<html> <head> <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1"> <meta name=Generator content="Microsoft Word 10 (filtered)"> <style>  </style> </head> <body lang=EN-US link=blue vlink=blue> <div class=Section1> Plate warp.  Seemingly unavoidable.    <div> David Love davidlovepianos@comcast.net www.davidlovepianos.com </div> -----Original Message----- From: pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] On Behalf Of Frank Emerson Sent: Thursday, June 07, 2007 6:54 PM To: Pianotech List Subject: RE: string height   <div> <div> I cannot imagine the design intent being anything other that equal string heights at the respective strike points.  Are you sure you were measuring precisely at the strike point?  If you were measuring somewhat forward of the strike point, you would consistently get the results you describe.  Usually, the diameter of the wire,the incline of the string, and the strike point are taken into account in calculating the counter bore for agraffes, to achieve equal string heights at the strike point.  It is also possible that the plate could have been set lower than intended in the design, causing the bridges to be planed lower for correct bearing, and thereby, inadvertently compromising the consistency of the string height at the strike point. </div> <div>   </div> <div> <div> Frank Emerson </div> <div>   </div> </div> </div> <div>   </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-bottom:5.0pt'> <div> ----- Original Message ----- </div> <div style='font-color:black'> From: <a href="mailto:reggaepass@aol.com" title="reggaepass@aol.com"></a> </div> <div> To: <a href="mailto:pianotech@ptg.org" title="pianotech@ptg.org">pianotech@ptg.org</a>;<a href="mailto:caut@ptg.org" title="caut@ptg.org">caut@ptg.org</a> </div> <div> Sent: 6/7/2007 12:59:12 PM </div> <div> Subject: string height </div> <div>   </div> Hi Lists, We recently measured string heights on a Steinway B andÂ  Yamaha G2.Â  An astute assistant noticed that on both pianos the highest note (pitch-wise) in the tenor was higher than the lowest note in the tenor (more than can be explained by the gradual decrease in wire diameters, were the agraffes all level) and that the lowest note in the capo (pitch-wise) was higher than the highest note (C8).Â  Is it just a coincidence that we happen to measure two very different pianos with this same set-up, or is there an overarching design reason for this (making it a goal by design shared by many manufacturers)? Thanks, Alan Eder <div> <div class=MsoNormal align=center style='margin-right:0in;margin-bottom:0in; margin-left:.5in;margin-bottom:.0001pt;text-align:center'> <hr size=2 width="100%" align=center> </div> AOL now offers free email to everyone. Find out more about what's free from AOL at <a href="http://www.aol.com?ncid=AOLAOF00020000000437" target="_blank">AOL.com</a>. </div> </blockquote> </div> </body> </html>