You silly! Now we're really bass ackwards! No really, I just refer
     to this issue as Er (Relative Permativity or Effective Dielectric
     Constant). The variance(s) found are many. I believe that some of
     this "tweaking" to get the formulae to work may be due to the original
     Motorola MECL algorythms that were written back in time when big hugh
     (wide) traces were abundant and fast/clean PTFE samples were supplied 
     for test vehicles. (Or something like that) The success is all in not
     repeating the same mistake twice. <Take thorough 
     notes/libraries/archives>
     
     TTYL
     Groovy

______________________________ Reply Separator _________________________________
Subject: Re: Controlled Impedance
Author:  [log in to unmask] at SMTPLINK-HADCO
Date:    5/21/96 4:59 PM


                      Subject:                              Time:  1:14 PM
  OFFICE MEMO         RE>Controlled Impedance               Date:  5/21/96
     
If "dielectric constant" weren't a constant, we'd call it a variable wouldn't 
we? (;-)
     
So let's propose a new term "dielectric variable" -- or should that be 
"variable dielectric".  That might be better yet, then we could adjust the 
dielectric to fit our needs by stimulating the dielectric with frequency, 
temperature, humidity, pressure, voltage, material ratios,  etc.
     
Ralph