I have yet to hear about a ham who had 120 buried bare radials
underneath his two raised radials.
ON4UN's original 80 meter wire 4-square hug around his 160 meter
tower came close to that description. The 4 square had a single
elevated radial for each 80 meter element but they were all over
some 100+ radials for 160 meters - most at least 1/4 wave long.
73,
... Joe, W4TV
On 1/21/2014 11:32 PM, Guy Olinger K2AV wrote:
On Tue, Jan 21, 2014 at 10:40 PM, Charlie Cunningham <
charlie-cunningham@nc.rr.com> wrote:
There's been a lot of work done in the broadcast
industry using elevated radials to replace deteriorated buried radial
fields
that shows that pretty clearly. It was published in some IEEE transactions
some years ago.
Be careful not to extrapolate very specifically qualified broadcast
experience into ham radio. Originally FCC spec radials still make the close
foreground earth appear VERY conductive, which is NOT an advantage one will
have putting up two or four radials over plain old dirt, unless one is
talking about midwest USA 30 millisiemen super dirt.
I have yet to hear about a ham who had 120 buried bare radials underneath
his two raised radials. A ham is talking about two or four raised over
plain dirt. Two or four over ugly North Carolina 2 millisiemen will be
down, though one will need comparison RBN plots watching an entire 160
contest to see it. It's not so far down though that you won't work happy DX
with it, but there is a power loss.
73, Guy.
_________________
Topband Reflector Archives - http://www.contesting.com/_topband
_________________
Topband Reflector Archives - http://www.contesting.com/_topband
|