[Antennas] Fw: Diminishing Returns

[Jim Miller KG0KP]

----- Original Message ----- 
From: "Jim Miller KG0KP" <JimMiller at STL-OnLine.Net>
To: <dhallam at rapidsys.com>
Sent: Thursday, June 04, 2009 10:02 AM
Subject: Re: [Antennas] Diminishing Returns


> See Cebik's site (another post) and analyzing his data will show that ON 
> THE
> GROUND (ie "buried radials") you really need about 25 and more than 50 is
> pretty much a wasted of money.  They do NOT need to be tuned length on the
> ground.  His information shows that the ground "detunes" the radials and
> that more rather than longer is better.  More than 1/4 is a waste and so 
> is
> 1/4 wvae - more like 1/6 wave but length is not critical and you do NOT 
> need
> 25 per band, just 25, period, as they all work on all bands when on the
> ground.
>
> I have attached a couple of his studies which you will get but will be
> stripped form the reflector.
>
> 73, de Jim KG0KP
>
> ----- Original Message ----- 
> From: "David C. Hallam" <dhallam at rapidsys.com>
> To: "Antennas" <Antennas at mailman.qth.net>
> Sent: Thursday, June 04, 2009 9:20 AM
> Subject: [Antennas] Diminishing Returns
>
>
>>I realize you can't have too many radials for a vertical antenna, but
>> where do you reach the point of diminishing returns.  Out of necessity
>> my Butternut HF6V vertical is set on a narrow strip of land and I can't
>> fan the radials out in a 360 degree pattern.  I can get about two sets
>> of radials for each band fanned out at about 180 degrees, but beyond
>> that the spacing between more radials will become rather close.  Would
>> more radials placed close together be beneficial or do I have about the
>> best I can expect?
>>
>> I have no previous experience with verticals.
>>
>> David
>> KC2JD/4
>>
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>