[TowerTalk] modeling compare: 80M, 2EL vs 4SQ

[David Gilbert]

Hhhmmm.  That seems backward to me.

I was always under the impression that radials improved the EFFICIENCY 
of a vertical antenna by providing a low loss return for near field 
currents, and that would seem to hold true whether the ground 
conductivity was "good" or not, since no way would typical ground 
conductivity ever approach that of a metallic conductor. Efficiency has 
very little to do with pattern.

I was also under the impression that radials have rather little effect 
on vertical pattern, since that is affected by ground conductivity many 
wavelengths away from the antenna.

73,
Dave   AB7E




On 3/15/2015 4:03 AM, Pete Smith N4ZR wrote:
> I think both John's and Gary's commemnts square with the series on 
> radials that was on NCJ a few years ago. The message I took away from 
> those articles is that if your actual ground characteristics are good, 
> the improvement with radials, no matter how many, will be quite 
> limited, while if your ground isn't good to start with, radials can 
> make a lot of difference in the pattern, especially at low angles.
>
> 73, Pete N4ZR
> Check out the Reverse Beacon Network at
> http://reversebeacon.net,
> blog at reversebeacon.blogspot.com.
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