On 12/22/2010 5:46 PM, Al Williams wrote:
> I am surprised that YO or 4nec2 don't include actual current measurement
> in the parasitic elements.
4nec2 includes the nec2 output file with numbers if you want them.
I use File/Save Nec output file, then look at the file (after a calculate)
If you specify the voltage magnitude correctly on your input deck (assuming
that's how you drive the thing)..the numbers in the output are correct amps,
aren't they?
i.e. it looks like this. (these segs are tips..low current0
- - - CURRENTS AND LOCATION - - -
DISTANCES IN WAVELENGTHS
SEG. TAG COORD. OF SEG. CENTER SEG. - - - CURRENT (AMPS)
- - -
NO. NO. X Y Z LENGTH REAL IMAG.
MAG. PHASE
1 1 -0.2336 -0.0118 1.0088 0.01168 3.4782E-01 3.1149E-01
4.6691E-01 41.845
2 1 -0.2220 -0.0118 1.0088 0.01168 8.6683E-01 7.7849E-01
1.1651E+00 41.927
3 1 -0.2103 -0.0118 1.0088 0.01168 1.3280E+00 1.1962E+00
1.7873E+00 42.010
4 1 -0.1986 -0.0118 1.0088 0.01168 1.7632E+00 1.5929E+00
2.3762E+00 42.095
4nec2x also can generate plots of current mag/phase/real/img (from the
Geometry/plot). Those currents seem to track the "input power" setting. I'm not
sure how they are connected to the nec2 output file.
as a for instance:
for example, a 3 element 20 at 70', Zl=25, 1" Al, with an LC match
the plot shows current magnitudes: (max at center). 1500w input power
7.6 for the de
4.5 for the dir
3.1 for the ref
relatively, those numbers seem right. Absolute, maybe seems high..Not sure.
That doesn't seem to track changes to the voltage magnitude I use in the input,
but the nec2 output file does track the voltage magnitude I use on the input.
-kevin
ad6z
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