Frank,
Thank you for sharing us from your experience.
What's the boom lenght of the new WARC-7 beam ?
Congratulation good K7K operation.
73 de Morel, 4X1AD
> ----------
> From: Frank R. Smith[SMTP:ah0w@pop.primenet.com]
> Sent: þéåí øáéòé 22 àå÷èåáø 1997þ 00:01
> To: dx@ve7tcp.ampr.org?;? topband@contesting.com
> Subject: [DX] FORCE-12 ANTENNAS
>
>
> DX Friends:
>
> At the risk of upstaging any of Force-12's own material about
> a new Force-12 antenna, their new WARC-7, I wanted to make a few
> of my own comments in behalf of the K7K Kure DXpedition team.
>
> We were very lucky to have received Force-12's new WARC tribander
> just in time for our DXpedition departure. Constructed using
> linear loading on three elements, the beam consists of 7 elements,
> 2 on 30, 2 on 17 and 3 on 24.
>
> As with other Force-12 beams, the antenna is quick and easy to
> put together. In fact, we had lost the instructions, and due
> to our familiarity with constructing other Force-12's and thanks
> to clear marking on factory-installed element mounting brackets,
> Andy UA3AB and I were able to put the antenna together without
> instructions. The whole process took us less than one hour and
> we had the beam up on a mast and on the air.
>
> In assembling the elements themselves, it is a total impossiblity
> to couple the aluminum tubes incorrectly. Each juncture requires
> rivets into factory pre-drilled openings with a unique pattern of
> rivet openings at each juncture. If you get the tubes backwards,
> the rivets won't match. And unlike other antennas, there's
> absolutely no need for a measuring tape and the frustration of
> using stubborn hose clamps.
>
> Putting the WARC-7 on the air, of course, is the most important
> test. The antenna was especially effective on 10.1 and 18 mHz
> especially
> since that's where the propagation was favorable (for us), but upon
> QSYing to 24 mHz we had very good signal reports. But "good"
> is a weak word here. Reports were consistent that the signals on
> these bands were among the strongest. We would become accustomed to
> hearing very nice adjectives like "fabulous signal", "one of the best
> on 18 I've ever heard," "a true twenty over", etc.
>
> And all this with relatively low power!
>
> The only problem we encountered with the antenna was a male Frigate
> bird who took a liking to the reflector and decided to make the
> WARC-7 his new perch on Kure. No amount of shaking and rotating
> would dislodge the stubborn bird. The second nighttime of the
> operation, the Frigate bird landed onto the antena with such force
> that the antenna shifted inside the mounting bracket leaving the
> antenna somewhere between horizontally and vertically polarized!
> But it still worked great.
>
> If anyone reading this is considering a new WARC antena, we'd
> recommend serious consideration of tihs new Force-12 WARC-7 beam.
> We've got several orders of our own in already so you'll have to
> get in line!
>
> 73
>
> Frank Smith AH0W/OH2LVG
> Midway-Kure DX Foundation
>
>
> ----
> Forwarded via the Internet DX Mailing List
> Submissions: dx@ve7tcp.ampr.org
> Subscribe/unsubscribe requests: dx-REQUEST@ve7tcp.ampr.org
> DX info on the Web: http://ve7tcp.ampr.org/DX/
>
--
FAQ on WWW: http://www.contesting.com/towertalkfaq.html
Submissions: towertalk@contesting.com
Administrative requests: towertalk-REQUEST@contesting.com
Problems: owner-towertalk@contesting.com
Search: http://www.contesting.com/km9p/search
|