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My opinion is that any HF antenna measurement, under the effective =
conditions in
wich radiator will be used and along XYZ planes, is extremely hard and =
expensive
to be realized, out of amateurs possibilities and probably not worhwile =
to anyone.
I'm wondering what's the matter to deal in such an imperfect job were =
environment limitations and instruments errors lead to huge mistakes, =
instead of trying it as an
accurate computer modeling.
Like it's now tipycal, because incomparably better, to model antennas =
instead of changing elements lenghts in an empirical "cut and try =
(measure)" process, the same has to be applied in evaluating HF amateur =
antennas performances, traps and loadings included.
The inevitable error in a correct modeling is probably much smaller than =
those ones occurring in creative but error-prone, fundamentally unreal =
or not useful , tests.
73,
Mauri I4JMY
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<BODY bgColor=3D#ffffff><BR>My opinion is that any HF antenna =
measurement, under=20
the effective<FONT color=3D#000000 size=3D2> </FONT>conditions =
in<BR>wich radiator=20
will be used and along XYZ planes, is extremely hard and<FONT =
color=3D#000000=20
size=3D2> </FONT>expensive<BR>to be realized, out of amateurs =
possibilities and=20
probably not worhwile to<FONT color=3D#000000 size=3D2> =
</FONT>anyone.<BR>I'm=20
wondering what's the matter to deal in such an imperfect job were<FONT=20
color=3D#000000 size=3D2> </FONT>environment limitations and instruments =
errors lead=20
to huge mistakes<FONT color=3D#000000 size=3D2>,</FONT> instead<FONT =
color=3D#000000=20
size=3D2> </FONT>of trying it as an<BR>accurate computer =
modeling.<BR>Like it's=20
now tipycal<FONT color=3D#000000 size=3D2>,</FONT> <FONT =
color=3D#000000><FONT=20
size=3D3>because</FONT></FONT><FONT size=3D3> </FONT>incomparably =
better<FONT=20
color=3D#000000 size=3D2>,</FONT> to model antennas instead of<FONT =
color=3D#000000=20
size=3D2> </FONT>changing elements lenghts in an empirical "cut and =
try<FONT=20
color=3D#000000 size=3D2> (<FONT size=3D3>measure</FONT>)</FONT>" =
process, the=20
same<FONT color=3D#000000 size=3D2> </FONT>has to be applied<FONT =
color=3D#000000=20
size=3D2> </FONT>in evaluating HF amateur antennas performances, traps =
and=20
loadings included.<BR>The inevitable error in a correct modeling is =
p<FONT=20
face=3D"" size=3D3>robabl</FONT>y much smaller than <FONT =
size=3D3>th<FONT=20
color=3D#000000>ose ones occurring </FONT></FONT>in<FONT color=3D#000000 =
size=3D2>=20
</FONT>creative but error-prone, fundamentally unreal<FONT =
color=3D#000000 size=3D2>=20
<FONT size=3D3>or not useful </FONT></FONT>, tests.<BR><BR>73,<BR>Mauri=20
I4JMY<BR><BR></BODY></HTML>
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