I think it's a lot simpler than that.
There are so many varied interests in HF amateur radio that one antenna
scheme that satisfies all doesn't exist. It's all about individual
interests.
For this antenna, what was the designer's goals and does this design achieve
them? I suspect that with a far simpler array and a sacrifice of 3 dB of
gain, a far more practical antenna could have been built at much lower cost
and maintenance requirements that would be close enough. There would be no
sacrifice in receive capability. Control over radiation angle is FAR more
important than absolute gain, and given that array's design, the radiation
angle control is limited since it's too close to the ground for elevation
control to work as the designers expect, except maybe on 12 or 10 M.
You need roughly a minimum of 4 wavelengths above ground before the
reflection effects go away significantly to gain the advantage of free space
behavior where elevation control is meaningful. At the same time you also
give up the 6 dB of ground reflection gain. That crossover point is nebulous
and dependant on your terrain and ground conditions.
Bottom line is that there is no free lunch.....
Chuck..K1KW
----- Original Message -----
From: <HFDXJUNKIE@aol.com>
To: <towertalk@contesting.com>
Sent: Wednesday, November 22, 2006 7:56 PM
Subject: Re: [TowerTalk] Big Array
> I LOVE it!!! I want 2 !!! I have seen the pics long ago when it was
first
> brought up here on TT. There are just a lot of jealous people in this
world
> who put down a lot of things..WHY? Because they do not have it or can not
> afford it, and that's the bottom line. I had a guy (a HAM) telling me
the WARC
> bands are not real bands. WHY? because he had nothing very good to put
out a
> sig on them...now he does and is on them 24/7, same guy told me 6 and 2
is a
> techie band for chumps...he is still going crazy trying to get up a 6
meter
> beam.
>
>
>
>
> Pete
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|