On 12/24/2020 1:56 AM, w5jmw@towerfarm.net wrote:
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 ?
The short answer is that this is a very bad idea. The earth is a big
resistor, and if the antenna sees it, it burns a lot of the transmitter
power. Radials or a counterpoise provide a low resistance return path
for the antenna current; radials, in addition, shield the antenna's
field from the lossy earth.
An antenna's field surrounds it on all sides, and for radials to be
effective, they must extend out from the base, and be connected to the
coax shield. An earth connection (ground rod) does NOT make a transmit
antenna work better unless it's to an expanse of salt water.
Radial systems work best if they are symmetrical and dense, but if
available real estate and antenna locations prevent that, the best
layout for on-ground radials is to run as many as you can in as many
directions as you can. There is no need for on-ground radials to be of
equal length. There are many practical ideas about this in a tutorial
talk I've done at ham conventions and club meetings. Slides are here. No
original work by me, but a collection of great work by others.
http://k9yc.com/160MPacificon.pdf
73, Jim K9YC
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