there is an article (in russian - http://dl2kq.de/ant/3-33.htm) on
DL2KQ website with MMANA/NEC2 computer analysis of vertical of various
length like 1/8, 1/4 and 5/8 with radials like 1/10, 1/4 and 1/2 above
different soil.
Depends on your soil and vertical height there is different number of
radials of different length you need to put.
If you have, for example, 1/8 vertical on medium or good soil you need
more then 16...32 radials of 1/4 to work better than the same number
of short 1/10 radials.
K2BB
2008/3/14, Bill Turner <dezrat@copper.net>:
> ORIGINAL MESSAGE:
>
> On Fri, 14 Mar 2008 16:20:13 -0700, "Tom Osborne" <w7why@verizon.net>
> wrote:
>
>
> >Is it true that my radials only need to be around 100 feet long instead of
> >125 for full sized 160 meter radials or is that an old wives tale? 73
> >Tom W7WHY
>
>
> ------------ REPLY FOLLOWS ------------
>
> Well, yes and no.
>
> If the radials are laid directly on the earth, length is much less
> critical than if they were up in the air, as in a counterpoise. The
> missing few feet in your case will be made up by the earth itself, but
> having almost a full 1/4 wavelength of radials, you may not notice much
> difference. I'd go ahead and try it.
>
> 73, Bill W6WRT
>
>
>
>
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