Topband: Lab style comparison results on 160m small lot antenna changes.

[Shoppa, Tim]

"Trust but verify".

As with SPICE or any other simulation program... garbage in, garbage out. An experienced antenna modeler knows what assumptions are good to make because of past verifications of results.

Modeling of ground conductivity and losses involves more assumptions than most of the wires/poles in the air (and you will note, is where most of the arguments are about!). And of course we can always argue about how many helicopters it takes to do the verification step :-)

Tim N3QE

-----Original Message-----
From: Topband [mailto:topband-bounces at contesting.com] On Behalf Of DAVID CUTHBERT
Sent: Friday, December 21, 2012 9:21 AM
To: Guy Olinger K2AV
Cc: TopBand List
Subject: Re: Topband: Lab style comparison results on 160m small lot antenna changes.

Guy,

why must we continually test NEC against measurements? The work by N6LF has shown great correlation between simulation and the real world.

Those of us who design electronic circuits (including EM) in the world of computer simulation have great faith in the various programs and NEC-4 (and possibly NEC-2) should give us an adequate A-B comparison.

        Dave WX7G
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Stew Perry Topband Distance Challenge coming on December 29th.