<HTML><HEAD>
<META charset=UTF-8 http-equiv=Content-Type content="text/html; charse=
t=utf-8">
<META content="MSHTML 6.00.2730.1700" name=GENERATOR></HEAD>
<BODY style="FONT-SIZE: 10pt; FONT-FAMILY: Arial; BACKGROUND-COLOR: #fffff=
f">
<DIV>
<DIV>In a message dated 10/13/2003 10:19:04 AM Pacific Daylight Time, michae=
l@gambles.fsnet.co.uk writes:</DIV>
<BLOCKQUOTE style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: blue =
2px solid">
<DIV><FONT face=Arial size=2>Hello all</FONT></DIV>
<DIV><FONT face=Arial size=2>Since the last <U>stab</U> at RC vs CC got =
so hot under the collar and the knives were clearly out, let's try going bac=
k to fundamentals. Just how <U>thick</U> is a soundboard? Is the thick=
ness related to the area? Presumably the number of ribs are related to the a=
rea? Is it curved on both sides like a violin?..... OK?</FONT></DIV>
<DIV><FONT face=Arial size=2>Regards to all</FONT></DIV>
<DIV><FONT face=Arial size=2>Michael </FONT></DIV></BLOCKQUOTE></DIV>
<DIV><FONT face="Times New Roman" color=#000040> <FONT size=3><S=
TRONG>Michael</STRONG></FONT></FONT></DIV>
<DIV><FONT face="Times New Roman" color=#000040 size=3><STRONG> =
Since no o<FONT color=#000000>n</FONT>e took a poke at this... There are n=
o hard and fast rules for sound board thicknesses. If you took out the old b=
oards in 5 Steinways of any give model you'd find some way thicker or thinne=
r than the others but with a general range or parameter. I've measured a 70'=
s CD S&S B with a soundboard max. thickness of .310 in the middle as S&a=
mp;S & other are generally thinned around the edges for flexibility=
(diaphramized as S&S says) That would be considered thin for=
a B. On the other hand I've seem them as thick as .375 ish. The thin one so=
unded totally awesome & I was surprised it wasn't a "thin" sounding pian=
o. In my work I'd be using Sitka panels & opt for something a=
bout .340 to.360. For smaller models thinner is fine, .300 to .325ish. By th=
e way You own an A I'm told & I've found it common for them to be .=
350 ish. Ds & Mason BBs can be as thick as .400. Not sure this more=
than incidental trivia but you asked.</STRONG></FONT></DIV>
<DIV><STRONG><FONT face="Times New Roman" color=#000040 size=3> =
Regards--Dale Erwin</FONT></STRONG></DIV>
<DIV><STRONG><FONT face="Times New Roman" color=#000040 size=3></FONT>=
</STRONG> </DIV></BODY></HTML>