<HTML style="FONT-SIZE: x-small; FONT-FAMILY: MS Sans Serif"><HEAD> <META http-equiv=Content-Type content="text/html; charset=windows-1251"> <META content="MSHTML 6.00.5730.11" name=GENERATOR></HEAD> <BODY> <P> <DIV>Ric said: "<FONT size=+0>The two variants I'm looking at were calculated by two different </FONT> <DIV><FONT size=+0>scalers, both taking into account for Pure Sound density.... but using </FONT></DIV> <DIV><FONT size=+0>unfamiliar formulas for scaling programs. The one is just a program </FONT></DIV> <DIV><FONT size=+0>that is no longer available (the one that uses the Harmonicity </FONT></DIV> <DIV><FONT size=+0>parameter), and the other by a fellow recommended by Pure Sound.</FONT></DIV> <DIV><FONT size=+0></FONT> </DIV> <DIV><FONT size=+0>I'm putting the numbers in the spreadsheet type that comes down from the </FONT></DIV> <DIV><FONT size=+0>Calculating Technician. Reading both the articles and the accompanying </FONT></DIV> <DIV><FONT size=+0>documentation, there is no explanation as to where this figure is to go </FONT></DIV> <DIV><FONT size=+0>into the formula, or how it is to be translated to whatever measuring </FONT></DIV> <DIV><FONT size=+0>units are to be used.</FONT></DIV> <DIV><FONT size=+0></FONT> </DIV> <DIV><FONT size=+0>Take the Tension formula for example... in the T= ( fLd / K)^2 * (1+ </FONT></DIV> <DIV><FONT size=+0>A(D^2/d^2)-1). A is the value for wrap (no explanation given anywhere I </FONT></DIV> <DIV><FONT size=+0>can find as to how this is ascertained or what exactly it represents in </FONT></DIV> <DIV><FONT size=+0>terms of measuring units.... its just a number given) K is even less </FONT></DIV> <DIV><FONT size=+0>clear... it is defined as just a constant with no reference at all to </FONT></DIV> <DIV><FONT size=+0>what it stands for, let alone how to ascertain it.</FONT></DIV> <DIV><FONT size=+0></FONT> </DIV> <DIV><FONT size=+0>One is tempted without further ado to conclude that K is the mass </FONT></DIV> <DIV><FONT size=+0>coeficient... but how does one make sure its in the right units ?</FONT></DIV> <DIV><FONT size=+0></FONT> </DIV> <DIV><FONT size=+0>Taking the other form for T Rhodes gives in his execution of Roberts </FONT></DIV> <DIV><FONT size=+0>formulas you have T = 2(m/6)^2 *(Ld / 7.69)^2 * (1+A(D^2/d^2) -1)</FONT></DIV> <DIV><FONT size=+0></FONT> </DIV> <DIV><FONT size=+0>Here K is necessarilly manipulated so as to facilitate a different way </FONT></DIV> <DIV><FONT size=+0>of dealing with the frequency parameter... and its corresponding number </FONT></DIV> <DIV><FONT size=+0>is 7.69 Again no explanation is given so I dont know whether or not </FONT></DIV> <DIV><FONT size=+0>this is average density of the wire. And if it is... well then Juan </FONT></DIV> <DIV><FONT size=+0>gives 7.85... not 7.69</FONT></DIV> <DIV><FONT size=+0></FONT> </DIV> <DIV><FONT size=+0>So... if you know just where the average density parameter figures into </FONT></DIV> <DIV><FONT size=+0>this and the other formulas given by Roberts in the Calculating </FONT></DIV> <DIV><FONT size=+0>Technician... I'd realllllly like to know :)"</FONT></DIV> <DIV><FONT size=+0></FONT> </DIV> <DIV><FONT size=+0>Cheers</FONT></DIV> <DIV><FONT size=+0>Ric,</FONT></DIV> <DIV><FONT size=3>Not only am I a 'puter dufus, but math dufus as well. I'm going to forward this to Mark Gallant, (creator of Scale Master, the program that I use.). Perhaps he can shed some light on this. Of course there are a whole lot of other Math Whizes out there, that are welcome to chime in.<G></FONT></DIV> <DIV><FONT size=3>Best Regards,</FONT></DIV></DIV> <DIV> </DIV> <DIV> </DIV> <DIV>Joe Garrett, R.P.T.</DIV> <DIV>Captain of the Tool Police</DIV> <DIV>Squares R I</DIV> <DIV> </DIV> <P></P></BODY></HTML>