotten
the Feb issue, and also promise to read it, but some of my concerns =
date
back to a number of months ago when, in response to a particular =
thread, you
first started talking about your pin. One of these concerns is =
that,
as a way of avoiding block replacement, they are not viable if, as =
in many
of the pianos I see, the original pins are already against the =
plate,
whatever their size.</BLOCKQUOTE>Yep, there's no way my pins will =
back the
holes off away from the plate. The only good solution there is a =
new
block.
<BLOCKQUOTE TYPE="CITE">Second, while I understand (I think) the =
theory
regarding torque and flex, I suspect that other factors, such as =
lack of
quality control of pins, or of the fit between pin and block =
(whether new or
repinned), not to mention too much or too <U>little</U> friction =
between pin
and sounding length of string, have much effect upon tunability than =
the
diameter around which the string coils.</BLOCKQUOTE>These are all =
extremely
important, and there is no way that my pins are designed to compensate =
for
inadequacies in any of these areas. In fact, one of the cautions =
I
include with the pins is not to overtighten them, which is a problem I =
find
with some restrung pianos. My pins do not need to be as tight, =
because
of the reduced torque. Furthermore, the difference between what =
I call
uptorque and downtorque (pulling with or against tension) is less with =
my pins
than with other oversize pins. Another point is that the design =
of my
pins frees the diameter at the coils to be essentially independent of =
the
diameter in the rest of the pin. Of course there are limitations =
of
strength, but otherwise very narrow diameters like 6.75mm. are =
entirely
feasible on a base that is as big as you want. That's the =
principle that
I think would be of use to Steinway. Finally, Klinke, the =
manufacturer
of my pins and regular Diamond pins makes just about the most precise =
ones in
the business. I needed that kind of precision for my pins in =
order to
get them perfectly coaxial and cylindrical. Mic them all you =
want; they
come out virtually identical.
<BLOCKQUOTE TYPE="CITE"> Remember two things about pin =
flex...1) It can
be a very useful tool in fine tuning, and 2) it is affected by =
tightness in
the block. A tight pin with no flex can be as difficult =
to fine
tune as a pin with too much flex, whatever its =
diameter.</BLOCKQUOTE>Yes, flex
can be useful, and some manufacturers rely on it more than others in =
their
design. I like to minimize it as much as possible because it =
compromises
the pin's function as a stable anchor, and I prefer to achieve =
tunability by
other means, to the extent possible.
<BLOCKQUOTE TYPE="CITE">
<P>Now to read your article and find out what you really said.. =
<BR>
<P>David Skolnik
<P>At 11:37 PM 01/25/2002 -0800, you wrote:
<BLOCKQUOTE class=cite cite="" type="cite">Chances are that at =
this point
we get into "but what about...," in which case I get to rewrite =
the whole
article on line. I would just as soon wait for the February
Journal. There will probably still be plenty to debate, but =
at least
not the stuff I've already covered in the article.
<P>Best regards,
<P>Paul</P></BLOCKQUOTE></BLOCKQUOTE></BLOCKQUOTE></BODY></HTML>