"Yuri Blanarovich" wrote in message
...
Reg wrote among other stuff:

You've been reading books and magazines about rules-of-thumb written
by old-wives. At 3.62 MHz and a radial length of 16 metres the
attenuation approaches 100 decibels. So there's no current flowing in
the radials beyond 5 metres. You can remove the excess 12 metres.
They are not doing anything. What small current density there is
beyond 5 metres is all flowing in the soil. The cross-sectional area
of the soil carries the small current just as well as the radials.

==========================================
Yes. Use the program to calculate efficiency with the extra 20
radials. Assume all the radials are 5 metres long. But you may not
think the meagre 3% or 0.13dB in efficiency is worth all the labour
and back-ache. By now you are beginning to appreciate how useful the
program is.
==========================================

Reg,

NEC4 engine can accommodate on the ground or buried radials in modeling
and calculating vertical antenna parameters and performance.

I bet Roy has his hair standing up, or perhaps still trying to recover
from the "appreciation" of your program, unless he is still running
calculations :-)

You are trivilializing, ignoring 100 years or so of vertical antenna
research, measurements and misleading innocent users of your program. You
might be right in calculating the resonant frequency of piece of wire in
the dirt, but that is far from its contribution to the vertical antenna
performance and efficiency.
You better switch to some better quality vino and read up on the subject.
:-)


Yuri K3BU

Has anybody confirmed the "on-ground" accuracy of NEC 4? Cebik
has published conflicting statements regarding this capability.

Frank