L.B.Cebik has done a lot of testing and research on antennas as long time
Technical Editor of AntennaX magazine.
Take a look at his web page and for this topic look at
http://www.cebik.com/gp/gr.html . Shown there is the effect of number
verses length of radials. You will find the effectiveness (IMHO) is to use
a minimum of about 25 and a maximum of about 50 before the cost if dollars
far outweighs the return. The length does not really need to be even a 1/4
wave when they are ON the ground (this does NOT apply to elevated radials)
as the ground diminishes the effectiveness with additional length.
Somewhere around 2/10 wavelength seems practical.
Also bare vs. insulated wire see http://www.cebik.com/gp/ir.html .
Analyze the charts and article and make your own conclusions.
73, de Jim KG0KP
----- Original Message -----
From: "Tom Osborne" <w7why@verizon.net>
To: "Towertalk" <towertalk@contesting.com>
Sent: Friday, March 14, 2008 6:54 PM
Subject: Re: [TowerTalk] 160/80 inverted L
> About 66 feet from the insulator to the trap and around 43.5 feet past
that.
> Tom W7WHY
>
>
>
> > Tom, what dimensions did you end up using?
> >
> > 73,
> >
> > Dave, AA6YQ
> >
> > -----Original Message-----
> > From: towertalk-bounces@contesting.com
> > [mailto:towertalk-bounces@contesting.com]On Behalf Of Tom Osborne
> > Sent: Friday, March 14, 2008 5:06 PM
> > To: Towertalk
> > Subject: [TowerTalk] 160/80 inverted L
> >
> >
> > Hi TT'ians
> >
> > About a month ago I asked for dimensions for a 80/160 inverted 'L' using
a
> > Unidilla KW80 trap, and got lots of good info from the list.
> >
> > Got it up today and it looks good. SWR is lowest at 3540 and 1820.
> > Thanks
> > for all the good help--I really appreciate it. 73
> > Tom W7WHY
> >
> >
> > _______________________________________________
> >
> >
> >
> > _______________________________________________
> > TowerTalk mailing list
> > TowerTalk@contesting.com
> > http://lists.contesting.com/mailman/listinfo/towertalk
> >
> >
> >
>
> _______________________________________________
>
>
>
> _______________________________________________
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>
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