[Elecraft] OT: Elevated vs. Buried Radials

[W4SK]

How can ya'll worry about this when the burning issues of free hats and 
discounts remain unsolved?
-W4SK
________________________________
John T. Gwin
jtgwin at comcast.net
JudgeJohnGwin at WilsonCountyTN.com
----- Original Message ----- 
From: "Ron D'Eau Claire" <ron at cobi.biz>
To: <elecraft at mailman.qth.net>
Sent: Saturday, May 18, 2013 2:31 PM
Subject: Re: [Elecraft] OT: Elevated vs. Buried Radials


> Joe, the article I referenced clearly said to use 1/4 wavelength radials
> when they are elevated. That's agrees with everything I've read and done
> over years as well.
>
> I'll stand behind that SteppIR article as showing how to put up a vertical
> that avoids the worst pitfalls. (And it's basically a repeat of what's in
> every Antenna Handbook I've read over the years.)
>
> Can one tweak it even further? Perhaps. The articles you reference study
> some ideal situations that most Hams cannot emulate that do so, especially
> in producing a perfectly omnidirectional pattern with a minimum of 4
> radials. And they confirm the basic rules covered in the SteppIR article.
>
> 73, Ron AC7AC
>
>
>
> -----Original Message-----
> From: elecraft-bounces at mailman.qth.net
> [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Joe Subich, W4TV
> Sent: Saturday, May 18, 2013 11:53 AM
> To: elecraft at mailman.qth.net
> Subject: Re: [Elecraft] OT: Elevated vs. Buried Radials
>
>
> The SteppIR information is overly simplified.  For the best current 
> analysis
> of elevated vs. on ground radials see the extensive data from N6LF -
> http://www.antennasbyn6lf.com
>
> In particular, read the comments on elevated radials:
> http://www.antennasbyn6lf.com/2011/02/comments-on-elevated-radials.html
> studies on ground systems:
> <http://www.antennasbyn6lf.com/2009/12/series-of-qex-articles-on-ground-syst
> em-experiments.html>
> and studies on elevated radial systems:
> <http://www.antennasbyn6lf.com/2012/02/elevated-radial-ground-systems-some-c
> autions.html>
>
> One of the major red flags with elevated radials - they must be a major
> fraction of a wavelength (1/8 wave is a good rule of thumb) before they
> really act independently of the "dirt".  Even then, nothing will reduce 
> the
> losses in the 1 to 10 wavelength area responsible for forming the low take
> off angle lobe.
>
> 73,
>
>    ... Joe, W4TV
>
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