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Old April 26th 07, 04:52 AM posted to rec.radio.amateur.antenna
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Default Need HF Antenna advice

On Thu, 26 Apr 2007 03:34:29 GMT, Owen Duffy wrote:

Danny Richardson wrote in
:

...
Works okay for me. Nice paper ( I stole the NEC deck).


Hi Danny,

You will see that the FR card has a symbolic variable for the frequency,
you will need to feed it a float value. (I used a PERL script to run a
series of models by tailoring the basic NEC deck, executing it, and
summarising the results.)

[snip]

Owen


No problem Owen, I'll use MultiNec which very easily allows me to run
"test cases" using variables with no programming required on my part.
G.

Danny




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Old April 26th 07, 05:06 AM posted to rec.radio.amateur.antenna
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Default Need HF Antenna advice

Danny Richardson wrote in
:
....
No problem Owen, I'll use MultiNec which very easily allows me to run
"test cases" using variables with no programming required on my part.


Ok. There are other tools that allow symbolic variables, and of course NEC
allows specification of a range of frequencies on the FR card.

The main reason for using PERL to build, run and sumamrise is the summarise
stage. At that point I merge the NEC output with real transmission line
models, L-tuner models etc... and without wading through 5MB of NEC output
by hand. The system view is a bigger picture than the NEC output.

Owen
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