<!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 6.00.6000.16414" name=GENERATOR> <STYLE></STYLE> </HEAD> <BODY id=role_body style="FONT-SIZE: 10pt; COLOR: #000000; FONT-FAMILY: Arial" bottomMargin=7 bgColor=#ffffff leftMargin=7 topMargin=7 rightMargin=7> <DIV>Hi Dale,</DIV> <DIV> </DIV> <DIV>Could you or anyone else give me the lengths of the three gauges posted below. I made one a while back but now realize that I need different lengths. Great gauge for your toolkit and easy to explain to a customer.</DIV> <DIV> </DIV> <DIV>Jack Houweling</DIV> <DIV> </DIV> <BLOCKQUOTE style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 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> Friday, May 04, 2007 6:05 AM</DIV> <DIV style="FONT: 10pt arial"><B>Subject:</B> Re: Lowell Component Downbearing Gauge</DIV> <DIV><BR></DIV><FONT id=role_document face=Arial color=#000000 size=2> <DIV> <DIV> <STRONG><EM>Hi Paul </EM></STRONG></DIV> <DIV><STRONG><EM>  I totally get that & I was unclear. If the rear segment is traveling downhill from the aliquot to the rear bridge pin because of bridge slope then trying to measure bearing like this can also be fraught with errors. Or you can take it under advisement &  keep a wary eye on the results. </EM></STRONG></DIV> <DIV><STRONG><EM>   Enclosed is a picture of a bearing gauge I posted before. With this jig even if the rear string angle travels down to the rear pin the net over all bearing can still be ascertained. I'm still fiddling with the information this gives but one thing is for sure, if there is real & residual bearing in the piano it is easily visible, to you & your clients.</EM></STRONG></DIV> <DIV><EM><STRONG>I.e. hold the gauge at the speaking length pins & rock downwards so the rear touches the aliquot.  If bearing is present then a gap will be evident between the aliquot & the bottom of the gauge.  On a 5 inch string segment yielding a gap of .065 thous (as measured with the gauge in the picture) reveals that there is about 3/4 of a degree of residual net bearing.  Now this is a new board set up at 1 1/2 degrees. SO I'v squashed the board 3/4 of a degree. </STRONG></EM></DIV> <DIV><STRONG><EM>  I like this because it's quicker than the Lowell & more visual.  It may not tell you everything but it tells a huge story quickly. JMHO</EM></STRONG></DIV> <DIV><STRONG><EM>  Frank, you should like this as a quick visual of deflection.</EM></STRONG></DIV> <DIV><STRONG><EM></EM></STRONG> </DIV> <DIV><STRONG><EM> For accurate result the gauge must be held tightly against the pins on the front section while pivoting. I checked every piano in the rebuilders gallery in Rochester & all the pianos had significant bearing that was immediately obvious from the distance the gauge rocked. & some possessed more than 1 1/2 degrees. hmmm?</EM></STRONG></DIV> <DIV><STRONG><EM>  Dale Erwin</EM></STRONG></DIV> <DIV> </DIV> <DIV> </DIV> <DIV> </DIV> <DIV><IMG id=MA1.1178283915 style="WIDTH: 480px; HEIGHT: 360px" height=360 src="cid:004c01c791d9$42198d10$9e02a8c0@memegpjijkavri" width=480 vspace=5 DATASIZE="50231" comp_state="speed"></DIV> <DIV> </DIV> <DIV> </DIV> <DIV> </DIV> <DIV> </DIV> <DIV><IMG id=MA2.1178283915 style="WIDTH: 480px; HEIGHT: 360px" height=360 src="cid:004d01c791d9$42198d10$9e02a8c0@memegpjijkavri" width=480 vspace=5 DATASIZE="58893" comp_state="speed"></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> <DIV>Dale:</DIV> <DIV> </DIV> <DIV>I'm not picturing what you're trying to describe. "The rear foot of the gauge"? <STRONG>Both feet </STRONG>of the gauge sit on the "duplex" segment when you're measuring it, just as <STRONG>both feet</STRONG> of the gauge sit on the speaking length when making that measurement. Are you suggesting that the "front foot" when measuring the backscale is on the bridge and the rear foot is off--on the backscale string? This would an incorrect use of the tool, and fraught with error. After zeroing out the gauge on the bridge top (now that's a measurement that's fraught with error as well; if anyone assumes that the bridge top is all in the same plane, then there's a big mistake being made), the gauge is moved wholly to the front scale in front of the front bridge pin for a measurement and then wholly to the back scale behind the rear bridge pin for measurement, and the two combined yield a "net" bearing. Am I misunderstanding you? As dull-witted as I am, it wouldn't surprise me.</DIV> <DIV> </DIV> <DIV>Paul</DIV></FONT></BLOCKQUOTE></DIV> <DIV></DIV> <DIV> </DIV></FONT><BR><BR><BR> <DIV><FONT style="FONT: 10pt ARIAL, SAN-SERIF; COLOR: black"> <HR style="MARGIN-TOP: 10px"> See what's free at <A title=http://www.aol.com?ncid=AOLAOF00020000000503 href="http://www.aol.com?ncid=AOLAOF00020000000503" target=_blank>AOL.com</A>. </FONT></DIV> <P> <HR> <P></P>No virus found in this incoming message.<BR>Checked by AVG Free Edition. <BR>Version: 7.5.467 / Virus Database: 269.6.2/787 - Release Date: 5/3/2007 2:11 PM<BR></BLOCKQUOTE><br><hr>I am using the free version of SPAMfighter for private users.<br />It has removed 1520 spam emails to date.<br />Paying users do not have this message in their emails.<br />Try <a href="http://www.spamfighter.com/len">SPAMfighter</a> for free now!<br /></BODY></HTML>