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.
For spots, please go to your favorite
ARC V6 or VE7CC DX cluster node.
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|