In a message dated 97-03-23 21:38:20 EST, firstname.lastname@example.org writes:
> Anyone have any experience with the F-12 ZR-3 vertical which is
> advertised in the April QST? Claims 93% efficient (???)
> I've got severe restrictions regarding antennas outdoors (which I
> ignore for dipoles but can't ignore to the tune of a yagi unless I
> want to move, and given a location on a ridge top 600 ft ASL, 1/2
> mile from the ocean, I'm not about to do that).
While I haven't used one directly myself, I am familiar with the ZR-3.
The reason that it is rated at 93% efficiency is that it is basically
full-sized vertical dipoles. They are bent in the flat-top configuration
illustrated in the catalog, thus reducing the overall height of the antenna.
The advantages include:
* Increased efficiency over a conventional trapped vertical (NO traps!)
* Increased bandwidth over a trapped vertical
* True "NO radials required" (it's a dipole, remember?)
* Full legal limit (and more) power handling capability
* Can be mounted at any height (2 feet off the ground minimum)
If I was in the market for a vertical, I'd get one of these in a New
York second. TOWER TECH is a Force 12 dealer.
73, Steve K7LXC
TOWER TECH -- professional tower supplies for amateurs
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