[TowerTalk] Anyone ever make large LOG antenna to cover 10-30?
Wed, 19 Sep 2001 13:56:04 -0500
We just installed large phased log system for Special Forces 3rd Group
at Ft. Bragg.
Has the info and some pictures.
> The Commo Section at our Da Nang Headquarters used a LARGE (emphasize L A R
> G E) LPA. Boom was about 64' and *appeared* to use Rohn 25 as the boom
> material!! I *think* the elements were all interconnected in a letter "Z"
> arrangement. It featured a "skirt" that extended freq coverage from 4 MHz
> to 30 MHZ. Looking back, I remember the "skirt" as a 'discone' arrangement
> extending from the top of tower (beneath the LPA) to the ground. I was only
> bootlegging back to the States then; I wasn't officially a ham and didn't
> pay that much attention. :-) [I can maybe find a picture if anyone is
> interested.] If you go to this web site
> http://home.earthlink.net/~specforces/index.html and choose the Company
> C link on the left, you will see some of our antenna field.
> The LPA was usually used by the RTTY section. The lowly CW operations
> section used the KWM-2A, 30L-1,and dipoles. RTTY, on the other hand, used
> the KWM-2A, the 30S-1, and the LPA. Every once in a while (while I was on
> the graveyard shift) I would reconfigure the equipment -- 30S-1 and LPA for
> me! I would call CQ de 3w8gb. The radio would go silent... even the static
> stopped. Another CQ would result in half the world calling me. My ERP?
> Oh, about 16Kw!! Musta sounded like the second coming of the Lord! ...from
> 3w8, a 'banned' country!! Did I work any of you guys??
> Nice intro to ham radio, huh? :-)
> Gary B
> 'RVN BTO'
> Jerry scribed....
> > The military and DoD use some humongous LPA's. As I recall, ours (Navy
> > Station) were good for 8-32 mhz. FAA also uses them. They are extremely
> > large and use a pretty good sized tower section for a boom. I think
> > and maybe several others make them. Don't remember how long the booms
> > but had to be at least 60'. BIG bucks to buy one, I suppose big bucks also
> > to build one. I never got a close look at the rotators, but I'd like to
> > one. These things had to weigh over a thousand pounds. If you build one
> > like some photos!
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List Sponsored by AN Wireless: AN Wireless handles Rohn tower systems,
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supporting towers up to 100 feet for under $1500!! http://www.anwireless.com
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