[600MRG] Short Radial Observation

[Dave Riley]

Still lossy no matter what, loops outperform on this band, especially 
when coupled to hv lines, wink wink..

No grounds, no rods, way less losses... Gain in some cases...

  Raising latest version of LOOP wire this week...  Storm is over, tree 
stumps are gone... Think of RG6  junk CATV coax as #4 solid wire, or so, 
way lower loss, TPO much less for 20W of eirp......

Parallel a pair of junk RG6s, pretty soon not much TPO needed... Your 
mileage may vary...

DaveR, 1A




On 8/29/2018 11:35 AM, Neil Klagge wrote:
> 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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