Cecil Moore wrote:

Yuri Blanarovich wrote:

It has been shown epxerimentally and also by EZNEC when modeled
properly as solenoid or loading stub. Yea, the "other" zero size coils
don't show that, EZNEC confirms that.


As a data point, the results of modeling a coil as a lumped
inductor Vs a helical coil are NOT the same in EZNEC. EZNEC
disagrees with itself.

I am much more inclined to trust the helically modeled inductance
than the lumped inductance.

As Dr. Corum says: "Distributed theory encompasses lumped circuits
and always applies." In other words, the Distrubuted network model
is a superset of the lumped circuit model.

There is no "helically modeled inductance" in Corum's work. They
specifically state that there is none. Instead, they use a substitute,
which Reg does, too, and develop their theory from there. Has it ever
occurred to you, Cecil, that just as lumped circuit analysis may not
be appropriate for everything due to its underlying assumptions, that
circuit theory may fail because you can't always reduce the electrical
world to current, voltage and length? When are you going to consider
field theory in your analysis, Cecil? It might come in handy in
any attempt to understand something as complex as a three dimensional coil.
73,
Tom Donaly, KA6RUH