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rightMargin=7><BR>Sorry for my ignorance but what is the=
"fish"?<BR><BR>David Ilvedson<BR><BR><BR><BR>
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Original message<BR>From: <ERWINSPIANO@AOL.COM><BR>To:=
<PIANOTECH@PTG.ORG><BR>Received: Thu, 17 Feb 2005 22:09:52=
EST<BR>Subject: Re: More CC vs RC questions was RE: Killer=
Octave & Pitch Raise<BR><BR><FONT id=role_document=
face=Arial color=#000000 size=2>
<DIV align=left>In a message dated 2/16/2005 12:19:41 A.M.=
Pacific Standard Time, davidlovepianos@comcast.net=
writes:</DIV>
<BLOCKQUOTE style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px;=
BORDER-LEFT: blue 2px solid"><FONT style="BACKGROUND-COLOR:=
transparent" face=Arial color=#000000 size=2>effect of softer=
hammer, softer panel, might produce a tone that while<BR>having=
adequate power (loudness) might not have the balance of=
partials<BR>to make the tone interesting, lively, expressive,=
you choose your<BR>favorite word<U>. So control of the=
panel's EMC, while seemingly not as<BR>critical for purposes of=
achieving stiffness in the assembly overall,<BR>might still be=
very critical in order to achieve a certain=
tonal<BR></U>balance.</FONT></BLOCKQUOTE>
<DIV> <FONT size=3>David</FONT></DIV>
<DIV><FONT size=3> I think this is possible & is my=
thinking. When panel compression exsists some dynamic=
tension between the rib being bent up a bit by the panel=
compression & the rib wanting to pull it back down=
creates continual static & dynamic reactive=
force. Perhaps some of this is healthy & building=
boards attempring to shape & mold certain=
characterisitcs is very interesting.</FONT></DIV>
<DIV><FONT size=3> I've been logging all the data per given=
board to keep track of the design parameters & then draw a=
conclusion based on the sound I get. Ie original rib=
width,height,length. New rib crown width ,new length, Panel=
thickness , tapering ,where & how much.=
Rib tapering etc.</FONT></DIV>
<DIV><FONT size=3> I installed the Mason board with cut-off,=
fish and altered rib heights & widths, weds. & when=
the clamp came off in the morning & it already had a=
very healthy & vibrant boom/rap even though the tight bond=
surely isn't thoroughly cured. This is not usually the case.=
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<DIV><FONT size=3> Dale</FONT></DIV>
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