[Elecraft] Inverted-L (was OT: Vertical antenna)

Guy Olinger K2AV olinger at bellsouth.net
Tue Dec 21 10:45:34 EST 2010


Actually, a DENSE radial solution in the near field DOES return
dividends, even over poor ground.  The savings has to do with field
cancellation at the ground, caused by uniform radials and the vertical
radiator presenting equal and opposite fields to the dirt.  This
cancellation zone then "returns" the energy otherwise destined for
worm-warming to the system to be added elsewhere, including
proportionally to the sky wave.

73, Guy.

On Tue, Dec 21, 2010 at 1:33 AM, David Gilbert <xdavid at cis-broadband.com> wrote:
>
>
> I suspect that Don was referring to the fact that poor ground
> conductivity affected his low angle performance, and that is absolutely
> true.  There isn't a thing he or anyone else can do to change the far
> field effects of poor ground.  He can add lots of radials, buried or
> otherwise, to improve feedpoint losses, but none of that has any effect
> whatsoever on the far field pattern.
>
> 73,
> Dave   Ab7E
>
>
>
> On 12/20/2010 9:54 PM, Jan Erik Holm wrote:
>> I hope people doesn´t learn from this statement.
>> IMO this is as far from logic one can get.
>> /Jim
>> ------
>> On 2010-12-21 02:27, Don Wilhelm wrote:
>>> The ground conductivity in my area is not the greatest, so I have
>>> accepted the logical consequences of that fact.
>>>
>>> 73,
>>> Don W3FPR
>>>
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