<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=Content-Type content="text/html; = charset=iso-8859-1"> <META content="MSHTML 6.00.2800.1106" name=GENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=#ffffff> <DIV><FONT face=Arial size=2>Let me see now.  If the radius of = the soundboard as measured underneath is 65 feet, then the radius on top = should be 65 feet plus .375 inch except for the edges which would be 65 feet plus = .375 minus .100.  Actually, it wouldn't truly be a radius since it is = not really a part of a circle.  I can't decide what kind of figure that = would be.  Oh! forget the whole thing.  You guys got too much time = on your hands.</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>Carl Meyer  Assoc. PTG<BR>Santa = Clara, California<BR><A href="mailto:cmpiano@attbi.com">cmpiano@attbi.com</A> = </FONT></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=davidlovepianos@earthlink.net href="mailto:davidlovepianos@earthlink.net">David Love</A> </DIV> <DIV style="FONT: 10pt arial"><B>To:</B> <A = title=pianotech@ptg.org href="mailto:pianotech@ptg.org">Pianotech</A> </DIV> <DIV style="FONT: 10pt arial"><B>Sent:</B> Thursday, December 19, = 2002 7:57 AM</DIV> <DIV style="FONT: 10pt arial"><B>Subject:</B> Re: Bridgetop = Extravaganza Revisited</DIV> <DIV><BR></DIV> <DIV><FONT size=2>Does that mean that you should add to the measured = crown when using the string test from underneath for the same = reason?</FONT></DIV> <DIV><FONT size=2></FONT> </DIV> <DIV><FONT size=2>David Love</FONT></DIV> <BLOCKQUOTE 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=Erwinspiano@aol.com href="mailto:Erwinspiano@aol.com">Erwinspiano@aol.com</A> </DIV> <DIV style="FONT: 10pt arial"><B>To:</B> <A = title=pianotech@ptg.org href="mailto:pianotech@ptg.org">pianotech@ptg.org</A> </DIV> <DIV style="FONT: 10pt arial"><B>Sent:</B> December 19, 2002 5:53 = AM</DIV> <DIV style="FONT: 10pt arial"><B>Subject:</B> Re: Bridgetop = Extravaganza Revisited</DIV> <DIV><BR></DIV><FONT face=arial,helvetica><FONT lang=0 face="Times New Roman" size=2 FAMILY="SERIF">In a message = dated 12/18/2002 6:11:40 PM Pacific Standard Time, <A = href="mailto:davidlovepianos@earthlink.net">davidlovepianos@earthlink.n= et</A> writes:<BR><BR> <BLOCKQUOTE style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #0000ff = 2px solid; MARGIN-RIGHT: 0px" TYPE="CITE"></FONT><FONT lang=0 style="BACKGROUND-COLOR: = #ffffff" face=Arial color=#000000 size=2 FAMILY="SANSSERIF">Subj: = <B>Re: Bridgetop Extravaganza Revisited </B><BR>Date: 12/18/2002 6:11:40 PM Pacific = Standard Time<BR>From: <A = href="mailto:davidlovepianos@earthlink.net">davidlovepianos@earthlink.n= et</A><BR>Reply-to: <A href="mailto:pianotech@ptg.org">pianotech@ptg.org</A><BR>To: = <A href="mailto:pianotech@ptg.org">pianotech@ptg.org</A><BR><I>Sent = from the Internet </I><BR><BR><BR><BR>Get two blocks of wood measuring = exactly 7" high.  Place them on the soundboard at opposite edges of = whatever part of the piano you want to measure.  Put a straight edge = across the top of the two blocks and at a point midway between the = blocks, measure the distance from the bottom of the straightedge to the soundboard.  Subtract that number from 7" and the amount left = over is the amount of crown.</FONT><FONT lang=0 = style="BACKGROUND-COLOR: #ffffff" face=Arial color=#000000 size=3 = FAMILY="SANSSERIF"><BR>  <BR></FONT><FONT lang=0 style="BACKGROUND-COLOR: #ffffff" = face=Arial color=#000000 size=2 FAMILY="SANSSERIF">David = Love</FONT><FONT lang=0 style="BACKGROUND-COLOR: #ffffff" face=Arial color=#000000 = size=3 = FAMILY="SANSSERIF"><BR>        =       Hi = Dave<BR></BLOCKQUOTE>        &nbs= p;  Not so.  In Steinway and other pianos the net result of the diaphramizing (panel thinning) can leave the board thickness at the = edges where the blocks are placed at .250 thick and the middle of the = board can be as much or more than 100. thicker. Even with a flat board this = method of measuring crown would give a false reading as the middle of the = board will always be thicker (higher) than the edges. If you use this method = you've got to factor this in.<BR>       Dale Erwin<BR></FONT><FONT lang=0 style="BACKGROUND-COLOR: #ffffff" face="Times New Roman" color=#000000 size=2 FAMILY="SERIF"><BR></BLOCKQUOTE></BLOCKQUOTE></FONT></FONT></BODY></HTM= L>