<HTML><BODY BGCOLOR="#80ffff">In a message dated = 8/9/2002 5:14:28 AM Pacific Daylight Time, mcpiano@globetrotter.net writes:<= BR> <BLOCKQUOTE TYPE=CITE style="BORDER-LEFT: #0000ff 2px solid; MARGIN-LEFT= : 5px; MARGIN-RIGHT: 0px; PADDING-LEFT: 5px">Subj:RE: Mason&Hamlin A = board replacement Date:8/9/2002 5:14:28 AM Pacific Daylight Time From:<A HREF="mailto:mcpiano@globetrotter.net">mcpiano@globetrotter.net</A= > Reply-to:<A HREF="mailto:pianotech@ptg.org">pianotech@ptg.org</A> To:<A HREF="mailto:pianotech@ptg.org">pianotech@ptg.org</A> Sent from the Internet Thanks for the info,<= FONT COLOR="#000000" style="BACKGROUND-COLOR: #80ffff" SIZE=3 FAMILY= ="SANSSERIF" FACE="Arial" LANG="0"> Comments inserted below</FON= T> <BLOCKQUOTE TYPE=CITE sty= le="BORDER-LEFT: #0000ff 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px; P= ADDING-LEFT: 5px">-----Original Message----- From: owner-pianotech@ptg.org [mailto:owner-pianotech@ptg.org]On B= ehalf Of Erwinspiano@AOL.COM Sent: 8 août, 2002 11:06 To: pianotech@ptg.org Subject: Re: Mason&Hamlin A board replacement In a message dated = 8/7/2002 5:35:26 PM Pacific Daylight Time, mcpiano@globetrotter.net writes:<= BR> <BLOCKQUOTE TYPE=CITE style="BORDER-LEFT: #0000ff 2px solid; MARGIN-LEFT= : 5px; MARGIN-RIGHT: 0px; PADDING-LEFT: 5px">Subj:Mason&Hamlin A boar= d replacement Date:8/7/2002 5:35:26 PM Pacific Daylight Time From:<A HREF="mailto:mcpiano@globetrotter.net">mcpiano@globetrotter.net</A= > Reply-to:<A HREF="mailto:pianotech@ptg.org">pianotech@ptg.org</A> To:<A HREF="mailto:pianotech@ptg.org">pianotech@ptg.org</A> Sent from the Internet            Marcel</BLOC= KQUOTE>         It would be simple enough to discard the apron a= nd move the bass bridge forward as far as the plate will allow  which w= ould allow the backscale length some improvement. Yes, the bass strings woul= d be a bit shorter but you'd gain back scale length. The mono chord section = which needs it most desperately. The plate doesn't leav= e much room for discarding the apron. I would at the most gain about 2 cm.</= FONT></BLOCKQUOTE></BLOCKQUOT= E>    &= nbsp;   Marcel <>>>>>>>>>Yes but the backscale length is drea= dfully short now so any length is a help plus the rest of the bass could use= it too. I'd make a solid bridge and undercut some or all the portion under = the mono chords so that the end of the bridge doesn,t end up being glued so = close to the rim. Set it up with o bearing. Or all most <BLOCKQUOTE TYPE=CIT= E style="BORDER-LEFT: #0000ff 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0= px; PADDING-LEFT: 5px"><BLOCKQUOTE TYPE=CITE style="BORDER-LEFT: #0000ff= 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px; PADDING-LEFT: 5px">    &= nbsp; On one of the two As I did last year I did what I call a partial float= at the end of the tenor bridge which was done by drawing a line from one en= d of the maple cap piece on the board to the other end, installing a small r= ib on the bottom underneath the line and a thin maple strip over it on the t= op for a little reinforcing. I made the cut after the auxiliary ribs were on= .    <FON= T COLOR="#000000" style="BACKGROUND-COLOR: #80ffff" SIZE=3 FAMILY="= SANSSERIF" FACE="Arial" LANG="0"> What thickness  w= as your bottom rib (was this one spruce in the bottom) and the maple one on = top?</BLOCKQUOTE></BLO= CKQUOTE> >>>>>>>>>>Not thick 15 mm or less. Spruce on b= ottom. top cap about 3mm. It wasn't n= otched to the rim either.   By the way = this is a very easy modification its building the rest of it that's time con= sumning. know what I mean. It's also doing all the other things like thinnin= g the panel ,choosing an overall adequate panel thicknesses thinning more in= the tail and leaving adequate thickness in the treble. The ribs in the bott= om need some beefing up a couple mm or so. don't change the no. of ribs less= you have a real good plan as to why. The As a good piano. Crown your ribs a= t least 60ft. in the bottom and more into the treble etc. etc. etc.              Bes= t>>>>Dale Erwin>>>> <BLOCKQUOTE TYPE=CITE style="BORDER-LEFT: #0000ff 2px solid; MARGIN-LEFT= : 5px; MARGIN-RIGHT: 0px; PADDING-LEFT: 5px"><BLOCKQUOTE TYPE=CITE style= ="BORDER-LEFT: #0000ff 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px; PAD= DING-LEFT: 5px">     I'm not advocating any one do this but just sharing my= own journey. I'm sure there are other ideas and methods that have more meri= t "floating" around in cyber space.       Dale Erwin    </BLOCKQUOTE> </BLOCKQUOTE> </HTML>