[UK-CONTEST] Vertical radials
Clive GM3POI
gm3poi2 at btinternet.com
Thu Oct 15 05:04:25 PDT 2009
Just think about it Andy, Would you want a whole lot
of lossy soil on top of your radials ( a few 10s of
mm is ok).
Yes your radials are allowing the antenna NOT to see
the losses.
73 Clive GM3POI
----- Original Message -----
From: "Andy Swiffin" <a.l.swiffin at dundee.ac.uk>
To: <uk-contest at contesting.com>
Sent: Thursday, October 15, 2009 11:26 AM
Subject: Re: [UK-CONTEST] Vertical radials
>>>> On 13/10/2009 at 12:24, in message
>>>> <4AD46358.2030102 at btinternet.com>, "David,
> G3YYD" <g3yyd at btinternet.com> wrote:
>>
>> The key thing to remember about radials is they
>> act to screen the
>> underlying lossy soil from the RF current (note
>> current). A radial
>> system of any sort shape or whatever should be
>> thought of as a ground
>> screen.
>
> So, the last thing we want to do is bury our
> radials? Is that right?
>
> I'd always thought about it as providing an "earth"
> (hence people talk about using "earth stakes" -
> something I've always been dubious about), but in
> fact we're protecting our aerial from the earth?
>
>
> Andy
> '8oeg
>
>
>
> The University of Dundee is a registered Scottish
> charity, No: SC015096
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