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(Dick Pierce) wrote in message

It's not "useless" per se. It just is no more useful than a properly
done lumped-parameter model, is often times significantly more difficult
to use, even though it comes up with pretty much the same answers.
People on this forum and others have shouted mightely about how only
the transmission line model is any good, and then have utterly failed
to show ANY supporting data from the real word that supports such a
contention. One vocal and strident adherent of this view even said, in
effect, that real data has no relevance to his "theory."

I agree with you that a lumped element model is quite accurate. A true
transmission line model is just only *slightly* more accurate. But,
creating a true transmission line model is easy. One just enters (into
a computer) the length of cable, the characteristic impedance, and the
termination (load) impedance. What could be easier?

Do you actually believe that established transmission line theory is
not accurate? Do you required measured results before you will believe
it? It's good to prove all things. I'm sure if you test established
transmission line theory with measurements of your own, you will learn
a lot. :-)

Bob Stanton