<!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 6.00.2800.1276" name=GENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=#ffffff> <DIV><FONT face=Arial size=2>My thinking is that the angle of = deflection of the speaking length and the hitch end, are more an indicator of down bearing = than is the segment that crosses the top of the bridge. Might be in error here = as this sure in not something that real experience has taught me = <G></FONT></DIV> <DIV><FONT face=Arial size=2>To me it is Plane Geometry, and I may = be looking at it from the wrong Angle.</FONT></DIV> <DIV><FONT face=Arial size=2>Why did I not purchase one of those = 'flame suits' when they were available. Conrad!</FONT></DIV> <DIV>Joe Goss <BR><A href="mailto:imatunr@srvinet.com">imatunr@srvinet.com</A><BR><A href="http://www.mothergoosetools.com">www.mothergoosetools.com</A></DI= V> <BLOCKQUOTE dir=ltr 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=davidskolnik@optonline.net href="mailto:davidskolnik@optonline.net">David Skolnik</A> </DIV> <DIV style="FONT: 10pt arial"><B>To:</B> <A = title=pianotech@ptg.org href="mailto:pianotech@ptg.org">Pianotech</A> </DIV> <DIV style="FONT: 10pt arial"><B>Sent:</B> Thursday, June 03, 2004 = 4:52 AM</DIV> <DIV style="FONT: 10pt arial"><B>Subject:</B> Re: consistent = downbearing measurements</DIV> <DIV><BR></DIV>Joe -<BR>Returning, for a moment, to the piano aspect = of this issue, what's your reason for bypassing the bridge?  You'd get = your net, though, in the case of a rounded bridge surface, you could get a false = zero or negative reading.  (I don't think you can get a false positive, = at least, I can't visualize it.) Also, you'd learn nothing about the individual = front and rear components.  That was part of my issue with John's = method.  He seemed to have little concern for other than the net bearing, and = even on that, he had some ideas I found somewhat troubling. Unfortunately, (or = maybe fortunately for me) he's no longer contributing to these lists, so = that's not an avenue to pursue.<BR><BR>As for using a laser,  you'd STILL = have to solve the stabilizing problem Greg spoke of.  Maybe you could = come up with a Rare Earth Universal Mount, with which you could use a Lowell = OR a Laser.  (LOLREUM!)  Are lasers affected by magnetic fields? <BR><BR>But mainly I'm interested with my first question...why no bridge?<BR><BR><BR>David Skolnik<BR><BR>At 04:42 PM 6/2/2004 -0600, = you wrote:<BR> <BLOCKQUOTE class=cite cite="" type="cite">Humm,<BR>why would = not a laser set on the string pointing at the rim, first measurment on the = speaking length and the second reading on the tail with the laser pointed at = the same target.  Bypass the bridge all together.<BR>Just = thinkin,<BR>Joe Goss<BR><A = href="mailto:imatunr@srvinet.com">imatunr@srvinet.com</A><BR><A href="http://www.mothergoosetools.com/" eudora="autourl">www.mothergoosetools.com</A> <DL> <DD>----- Original Message ----- <DD>From: <A = href="mailto:Erwinspiano@aol.com">Erwinspiano@aol.com</A> <DD>To: <A href="mailto:pianotech@ptg.org">pianotech@ptg.org</A> = <DD>Sent: Wednesday, June 02, 2004 3:53 PM <DD>Subject: Re: consistent downbearing measurements <DD>     Greg <DD>   Some techs do not rebuild but only use them to = see if there is any residual bearing left in the 90 year old almost flat = or flat  board. Under those conditions it's difficult to tell = anything with the gauge because of the bridge slope towards the rear & = a sunken crown/bridge as well  One gets really funky ideas of whats = there &  not there if you know what I mean. <DD> As to your useage , yes of course this what they're for. = I wasn't looking for trick answers. It would be nice if the gauge = were fashione from cast brass or iron for a more solid seat on the = string. <DD>  Dale <DD><FONT face=arial>Dale, = <DD><X-TAB>        </X-TAB>Uh, = I'm not sure what type of an answer your looking for here but I'll = take a stab at it. I'm needing to set plate height during the course of a = rebuild and check for down bearing during the course of evaluating a piano. = Isn't that what their for? <DD>Greg <DD>At 10:45 AM 6/1/2004, you wrote: <BLOCKQUOTE class=cite cite="" type="cite"> <DD>In a message dated 6/1/2004 5:23:38 AM Pacific Standard = Time, gnewell@ameritech.net writes: <DD>Thanks Dale. I've been doing just that but I'm not happy = with the repeatability of measurements. There's just got to be a better = way. Any other gauges out there? I seem to remember a Journal article = with a dial gauge of some kind. Am I dreaming? <DD>Greg = Newell<BR><BR></DD></BLOCKQUOTE></DD></DL>    Gregg</FONT></BLOCKQUOTE> <BLOCKQUOTE></BLOCKQUOTE></BLOCKQUOTE></BODY></HTML>