Topband: Best 160 antenna
MICHAEL ST ANGELO
mstangelo at comcast.net
Mon Aug 28 12:48:11 EDT 2017
Have there been any professional studies done on the efficiency of elevated radials?
One would think the broadcast industry would be interested in a few elevated radials instead of burying all that expensive copper. They could use the Aluminium conductor steel-reinforced cable favored by the power companies.
I read N6LF's paper and I recall he emphasized the radials should be tuned? What are the effect of changes in foliage around the radials ground moisture content when it rains or snows.
I tried elevated radials when I installed my Inverted L but found it problematic supporting four quarter wavelength radials in the yard. Also, the XYL doesn't mind some wires strung across the tree tops but would object to low wires strung about the yard.
I ended up placing radials in the ground since most of that part of the yard is wooded. They get buried under the undergrowth and leaves.
> On August 28, 2017 at 10:17 AM Mike Waters <mikewate at gmail.com> wrote:
> Maybe not. There has been more research done since I last read N6LF's
> writings, etc. The earth underneath must have something to do with it. In
> any case, the current has to be the same on all the radials.
> This is the first reference. See what you think.
> 73, Mike
> On Aug 28, 2017 8:03 AM, "StellarCAT" <rxdesign at ssvecnet.com> wrote:
> Really? Well established FACT? I’m quite confused then as reading John’s
> book it seems quite nebulous the impact of elevated radials. Doesn’t seem
> to be a ‘fact’ – more dependent on location and other variables. I’m not
> suggesting you’re wrong – just it seems the jury is quite out on this
> ‘fact’. W8JI measured a -4.3 db difference between 4 elevated and only 60
> (not 120) on the ground .... others show differences of -3 – almost -6 db
> ... I’m not sure itsquite that clear to say “well established fact” ...
> Gary K9RX
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