[Antennas] Re: Antennas Digest, Vol 40, Issue 7

Tue May 29 11:53:56 EDT 2007

Yep. Paint will help to protect the fiberglass from the uv rays.
What's interesting about fg is that the greatest amount of
deterioration actually occurs in the first year or so and the amount
it deteriorates over the next ten years or so is supposed to be
negligible, I'm not sure that my experiences confirm that.
I spray all of my antennas to make them less conspicuous and have
never found there to be any deterioration that I could determine.
Notice I said spray, and I use the cheap spray cans, generally flat
black or a combo of flat black, green and brown. They really blend in
with the foliage in the background and become almost invisible.
(stealth)
3db gain sounds right.
The optional radials. Hmm. If the antenna will be just over the roof
of the mobile home then you could scarcely get a better ground plane
than the roof itself. If the antenna is going to be located some
distance above the roof I would use the radials.
Garry/Ve7ajj
On 5/28/07, antennas-request at mailman.qth.net
<antennas-request at mailman.qth.net> wrote:
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>>> Today's Topics:
>> 1. a couple fiberglass antenna questions (Philip, KO6BB)
>>> ----------------------------------------------------------------------
>> Message: 1
> Date: 2007年5月28日 00:51:59 -0000
> From: "Philip, KO6BB" <ndb_fch-344 at sbcglobal.net>
> Subject: [Antennas] a couple fiberglass antenna questions
> To: "Antennas" <antennas at mailman.qth.net>
> Message-ID: <000501c7a0c26720ドルc950$6401a8c0 at ko6bb>
> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
> reply-type=original
>> Hi,
>> Today I snagged a 2 month old Solarcon A-99 antenna WITH the optional
> radials, at a very good price (40.00) Said antenna is going to replace my
> home-brewed 10M ground-plane (which uses my metal mobile home roof as a
> ground-plane). It will be primarily used for my 10 Meter beacon (running 20
> Watts from a Uniden HR-2600 24/7).
>> QUESTIONS:
>> 1. The AES catalog says the A-99 has about 3dbi of gain. Isn't that very
> close to what a full dipole has? It seems I recall a dipole having about
> 2.8 dBi gain or so. But then I may be full of hot air too ;-)
>> 2. How much do the optional radials improve performance on this particular
> antenna?
>> 3. Since I plan on leaving this antenna up for many years, and it's still
> like new, I'd like to protect the fiberglass from future UV damage. Will a
> good coat of Poly varnish or similar do this job? Or perhaps a can of gray
> Krylon spray paint would be better (and keep the white pole from sticking
> out like a sore thumb :) Is it likely that painting this thing would badly
> detune it? If it's likely to cause any problems I'll just keep it stock!
>> 73 de Phil, KO6BB
> DX begins at the noise floor!
>> Ten Meter CW Beacon KO6BB/B, 20 Watts 24/7 on 28.248MCs.
> THE BEACONEER'S LAIR: http://www.geocities.com/ko6bb/
> QSL GALLERY: http://photobucket.com/albums/f306/KO6BB/
> Merced, Central California, 37.3N 120.48W CM97sh
>>>> ------------------------------
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>>> End of Antennas Digest, Vol 40, Issue 7
> ***************************************
>