[600MRG] Short Radial Observation

[Neil Klagge]

Andy, my experience has been similar to Ben’s.


Sent from Neil's iPhone

On Aug 29, 2018, at 08:24, Ben Gelb <ben at gelbnet.com<mailto:ben at gelbnet.com>> wrote:

Hi Andy -

I'd take 350 feet. I have maybe 8 radials of 20-30 ft each.

Did you do a measurement w/ no radials at all?

My experience was that the first radial (and/or attachment to house ground) makes a significant difference (maybe 20 ohms), and its diminishing returns after that (maybe an ohm or two of feedpoint Z change).

On Tue, Aug 28, 2018 at 7:09 PM, Andy - KU4XR via 600MRG <600mrg at mailman.qth.net<mailto:600mrg at mailman.qth.net>> wrote:
Greetings all:

To start - 350 feet of radial wire is miniscule on 630 meters .. for a few days since getting my new antenna up,
I have been experimenting with some short radials underneath the antenna.. I tried running from the ground rod
out 50 feet - across 5 feet - and back to the ground rod - then repeat, until that wire ran out.. I ended up with
10 wires - extending 50 feet - covering 45 feet of earth - directly underneath the top loading.. Noticed NO change
in any antenna parameter.. Next I am simply running 3 wires - each about 115 feet long from my ground rod,
thru my back yard, the ends are about 20 feet apart - so covering about 40 feet of earth.. Still NO Change ..
The wire is small guage Aluminum Electric fence wire ( just to add to the record ) .. I have done this same
experiment - placing the wires in various locations, and the same result everytime - NO Change in any
antenna parameter... not a milliamp of RF current, or a " point " of VSWR change.. Seeing there is no change
appearing in any placement; is it a reasonable assumption that this small amount of " wire on the ground "
serves no useful purpose to the antenna system ??

Thanks, and 73:

Andy - KU4XR
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