<!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 6.00.2800.1226" name=GENERATOR> <STYLE></STYLE> </HEAD> <BODY style="FONT-SIZE: 10pt; FONT-FAMILY: Arial; BACKGROUND-COLOR: = #ffffff" bgColor=#ffffff> <DIV><FONT face="Comic Sans MS" color=#000080 = size=3></FONT> </DIV> <BLOCKQUOTE dir=ltr style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; = BORDER-LEFT: #000080 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> October 14, 2003 8:19 = AM</DIV> <DIV style="FONT: 10pt arial"><B>Subject:</B> Re: soundboard = stresses</DIV> <DIV><BR></DIV> <DIV> <DIV>In a message dated 10/13/2003 10:02:04 PM Pacific Daylight Time, = <A href="mailto:pianobuilders@olynet.com">pianobuilders@olynet.com</A> writes:</DIV> <BLOCKQUOTE style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: blue 2px = solid"> <BLOCKQUOTE dir=ltr style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; = BORDER-LEFT: #000080 2px solid; MARGIN-RIGHT: 0px"> <DIV><BR></DIV> <DIV><FONT face="Comic Sans MS" color=#000080 size=3>But = pressed into curved cauls. The effect on the soundboard panel is the same as if = it were pressed at a somewhat lower MC.</FONT></DIV></BLOCKQUOTE> <DIV dir=ltr><FONT face="Comic Sans MS" color=#000080 size=3></FONT> </DIV> <DIV dir=ltr><FONT face="Comic Sans MS" color=#000080 size=3>Del</FONT></DIV></BLOCKQUOTE></DIV> <DIV><FONT face="Times New Roman" color=#000040>  <FONT size=3><STRONG> I'm assumning you're speaking of simply stretching = the panel since spruce does seem to have quite an ability = to flex across grain. Even so it seems that it would have to be a fairly steep caul = to make much difference. Just holding small left over pieces of board in = hand and bending them into tight radii to see how much they'll bend before breaking is one of my personal favorite recreational shop = sports. We all take turns and keep score & the loser gets to buy lunch.     </STRONG></FONT></FONT></DIV> <DIV><FONT face="Times New Roman" color=#000040 size=3><STRONG></STRONG></FONT> </DIV></BLOCKQUOTE> <DIV dir=ltr><FONT face="Comic Sans MS" color=#000080 size=3>No. = I meant the amount of compression on the soundboard panel for a given amount of = crown. Regardless of whether it is obtained by drying the board down 4% and = gluing the thing up flat or drying the panel down to 5% and gluing into a curved = caul, compression crowning is compression crowning.</FONT></DIV> <DIV dir=ltr><FONT face="Comic Sans MS" color=#000080 = size=3></FONT> </DIV> <DIV dir=ltr><FONT face="Comic Sans MS" color=#000080 = size=3>Del</FONT></DIV> <BLOCKQUOTE dir=ltr style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; = BORDER-LEFT: #000080 2px solid; MARGIN-RIGHT: 0px"> <DIV><STRONG><FONT face="Times New Roman" color=#000040 size=3></FONT></STRONG> </DIV></BLOCKQUOTE></BODY></HTML>