This is not what you are asking, but I use elevated radials with my
grounded tower for 160. 150 ft tower, 2 radials, 8 ft high in opposite
directions. They slope to the ground in the 10 ft closest to the tower. I
run an old piece of coax up the tower on about 3 foot standoffs made from
scraps of wood. I tap the center conductor and shield to the tower at about
the 60 ft level with some conductive grease and a hose clamp. Shorter
towers would have to be tapped proportionately higher. I use a couple of
vaccum variables, one in series with the feed line and the other to ground.
Center conductor of feed line to the tap coax shield and center conductor,
feed line shield to radials. I adjust radials for resonance by feeding them
like a dipole and trimming the same amount from each. The swr dip using the
caps is very sharp. You may get away with just the series cap if you get
the tap at the right spot on the tower.
Chuck W5PR
On Tuesday, December 15, 2015, <wosborne44@gmail.com> wrote:
> I have a tower that has a base that is in concrete and grounded. I would
> like to make it a vertical without installing insulators. Has anyone used
> elevated radials with reverse feeding, i.e., connecting the center
> conductor to the radials and the shield to the grounded tower? I see this
> in the ARRL handbook but I cannot seem to make a model of it work. Any
> help would be welcome.
>
> Thanks,
>
> William Osborne--K5ZQ
>
> 270-205-9565
>
> Wosborne44@gmail.com
>
>
>
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