<font color='black' size='2' face='arial'><span class="Apple-style-span" style="font-family: Arial, Helvetica, sans-serif;">When did Yamaha start fitting their pinblocks snugly up against the plate flange?</span><br> <br> <div style="clear:both"></div> Alan Eder<br> <br> <div style="font-family:helvetica,arial;font-size:10pt;color:black">-----Original Message-----<br> From: Leslie Bartlett <l-bartlett@sbcglobal.net><br> To: pianotech <pianotech@ptg.org><br> Sent: Thu, Sep 8, 2011 4:35 pm<br> Subject: Re: [pianotech] yamaha C6<br> <br> <div id="AOLMsgPart_1_075249e2-b939-47d1-a0b9-35c9efba4df2"> <div class="Section1"> <div class="MsoNormal"><font size="2" color="blue" face="Arial"><span style="font-size: 10.0pt;font-family:Arial;color:blue">Hmmm hadn’t thought of pin block. I’ll give it a look. I expect the piano was 10+ years old when I started tuning it.</span></font></div> <div class="MsoNormal"><font size="2" color="blue" face="Arial"><span style="font-size: 10.0pt;font-family:Arial;color:blue">Les</span></font></div> <div class="MsoNormal"><font size="2" color="blue" face="Arial"><span style="font-size: 10.0pt;font-family:Arial;color:blue"> </span></font></div> <div class="MsoNormal"><font size="2" color="blue" face="Arial"><span style="font-size: 10.0pt;font-family:Arial;color:blue"> </span></font></div> <div> <div class="MsoNormal" align="center" style="text-align:center"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> <hr size="2" width="100%" align="center"> </span></font></div> <div class="MsoNormal"><b><font size="2" face="Tahoma"><span style="font-size:10.0pt; font-family:Tahoma;font-weight:bold">From:</span></font></b><font size="2" face="Tahoma"><span style="font-size:10.0pt;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>Joe DeFazio<br> <b><span style="font-weight:bold">Sent:</span></b> Thursday, September 08, 2011 9:27 PM<br> <b><span style="font-weight:bold">To:</span></b> <a href="mailto:pianotech@ptg.org">pianotech@ptg.org</a><br> <b><span style="font-weight:bold">Subject:</span></b> Re: [pianotech] yamaha C6</span></font></div> </div> <div class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size: 12.0pt"> </span></font></div> <div> <blockquote style="margin-top:5.0pt;margin-bottom:5.0pt"> <div> <div class="MsoNormal"><b><font size="4" color="#7f7f7f" face="Helvetica"><span style="font-size:13.5pt;font-family:Helvetica;color:#7F7F7F;font-weight:bold">From:<span class="apple-converted-space"> </span></span></font></b><font size="4" face="Helvetica"><span style="font-size:13.5pt;font-family:Helvetica">"Leslie Bartlett" <<a href="mailto:l-bartlett@sbcglobal.net">l-bartlett@sbcglobal.net</a>></span></font></div> </div> <div> <div class="MsoNormal"><b><font size="4" color="#7f7f7f" face="Helvetica"><span style="font-size:13.5pt;font-family:Helvetica;color:#7F7F7F;font-weight:bold">Date:<span class="apple-converted-space"> </span></span></font></b><font size="4" face="Helvetica"><span style="font-size:13.5pt;font-family:Helvetica">September 8, 2011 6:34:47 PM EDT</span></font></div> </div> <div> <div class="MsoNormal"><font size="4" face="Helvetica"><span style="font-size:13.5pt; font-family:Helvetica"> </span></font></div> </div> <div> <div class="MsoNormal"><font size="3" face="Arial"><span style="font-size:12.0pt; font-family:Arial">I’ve been tuning a C6 for 7 years or more, and it has every time been h*** to tune, and a 3-hour job. Nothing will stay stable. I’ve been doing it every two months now for awhile and today was the second time I didn’t have to go through each string on second pass. Is it possible that the agraffes have been ground so sharply that one can’t get a stable termination point?.....</span></font></div> </div> </blockquote> <div class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size: 12.0pt"> </span></font></div> </div> <div> <div class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size: 12.0pt">Hi Les,</span></font></div> </div> <div> <div class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size: 12.0pt"> </span></font></div> </div> <div> <div class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size: 12.0pt">I would be very surprised if the agraffes are the problem.</span></font></div> </div> <div> <div class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size: 12.0pt"> </span></font></div> </div> <div> <div class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size: 12.0pt">Have you checked the plate flange/block fit with a mirror, a flashlight, and a feeler gauge? If you don't have a set of feeler gauges at hand, you can us paper, of course. What you would be looking for is a fairly consistent gap between the plate and the flange in either the bass or the treble (which would allow the pinblock to rock as you added tension to one side or the other; a touching section the tenor flange/block interface would act as a pivot).</span></font></div> </div> <div> <div class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size: 12.0pt"> </span></font></div> </div> <div> <div class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size: 12.0pt">I will be somewhat surprised also if that turns out to be the problem, as most C6 pianos I service seem to be fairly carefully constructed. However, it is certainly something to check.</span></font></div> </div> <div> <div class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size: 12.0pt"> </span></font></div> </div> <div> <div class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size: 12.0pt">The tenor on some C6 pianos does seem to move more than average with changes in humidity. I have half-assumed that this was because those tenor strings were at a lower percentage of their breaking point than average (for tenor strings), but I have not scaled or rescaled one, so this is just speculation. In any case, I do quickly knock down (or lift up) the tenor of the C6 with a very fast pitch adjustment before tuning. If you are able to float the pitch a bit (measure the pitch of about the third-highest bichord, and then tune the rest of the piano to that pitch), you may be able to safely get away with just moving the tenor and then doing one pass at the floated pitch. That might save you some time.</span></font></div> </div> <div> <div class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size: 12.0pt"> </span></font></div> </div> <div> <div class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size: 12.0pt">Joe DeFazio</span></font></div> </div> <div> <div class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt">Pittsburgh</span></font></div> </div> <div class="MsoNormal" align="center" style="text-align:center"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> <hr size="1" width="100%" noshade="" color="gray" align="center"> </span></font></div> <div class="avgcert" color="#000000"><font size="3" face="Times New Roman"><span style="font-size:12.0pt">No virus found in this message.<br> Checked by AVG - <a target="_blank" href="http://www.avg.com">www.avg.com</a><br> Version: 10.0.1392 / Virus Database: 1520/3885 - Release Date: 09/08/11</span></font></div> </div> </div>  </div> </font>