John
( got your name from QRZ ..you forgot to sign your post)
Yes you can do this, and yes it will be better than nothing at all
Ideally one would like a "uniform " ( in all directions ) set of ground
radials with the antenna at the center. I am guessing from you
description though that the antenna is a the corner of the lot (???).
Installations with "non uniform" distribution of the ground plane will
result in a non uniform radiation pattern likely favoring the direction
from the antenna towards the ground plane field. with some loss of
signal in the direction away from the antenna that essentially has no
radials
Again I think you are talking about only two radials(?) which will in
the case of ground mounted radials will not provide much of a "ground"
plane. Several ( as in dozens) of "short" ( even as short as 60' to 90'
on 160M )� radiating from the base of the actual antenna will probably
be more effective. To know for sure start out by measuring the feed
point� impedance of the antenna with an antenna analyzer at the base of
the antenna then remeasure and log the impedance with every 2-4 radials
you add. If you then plot the the number of radials vs impedance you
will see a curve that will project the a point at which further radials
is not buying you much.
A little late for a Xmas present but a copy of ON4UN's (SK) book on low
band dxing will provide you hours of reading and much additional insight
into ground systems and 160M
hope that helps
Dave
NR1DX
On 12/24/2020 4:56 AM, w5jmw@towerfarm.net wrote:
OK,it is somewhat winter hr.I am getting ready to lay ground radials
while the grass is dead for the winter.My antenna farm is on a square
acre.I have a tower in the sw corner.A sal in the mid north.Plans for
a 80 phased array along the east side.What I am wanting to do ie to
run radials from corner to corner.That is to say from ne to sw and
from nw to south east.Initially run these then go from side to
side.The radials will be jouned in the middla by a split bolt to a
ground rod....I plan on using the radial for all the antennas if
possible.My question...First Can I do this ?
Question 2 does the radial foeld need to be at the base of a
antenna.Could i run a radial to the ground screen and sue the
screen.Which is what I envision after all is run...Pros and cons
please before I start.If I use independent radials they WILL
cross....Thoughts on this please...73 john W5JMW.a little pistol
trying to grow..
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