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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif";color:#1F497D'>Tony,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif";color:#1F497D'>It is done with heat – case hardening, in effect.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif";color:#1F497D'>Not something to be taken lightly. Much damage can be done if one just takes a torch to it!<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif";color:#1F497D'>You might check with Yamaha with the serial number. This piano may already have hardened capo bars. In my experience softer capos do not necessarily mean buzzing noises. Badly shaped bearing surfaces can lead to buzzing over time, and excessively long front duplex lengths with a low string angle can be very noisy from duplex noise.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif";color:#1F497D'>Don Mannino<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif";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>Tony Caught<br><b>Sent:</b> Wednesday, June 29, 2011 2:39 AM<br><b>To:</b> pianotech@ptg.org<br><b>Subject:</b> [pianotech] Capo Bar<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span lang=EN-AU><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-AU>How do you harden the capo bar in a grand piano.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-AU><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-AU>Have a Yamaha CF that is buzzing wildly in the upper treble. I am going to release the tension on the strings in the upper section then seesaw some emery paper over the grooves to get the bar smooth but this bar is IMO to soft. Can this be chemically treated to harden it or how should it be done.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-AU><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-AU>Tony<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-AU><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-AU style='font-size:12.0pt'>Tony Caught<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-AU style='font-size:12.0pt'><a href="mailto:acaught@internode.on.net">acaught@internode.on.net</a><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-AU>0427 850 737<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-AU><o:p> </o:p></span></p></div></body></html>