Re: Topband: Easy Inverted L for 169 (NCJ M/A 2011) Info Needed

[Barry N1EU <barry.n1eu@gmail.com>]

On Tue, Nov 8, 2011 at 6:57 PM, W0MU Mike Fatchett <w0mu@w0mu.com> wrote:
> If the feedpoint is elevated you should have 4 tuned radials.

The antenna efficiency will improve as you add more elevated radials
beyond just 4.  Eight to fifteen feet of feedpoint elevation isn't
sufficient to reach theoretical efficiency with just 4 elevated
radials on 160M.

And no, the radial length isn't necessarily the same as the radiator
length - they need to be tuned and pruned as they are installed and
greatly influenced by ground proximity.  Tuning is typically done in
pairs.

Barry N1EU
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