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<DIV><STRONG><FONT face=Arial>Sounds like when the new pins were installed, the
block had either been contaminated by a lubricant, possibly
WD40.</FONT></STRONG></DIV>
<DIV><STRONG><FONT face=Arial>They had then gone up two sizes of
pin.</FONT></STRONG></DIV>
<DIV><STRONG><FONT face=Arial>Another possibility is that the holes had been
prepared for the repinning, with a spoon bit that had been the wrong size, and
put in too fast, glazing the hole.</FONT></STRONG></DIV>
<DIV><STRONG><FONT face=Arial>I would try removing the pin, in the few notes
that are really bad, redrilling with the proper size bit or reamed, for a
specific size pin.</FONT></STRONG></DIV>
<DIV>John M. Ross<BR>Windsor, Nova Scotia, Canada<BR><A
href="mailto:jrpiano@win.eastlink.ca">jrpiano@win.eastlink.ca</A></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=tvaktvak@sbcglobal.net href="mailto:tvaktvak@sbcglobal.net">Tom
Sivak</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> Wednesday, October 17, 2007 9:33
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Extreme jumpiness</DIV>
<DIV><BR></DIV>
<DIV>List</DIV>
<DIV> </DIV>
<DIV>Have had the displeasure of tuning an old upright which has been restrung
with new oversized pins. I was called in to tune it by the man who
restrung it; he asked me to CA the pinblock because the strings kept slipping
flat.</DIV>
<DIV> </DIV>
<DIV>So I went, CA in hand, and found that about 20 pins had fallen, some were
a 4th under pitch!</DIV>
<DIV>I got out my tuning lever and pulled the offenders up to pitch and was
shocked to find how tight the pins were. On some of the pins, I
literally had to use ALL MY STRENGTH to make the pin move at all. (And
I'm 6 feet tall and 210 pounds.) Then it would jump a whole step, and
I'd try to coax it back, but it would jump back down, too low, and...you know
the routine.</DIV>
<DIV> </DIV>
<DIV>The reason I'm writing is to gain some insight into this situation,
hopefully. How can a pin be sooo tight that I have to extend my lever,
watch it bend as I apply pressure, hoping that my lever won't break, just
trying to get the pin to move...and yet not be able to hold?<BR><BR>Now, I've
been there three times in the last two months. The first time, I did not
apply any CA to the pinblock. My God, they were so tight, yet jumpy to
the max. Because it took so much strength to get the pin to move, it was
difficult to make any small movements. I thought, with my superior
tuning lever technique, I would be able to get the pins to hold.
HA! </DIV>
<DIV> </DIV>
<DIV>Next time I applied CA to all the pins that had slipped. After it
dried, they were tighter than ever, even harder to get them to move. One
month later, about half of them had slipped again. I re-applied the CA
and was there last week. Only about 6 of them had slipped, but it still
boggles my mind.</DIV>
<DIV> </DIV>
<DIV>Understand that it is just as difficult to get the pins to go flat.
I mean, as you try and turn the pin, and it jumps to the sharp side on you,
and then you try to push it back down, and it jumps to the flat side, and you
toggle back and forth...it's just as hard to get the pin to move south as it
is north.</DIV>
<DIV> </DIV>
<DIV>Any thoughts? Tuning pins too big? Cracks in pinblock? (Open
faced pin block, showing no cracks...) Should I use WD-40 instead
of CA? (Just a joke...just a joke...)<BR><BR>Tom Sivak</DIV>
<DIV>Chicago</DIV></BLOCKQUOTE></BODY></HTML>