<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=Content-Type content="text/html; charset=windows-1252"> <META content="MSHTML 6.00.5730.11" name=GENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=#ffffff> <DIV>Jurgen it makes nosense to me either.</DIV> <DIV> </DIV> <DIV>Ted Sambell</DIV> <BLOCKQUOTE dir=ltr style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px"> <DIV style="FONT: 10pt arial">----- Original Message ----- </DIV> <DIV style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B> <A title=pianoforte@pianofortesupply.com href="mailto:pianoforte@pianofortesupply.com">Jurgen Goering</A> </DIV> <DIV style="FONT: 10pt arial"><B>To:</B> <A title=caut@ptg.org href="mailto:caut@ptg.org">caut@ptg.org</A> </DIV> <DIV style="FONT: 10pt arial"><B>Sent:</B> Thursday, December 21, 2006 2:04 PM</DIV> <DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [CAUT] Checking</DIV> <DIV><BR></DIV>Yes, Thanks Alan for the S&S backcheck info.<BR><BR>One question: Given an assumed constant tail length and bore length (within bass and treble) I don't quite understand why the backcheck height "increases linearly (with respect to note number) from 3 3/8" for note # 1 to 3 9/16" for note # 88".<BR><BR>Can someone clarify this?<BR>Also, would these dimensions be the same in all models?<BR><BR><?smaller>Jurgen Goering<BR>Piano Forte Supply<BR>(250) 754-2440<BR>info@pianofortesupply.com<BR>http://www.pianofortesupply.com<BR><?/smaller> <BLOCKQUOTE><BR>Alan,<BR>Thanks for the copy of the instructions.<BR><BR>The first time I heard of raising the backchecks was from Scott Jones<BR>teaching at a regional seminar. I think he also talked about using a snap<BR>ring pliers. Kevin Stock, also with S&S for a time, had a modified snap<BR>ring pliers with a slot cut out for the wire. He would just lift them, then<BR>even them out. I think that's because he knew what he was doing<BR>intuitively. It was Roger Jolly that I first heard put some numbers which I<BR>need with the idea;.... tail arc radius at 1/2 the hammer hanging distance<BR>(usually right around 2 1/2), shank intersecting roughly the top 1/3 of the<BR>backcheck (this does not need to be fussed with if the hammer line gets<BR>raised from filing or whatever), and the backcheck angled back 18 degress<BR>from vertical (pretty similar to the 68 or 70 degrees you work from, just<BR>different point of reference and 4 deg. different). I always enjoy hearing<BR>the different approaches to the same thing, because not all things work the<BR>same for everyone, (not wrong, just different) and it is also good to get<BR>something reaffirmed by a seperate source. A different perspective can<BR>turn the light bulb on.<BR><BR>Tim G<BR> <BLOCKQUOTE><BR>Attached is a S&S document about installing backchecks.<BR><BR>Have a great break!<BR><BR>Alan<BR><BR></BLOCKQUOTE></BLOCKQUOTE></BLOCKQUOTE></BODY></HTML>