[600MRG] NEC modeling close to ground

[Edward R Cole]

Rudy,

Thanks for the link (saved for later reading).  Early advice I was 
given by this group to put up an inverted-L was good advice (even 
with limited area for ground plane).  The 90-9-1% rule in the article 
is kinda distorted, here.  Copper-clad steel wire was free.  I built 
my own loading coil for under $100 material.  Surplus NDB 100w PA 
cost $40 and driver cost $3K.  Of course it is the Rx as well 
(Elecraft K3 and a SDR-IQ).  When I can afford the new synth board 
upgrade it will enable use down to 472-KHz (currently limited to 
above 490-KHz).

Another rainy day (per usual fall wx in south-central coastal 
AK).  We have a saying that "fall rains until it turns to snow!"

73, Ed -KL7UW

At 08:30 AM 9/14/2015, Rudy Severns wrote:
>If you want to know how good NEC modeling is for wires close to or buried go
>to my web page, www.antennasbyn6lf.com <http://www.antennasbyn6lf.com>  ,
>and download the post on that subject.  It is a direct comparison between
>modeling predictions and careful experimental measurements of the same
>antennas.
>
>
>
>I think this work shows clearly that the primary limitation of NEC is the
>user not the software.  The latest versions,  NEC4.2,  do a very good job
>indeed.
>
>
>
>73, Rudy N6LF
>
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73, Ed - KL7UW
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