Jim, I've looked at your stuff in the past.
But, "improvement" is in the eye of the beholder. The ionosphere determines the
optimum TOA, not the antenna. Taking heroic measures to get the max TOA down to
10 degrees (a near impossibility over dirt) when the signals are arriving at 45
degrees is hardly optimum.
Anecdotal evidence is mostly worthless but for what it's worth, I have 48
entities worked on 160 meters from here in the desert using no more than 500
watts into an inverted-V, apex at 45' ends at 6'. Everyone "knows" that this
can't possibly work because it radiates straight up. (Except that it doesn't)
Wes
On 7/13/2016 3:07 PM, Jim Brown wrote:
On Wed,7/13/2016 12:03 PM, Wes Stewart wrote:
Ok, but I'm unclear about what "improves radiation pattern" means.
Wes,
Take a look at the links I posted to my NEC studies. There can be no doubt as
to the meaning of "improves radiation pattern."
BTW -- I do NOT agree that elevated radials have much to do with establishing
the take-off angle. AND, more to the point, I view take-off angle as
absolutely the wrong way to look at the vertical pattern of an antenna. A FAR
better approach is the one I used in those antenna planning applications
notes, for which I posted links a few hours ago.
73, Jim K9YC
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[email protected]
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [email protected]
