<!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 6.00.2900.2668" name=GENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=#ffffff> <DIV><FONT face=Arial size=2>Hi Joe,</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>You would have to move = the side supports closer to the plunger on David's gauge, so that they are spaced the = width of the bridge or less.  For instance, just make a base that has supports = 1/2" on each side of the plunger.  Place the plunger on the = string just adjacent to a bridge pin.  Then use these formulas:</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2> <DIV><FONT face=Arial size=2>A = angle of deflection</FONT></DIV> <DIV><FONT face=Arial size=2>d = deflection</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial color=#ff0000 size=2><STRONG>A = d / .00437</STRONG></FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial color=#ff0000 size=2><STRONG>d = A * .00437</STRONG></FONT></DIV> <DIV><STRONG><FONT color=#ff0000></FONT></STRONG> </DIV> <DIV>You can also use the depth plunger on a small pair of digital calipers.  Make a "base" for the thing similar to David's, except = with 1/2" spacing.  Zero the scale, then measure.  The value will be = negative, but that's OK.</DIV> <DIV> </DIV> <DIV>Peace,</DIV> <DIV>Sarah</DIV> <DIV> </DIV> <DIV> </DIV> <DIV><STRONG><FONT = color=#ff0000></FONT></STRONG> </DIV></FONT></DIV> <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=joegarrett@earthlink.net = href="mailto:joegarrett@earthlink.net">Joe Garrett</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> Wednesday, July 06, 2005 = 2:41 AM</DIV> <DIV style="FONT: 10pt arial"><B>Subject:</B> Re: Reading a dial = gauge</DIV> <DIV><BR></DIV> <DIV><FONT face=Arial size=2>Hmmm? all very interesting, = indeed! </FONT></DIV> <DIV><FONT face=Arial size=2>NOW, how's about the possibility of = measuring the front angle and the back angle???? It seems logical that one could run = the center foot of the gauge to the front pin, leaving the back foot at = the back bridge pin and the front foot all the way out on the speaking length. = Reverse this and you get another reading off the back scale. Is this a = feasible way to calc both of those angles?</FONT></DIV> <DIV><FONT face=Arial size=2>Inquiring minds want to know!!!<G></FONT></DIV> <DIV><FONT face=Arial size=2>OR: perhaps put the plunger = at one end, 1" from the  two solid feet, 1" apart that both sit on the flat of = the bridge? Hmmm? (as the king of siam said: "is a puzzlement!"<G>)</FONT></DIV> <DIV><FONT face=Arial size=2>Regards,</FONT></DIV> <DIV><FONT face=Arial size=2>Joe Garrett, R.P.T.<BR>Captain, Tool Police<BR>Squares R I</FONT></DIV></BLOCKQUOTE></BODY></HTML>