[TowerTalk] 160m Inverted L

[jeremy-ca]

I dont need to Google anything. I suggest that you do the reading on what 
happens to the near field elevation pattern as a function of ground 
resistance.
If you need assistance consult with a broadcast engineer who does proof of 
performance testing.

Carl
KM1H



----- Original Message ----- 
From: "Jim Brown" <jim at audiosystemsgroup.com>
To: <towertalk at contesting.com>
Sent: Monday, July 23, 2007 12:43 PM
Subject: Re: [TowerTalk] 160m Inverted L


> On Mon, 23 Jul 2007 11:49:11 -0400, jeremy-ca wrote:
>
>>Im a big fan of elevated radials since I live on top of a ridge; granite 
>>has
>>poor conductivity!  At a prior location with damp but sandy soil a ground
>>screen made a huge difference when placed over 60 on ground radials.
>
> It's important to understand that the function of radials is to act as a 
> return
> for antenna current and increase the EFFICIENCY. They do NOT lower the 
> angle of
> radiation -- that happens with actual EARTH reflections in the far field, 
> and
> that is pretty much out of our control -- we're stuck with soil conditions 
> and
> the slope of the soil unless we have the financial resources to buy other 
> soil
> conditions and slope of the soil. :)
>
> Recent editions (for at least the last ten years or so) of the ARRL 
> Antenna Book
> have an excellent discussion of this. So does W2DU's website. Google to 
> find it.
>
> 73,
>
> Jim Brown K9YC
>
>
>
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