<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"> <head> <meta http-equiv=Content-Type content="text/html; charset=us-ascii"> <meta name=Generator content="Microsoft Word 12 (filtered medium)"> <style>  </style>  </head> <body bgcolor=white lang=EN-US link=blue vlink=purple> <div class=Section1> <p class=MsoNormal><span style='color:#1F497D'>Don:<o:p></o:p></span></p> <p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p> <p class=MsoNormal><span style='color:#1F497D'>When you move the lyre brace mounting closer to the lyre you’re adding force forward, but actually even more force <i>downward</i>.  If these lyre assemblies are not constructed of pretty hard wood and good glue do you think this extra downward force would accelerate wear?<o:p></o:p></span></p> <p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p> <p class=MsoNormal><span style='color:#1F497D'>dp<o:p></o:p></span></p> <p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p> <div> <p class=MsoNormal><span style='color:#1F497D'>David M. Porritt, RPT<o:p></o:p></span></p> <p class=MsoNormal><span style='color:#1F497D'><a href="dporritt@smu.edu"><span style='color:blue'>dporritt@smu.edu</span></a><o:p></o:p></span></p> </div> <p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p> <div> <div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'> <p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] <b>On Behalf Of </b>Don Mannino<br> <b>Sent:</b> Friday, July 11, 2008 10:47 AM<br> <b>To:</b> Pianotech List<br> <b>Subject:</b> Re: Young Chang lyre supports buzzing<o:p></o:p></span></p> </div> </div> <p class=MsoNormal><o:p> </o:p></p> <div> <p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Bruce,</span><span style='font-size:10.0pt;font-family:"MS Sans Serif","serif"'><o:p></o:p></span></p> </div> <div> <p class=MsoNormal><span style='font-size:10.0pt;font-family:"MS Sans Serif","serif"'> <o:p></o:p></span></p> </div> <div> <p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>It works well to re-locate the top of the lyre support.  The rods should really be pushing the lyre forward a little anyway, so by re-locating the tops of the supports slightly closer to the lyre, you "load" the system for best stability and strength.  It also stops the rods from buzzing.</span><span style='font-size:10.0pt;font-family:"MS Sans Serif","serif"'><o:p></o:p></span></p> </div> <div> <p class=MsoNormal><span style='font-size:10.0pt;font-family:"MS Sans Serif","serif"'> <o:p></o:p></span></p> </div> <div> <p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>It's also easy to do, as the wood on the bottom of the keybed is pretty soft.  Just remove the screws, drop the support rod down and plug the holes.  Then raise the rod back into position, and push the top of the support rod towards the lyre, and drive the screws back in at the new location.</span><span style='font-size:10.0pt;font-family:"MS Sans Serif","serif"'><o:p></o:p></span></p> </div> <div> <p class=MsoNormal><span style='font-size:10.0pt;font-family:"MS Sans Serif","serif"'> <o:p></o:p></span></p> </div> <div> <p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>While you're there, check that the pedal lyre isn't coming apart where the posts meet the box.  This could be the reason for the support rods loosening.  Fixing the lyre might also tighten the rods back up in the original location.</span><span style='font-size:10.0pt;font-family:"MS Sans Serif","serif"'><o:p></o:p></span></p> </div> <div> <p class=MsoNormal><span style='font-size:10.0pt;font-family:"MS Sans Serif","serif"'> <o:p></o:p></span></p> </div> <div> <p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Don Mannino</span><span style='font-size:10.0pt;font-family:"MS Sans Serif","serif"'><o:p></o:p></span></p> </div> <div> <p class=MsoNormal><span style='font-size:10.0pt;font-family:"MS Sans Serif","serif"'> <o:p></o:p></span></p> </div> <blockquote style='border:none;border-left:solid black 1.5pt;padding:0in 0in 0in 4.0pt; margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt'> <div> <p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>----- Original Message ----- <o:p></o:p></span></p> </div> <div> <p class=MsoNormal style='background:#E4E4E4'><b><span style='font-size:10.0pt; font-family:"Arial","sans-serif"'>From:</span></b><span style='font-size:10.0pt; font-family:"Arial","sans-serif"'> <a href="mailto:bdornfeld@earthlink.net" title="bdornfeld@earthlink.net">Bruce Dornfeld</a> <o:p></o:p></span></p> </div> <div> <p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>To:</span></b><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'> <a href="mailto:pianotech@ptg.org" title="pianotech@ptg.org">pianotech</a> <o:p></o:p></span></p> </div> <div> <p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Sent:</span></b><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'> Thursday, July 10, 2008 9:29 PM<o:p></o:p></span></p> </div> <div> <p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Subject:</span></b><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'> Young Chang lyre supports buzzing<o:p></o:p></span></p> </div> <div> <p class=MsoNormal><span style='font-size:10.0pt;font-family:"MS Sans Serif","serif"'><o:p> </o:p></span></p> </div> <div> <p class=MsoNormal><span style='font-size:10.0pt;font-family:"MS Sans Serif","serif"'>I have a number of grand pianos built by Young Chang that I service that have the same trouble.  The lyre support brackets vibrate or buzz with some frequencies when the piano is played.  When all of the screws are tightened, there is too much play in the hinge.  This is most often causing noise at the top of the lyre support, but sometimes at the bottom too.  Sympathetic vibrations are always a pain, but I do not know how to fix these. <o:p></o:p></span></p> </div> <div> <p class=MsoNormal><span style='font-size:10.0pt;font-family:"MS Sans Serif","serif"'> <o:p></o:p></span></p> </div> <div> <p class=MsoNormal><span style='font-size:10.0pt;font-family:"MS Sans Serif","serif"'>This week, I removed a pair of them to repair,  First, I tried hitting the pin with a ball peen hammer with the other end on an anvil, but it only made it flatter outside of the hinge area.  Previously, I have tried wrapping some yarn around it, but it did not last.  I have considered squeezing the bracket around the pin, but is looks like cast metal and I am afraid it might just break.<o:p></o:p></span></p> </div> <div> <p class=MsoNormal><span style='font-size:10.0pt;font-family:"MS Sans Serif","serif"'> <o:p></o:p></span></p> </div> <div> <p class=MsoNormal><span style='font-size:10.0pt;font-family:"MS Sans Serif","serif"'>There are tons of Young Changs out there.  What are you all doing to keep the lyre support brackets from vibrating along with the music?  I can't be the only one having trouble with these!  Help me!  Please! <o:p></o:p></span></p> </div> <div> <p class=MsoNormal><span style='font-size:10.0pt;font-family:"MS Sans Serif","serif"'> <o:p></o:p></span></p> </div> <div> <p class=MsoNormal><span style='font-size:10.0pt;font-family:"MS Sans Serif","serif"'> <o:p></o:p></span></p> </div> <div> <p class=MsoNormal><span style='font-size:10.0pt;font-family:"MS Sans Serif","serif"'>Bruce Dornfeld, RPT<o:p></o:p></span></p> </div> <div> <p class=MsoNormal><span style='font-size:10.0pt;font-family:"MS Sans Serif","serif"'><a href="mailto:bdornfeld@earthlink.net">bdornfeld@earthlink.net</a><o:p></o:p></span></p> </div> <div> <p class=MsoNormal><span style='font-size:10.0pt;font-family:"MS Sans Serif","serif"'>North Shore Chapter<o:p></o:p></span></p> </div> </blockquote> </div> </body> </html>