<div> <font face="Arial, Helvetica, sans-serif">Tom:<br> <br> Crack occur internally as well if the block is laminated. Delamination is a form of cracking, and the voids between laminates could easily cause torque differences along the length of the pin, creating more of "twist moment" than a "turn moment". Again, the restringing sounds suspect.<br> <br> Paul<br> </font></div> <div> <br> </div> <div> <br> </div> -----Original Message-----<br> From: Tom Sivak <tvaktvak@sbcglobal.net><br> To: Pianotech List <pianotech@ptg.org><br> Sent: Wed, 17 Oct 2007 9:18 pm<br> Subject: RE: Extreme jumpiness<br> <br> <div id="AOLMsgPart_2_65b5687e-abc6-4b83-a31e-e1248d0aeaaf"> <div>It's an open faced pin block.  Looks perfect.  The pins that are loose are generally on the bottom row, though not necessarily adjacent to one another.   If it's a crack, it doesn't follow a clear path.</div> <div> </div> <div>Can there be a crack that can't be seen in an open faced pinblock?  In this case, the wood is beautiful, and not a sign of a crack.  </div> <div> </div> <div>Tom Sivak</div> <div>Chicago<br> <br> <b><i>Dean May <<a href="mailto:deanmay@pianorebuilders.com">deanmay@pianorebuilders.com</a>></i></b> wrote:</div> <blockquote class="replbq" style="border-left: 2px solid rgb(16, 16, 255); padding-left: 5px; margin-left: 5px;"> <style>  </style> <div class="Section1"> <div class="MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; color: navy; font-family: Arial;">What kind of piano is this? Are you sure it has a wooden pin block?</span></font></div> <div class="MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; color: navy; font-family: Arial;"> </span></font></div> <div> <div class="MsoAutoSig"><b><font color="navy" face="Bradley Hand ITC" size="6"><span style="font-weight: bold; font-size: 22pt; color: navy; font-family: 'Bradley Hand ITC';">Dean</span></font></b><font color="navy"><span style="color: navy;"></span></font></div> <div class="MsoAutoSig" style="margin: 0in 0in 0pt;"><font color="navy" face="Times New Roman" size="3"><span style="font-size: 12pt; color: navy;">Dean May             cell 812.239.3359 </span></font></div> <div class="MsoAutoSig" style="margin: 0in 0in 0pt;"><font color="navy" face="Times New Roman" size="3"><span style="font-size: 12pt; color: navy;">PianoRebuilders.com   812.235.5272 </span></font></div> <div class="MsoAutoSig" style="margin: 0in 0in 0pt;"><font color="navy" face="Times New Roman" size="3"><span style="font-size: 12pt; color: navy;">Terre Haute</span></font><font color="navy"><span style="color: navy;"> IN  47802</span></font></div> </div> <div> <div class="MsoNormal" style="text-align: center;" align="center"><font face="Times New Roman" size="3"><span style="font-size: 12pt;"> <hr align="center" size="2" width="100%"> </span></font></div> <div class="MsoNormal"><b><font face="Tahoma" size="2"><span style="font-weight: bold; font-size: 10pt; font-family: Tahoma;">From:</span></font></b><font face="Tahoma" size="2"><span style="font-size: 10pt; font-family: Tahoma;"> <a href="mailto:pianotech-bounces@ptg.org">pianotech-bounces@ptg.org</a> [<a href="mailto:pianotech-bounces@ptg.org?">mailto:pianotech-bounces@ptg.org</a>] <b><span style="font-weight: bold;">On Behalf Of </span></b>Tom Sivak<br> <b><span style="font-weight: bold;">Sent:</span></b> Wednesday, October 17, 2007 8:34 PM<br> <b><span style="font-weight: bold;">To:</span></b> pianotech<br> <b><span style="font-weight: bold;">Subject:</span></b> Extreme jumpiness</span></font></div> </div> <div class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;"> </span></font></div> <div> <div class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;">List</span></font></div> </div> <div> <div class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;"> </span></font></div> </div> <div> <div class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;">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.</span></font></div> </div> <div> <div class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;"> </span></font></div> </div> <div> <div class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;">So I went, CA in hand, and found that about 20 pins had fallen, some were a 4th under pitch!</span></font></div> </div> <div> <div class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;">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.</span></font></div> </div> <div> <div class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;"> </span></font></div> </div> <div> <div class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;">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!  </span></font></div> </div> <div> <div class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;"> </span></font></div> </div> <div> <div class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;">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.</span></font></div> </div> <div> <div class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;"> </span></font></div> </div> <div> <div class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;">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.</span></font></div> </div> <div> <div class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;"> </span></font></div> </div> <div> <div class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;">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</span></font></div> </div> <div> <div class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;">Chicago</span></font></div> </div> </div> </blockquote><br> </div>  <div class="AOLPromoFooter"> <hr style="margin-top:10px;" /> Email and AIM finally together. You've gotta check out free <a href="http://o.aolcdn.com/cdn.webmail.aol.com/mailtour/aol/en-us/index.htm?ncid=AOLAOF00020000000970" target="_blank">AOL Mail</a>!<br/> </div>