On Mon, 27 Jun 2005 00:33:52 -0700, Roy Lewallen
wrote:

Owen wrote:
. . .
This leads me to think that measurement of the imbalance current at a
single point might not give the "big picture". I found scenarios where
inserting an imperfect balun increased the current at a point (it
changed the magnitude of the standing wave and more importantly moved
the current minimum), so I could see someone with a handy-dandy
current probe measuring such a situation and insisting they have proof
the baluns don't "work".

This situation lends itself well to modeling, where it's readily
illustrated. While it's often difficult to exactly model a given
physical setup, modeling allows us to control the variables and clearly
see what's happening. We can often apply this knowledge and insight to
real situations.


Exactly. Nothing I wrote was intended to comment adversely on your
quoted paper, it is interesting and relevant... just a pity the
results tables are not 100% legible.

Modeling shows me the risks of single point measurement, and I agree
entirely with your final statement "While it's often difficult to
exactly model a given physical setup, modeling allows us to control
the variables and clearly see what's happening. We can often apply
this knowledge and insight to real situations". A whole lot of insight
can be gained in a very short time.

Owen

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