NEC-LIST: coffe-can model

I received a copy of the coffee-can model and checked it on NEC-2 (NWPro)
and on NEC-4(GNEC). It runs on NEC-4 but not on NEC-2. I did not check the
model line-by-line to see if anything in the commands used a NEC-4 format
that will not run on NEC-2, but a line-by-line analysis against the NEC-2
manual is advisable for anyone wishing to work with the model.

Suggestion 1: if you place a model on the web, please specify the core
within which it was generated, especially if the commands involve anything
more than standard GWs, etc. There are great differences in GH and subtler
ones in GM, etc.

Suggestion 2: run the model in the average gain test mode before publishing
or sharing it. The coffee-can model results in values between 1.8 and 2+
(where 1.0 is the ideal), depending on frequency, and diagnostics show many
inter-penetrating wire segments for just the GW section. By all accounts,
the results will be unreliable if and when one gets the model running,
regardless of issues surrounding the use of SP. (Of course, unreliable
model results do not mean that the antenna will not work as an antenna.
Rather, as novels used to say, any resemblance between the model and
antennas, living or dead, is purely coincidental.)

Regards,

L. B. Cebik

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