Chuck wrote:


I've been looking through your Ver. 3 manual
and I cannot find any reference to non-
radiating networks: two-port network
specification (NT)) or the thin-wire option: the
Extended Thin-Wire Kernel (EK). Nor do I
see these functions in your control panel.

The extended thin wire kernel is invoked automatically when the model is
such that it's needed, according to the criteria given in the NEC
manual. Two port networks are used by EZNEC only to create current
sources and transmission lines.

In looking through the NEC2d docs, my
concern regarding NEC's ability to 'see'
"induced current at one or more points in a
structure" has been put to rest. However, in
Section V of the NEC2d docs (p 62), quite a
lot of attention is given to (1) source
modeling and (2) nonradiating networks.
. . .

I'm glad you've finally looked in the manual to correct your
misconceptions about the NEC transmission line model.

All EZNEC seems to offer ITR, are
simple transmission line simulations where
the fed (source) energy is applied to a
segement (load).

In the Transmission Lines window, the user specifies which wires the two
ends of the transmission line are connected to. There's no requirement
that one be a "source" or one a "load". These use the NEC network model,
as does NEC.


Figure 20 (p 69) and Figure 21 (p 70)
and the related discussion, make clear that
NEC can model parallel elements coupled
through a 2-port network (simulated bi-
directional transmission line).

Since your control center appears to not
utilize 2-port networks, it is no wonder your
software fails to agree in some instances
with empirical data.

Huh?

I'm always interested in hearing of any case where EZNEC disagrees
significantly with NEC-2 for any model, and I'm not aware of any such
cases. Anyone seeing such disagreement is encouraged to contact me.
Please include both the NEC and EZNEC models.


You are, however, obligated to provide
ALL of the NEC capabilities in your
software!

No, Chuck, I'm not obligated to do anything you say. Anyone not
satisfied with the capabilities of EZNEC is encouraged to not purchase
it. I guarantee that anyone who does purchase it will be satisfied.

If, in your closed-minded ignorance, you
wish to call critical coupling a
"pseudo-scientific" theory, so be it. But in
doing so, you leave me wondering if,
perhaps, some concepts simply lay
beyond your ability to visualize.

Indeed. I also have trouble with Chi, the healing power of crystals,
astrology, homeopathy, reflexology, phrenology, and water witching.
Believers in those things say exactly the same thing about me, so surely
you must be right. Guilty as charged.

Roy Lewallen, W7EL