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Author Topic: hygain av 18vs  (Read 5442 times)
WW5AA
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Posts: 2088




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« Reply #15 on: July 13, 2010, 06:04:41 AM »

OOOoopppsss WX7G Shocked
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K0BG
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Posts: 9839


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« Reply #16 on: July 13, 2010, 07:36:05 AM »

Dave's advice about radial length might be a tad off, but not by much. I'd even say it would result in less ground losses than the majority of the radial fields in use. After all, as already mentioned, the resonant point of ground-based radials changes almost constantly (due to moisture content, soil types, etc.).

His reference to Rudy's series of articles is no doubt the best advice any amateur will ever receive. The articles cover real-world measurements, not something calculated by a modeling program. They also dispel all of the anecdotal information about radial length (elevated or ground mounted), some of which is repeated above.

The av18vs is a base loaded vertical. Although it will cover 80 through 10, you have to change the inductor tap when you change frequencies/bands. The 6 BTV, in this respect, is a better choice, and one almost as invisible. But it too requires radials, and any 1/4 wave vertical does, regardless of how it is mounted.
« Last Edit: July 13, 2010, 07:55:53 AM by Alan Applegate » Logged

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