Mike,
The reason the beverage wire in the model is 2 ft. below the surface is to have
it away from the ground somewhat and have a nice segment length from the wire
to ground on each end. The model shows only about 2 dB difference in gain and
no pattern difference between the wire 1” below ground and 2ft., which I
suspect could be correct for 160 meter frequencies. Of course, the pattern is
the problem.
In practice, I would lay it on the ground and after a few years, it would be
just below the surface.
Hmmm. BBG – Beverage Below Ground.
Jim – KR9U
From: Mike Waters [mailto:mikewate@gmail.com]
Sent: Saturday, February 21, 2015 8:26 PM
To: jbwolf@comcast.net
Cc: topband
Subject: Re: Topband: Modeling a BOG
I have never heard of anyone burying a BOG. The radials could be buried an inch
or so, but a BOG should lay on the ground or slightly above. 2 ft. is two feet
too deep.
About 200' is a common length for a BOG on 160.
73, Mike
www.w0btu.com
On Sat, Feb 21, 2015 at 6:51 PM, James Wolf <jbwolf@comcast.net> wrote:
I am trying to model a BOG (Beverage On or in the Ground). ... As soon as I
drop the antenna below ground level, approx. 2 ft. without errors, I lose all
indication of directivity except for a few dB. I have tried different lengths
from 200 ft. to 800 ft.
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