<HTML><FONT FACE=arial,helvetica><FONT SIZE=3 FAMILY="SERIF" FACE="Times New Roman Greek" LANG="0">In a message dated 3/22/2002 6:20:55 PM Pacific Standard Time, mfarrel2@tampabay.rr.com writes:<BR>
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<BLOCKQUOTE TYPE=CITE style="BORDER-LEFT: #0000ff 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px; PADDING-LEFT: 5px">Subj:<B>Interesting Old Soundboard </B><BR>
Date:3/22/2002 6:20:55 PM Pacific Standard Time<BR>
From:<A HREF="mailto:mfarrel2@tampabay.rr.com">mfarrel2@tampabay.rr.com</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>
Terry</FONT><FONT COLOR="#000000" style="BACKGROUND-COLOR: #ffffff" SIZE=2 FAMILY="SANSSERIF" FACE="Arial" LANG="0"></BLOCKQUOTE><BR>
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</FONT><FONT COLOR="#000000" style="BACKGROUND-COLOR: #ffffff" SIZE=3 FAMILY="SERIF" FACE="Times New Roman Greek" LANG="0"> >>>.. I've checked out a bunch too. The knabe as far as my observations go is the only upright I've seen with crowned ribs. This is dangerously thin but they obviously had a concept they were working.>>>>>..<BR>
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</FONT><FONT COLOR="#000000" style="BACKGROUND-COLOR: #ffffff" SIZE=2 FAMILY="SANSSERIF" FACE="Arial" LANG="0"><BLOCKQUOTE TYPE=CITE style="BORDER-LEFT: #0000ff 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px; PADDING-LEFT: 5px">I yanked the soundboard out of an old (qbout 1890) Knabe upright the other day. I've been looking at it since then and have started to wonder about it. Why did they make it the way they did? It is thin. Six millimeters thick along the long bridge, and thinned to 4.5 mm in the area of the bass bridge. Is this unusually thin? It had kinda hefty ribs, and quite some arc to them. After taking the ribs off the board, I see that most of them have about a 35 to 40-foot radius curve to them.</FONT><FONT COLOR="#000000" style="BACKGROUND-COLOR: #ffffff" SIZE=2 FAMILY="SANSSERIF" FACE="Arial" LANG="0"></BLOCKQUOTE><BR>
>>>>>>>>>>Thats really tight,how did you determine the radius>>>>>>>>>>><BR>
</FONT><FONT COLOR="#000000" style="BACKGROUND-COLOR: #ffffff" SIZE=2 FAMILY="SANSSERIF" FACE="Arial" LANG="0"> Amazingly tight. And they must have been subject to a fair amount of </FONT><FONT COLOR="#000000" style="BACKGROUND-COLOR: #ffffff" SIZE=2 FAMILY="SANSSERIF" FACE="Arial" LANG="0"><BR>
</FONT><FONT COLOR="#000000" style="BACKGROUND-COLOR: #ffffff" SIZE=2 FAMILY="SANSSERIF" FACE="Arial" LANG="0"><BLOCKQUOTE TYPE=CITE style="BORDER-LEFT: #0000ff 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px; PADDING-LEFT: 5px">compression crowning also because the back side of the ribs is curved quite a bit also, unless of course they cut/plane them that way. I thought all the old timers used 60-foot arcs?</FONT><FONT COLOR="#000000" style="BACKGROUND-COLOR: #ffffff" SIZE=2 FAMILY="SANSSERIF" FACE="Arial" LANG="0"></BLOCKQUOTE><BR>
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</FONT><FONT COLOR="#000000" style="BACKGROUND-COLOR: #ffffff" SIZE=3 FAMILY="SERIF" FACE="Times New Roman Greek" LANG="0">>>>>>>>.I'm not sure they gave it much thought>..----Dale</FONT><FONT COLOR="#000000" style="BACKGROUND-COLOR: #ffffff" SIZE=2 FAMILY="SANSSERIF" FACE="Arial" LANG="0"><BR>
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Boy, I can see that one could spend a lot of time on the back of soundboards getting to know them.<BR>
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Terry Farrell<BR>
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