-.-. --.- wrote:
Hello,

googling about "underground antenna", i found this article:
http://www.caves.org/section/commelect/nec-4/nec-4.html
that talk about a version of NEC capable to modeling under-the-ground wires.
IIRC also Roy W7EL write down months ago something about this, and about the
why the NEC capable of this kind of modeling (buried wires and so on) is not
released to the general public. Roy, if you gently can re-explain to me this
i'll be grateful.

Just for my personal information, wondering if someone played with buried or
submersed antennas and (especially from 40 meters going lower in frequency)
get some interesting result.

Thanks for reading and for replies, and as usual sry for my poor english.

-.-. --.- , Italy.

NEC-4 is capable of modeling buried wires, and NEC-4 is available to the
public. For information about purchasing NEC-4 see
https://ipo.llnl.gov/?q=technologies...ware-app&s=NEC.

Roy Lewallen, W7EL

Roy Lewallen wrote:
-.-. --.- wrote:
Hello,


-.-. --.- , Italy.

NEC-4 is capable of modeling buried wires, and NEC-4 is available to the
public. For information about purchasing NEC-4 see
https://ipo.llnl.gov/?q=technologies...ware-app&s=NEC.

Roy Lewallen, W7EL


I like the whole part of the form where I had to certify that I wasn't
doing nuclear weapons design, nor was I planning on using NEC4 for the
design, development, production, stockpiling, or use of chemical or
biological weapons.

They apparently don't care if I do those things, I just might not be
able to use NEC4 in the process.

Jim Lux wrote:

I like the whole part of the form where I had to certify that I wasn't
doing nuclear weapons design, nor was I planning on using NEC4 for the
design, development, production, stockpiling, or use of chemical or
biological weapons.

They apparently don't care if I do those things, I just might not be
able to use NEC4 in the process.

The only important thing is that you *say* you're not doing those
things. We all know that nuclear, chemical and biological weapons
developers would never lie about what they're doing.

But this is a big step beyond how things used to be. Until a few years
ago, NEC-4 could be sold only to people who said they were U.S. citizens
for use in the U.S. So it was trivial for any potential enemy to get the
program which could be carried anywhere in the world on a floppy disk in
a shirt pocket, or even sent by email. In the meantime, users in
friendly countries had to apply for an exemption via diplomatic
channels. I know of at least one case where this was done, and approval
took several years.

Roy Lewallen, W7EL