Since the time span ebbs and recedes, i.e., loop better for a while then the
vertical, then the loop. I doubt if those magnetic anomalies enter into the
picture.
> Date: Mon, 9 Sep 2013 13:09:10 -0400
> From: jarritt@vt.edu
> To: topband@contesting.com
> Subject: Re: Topband: More anecdotal "stories" to cause one to stop and....
>
> On 9/9/2013 10:33 AM, James Rodenkirch wrote:
> > Listening to a fella on 80 SSB this morning about his experiences with a
> > vertical 1/4 wave and a horizontal loop on Top Band.
> > He said he had both up and used them over a 20+ year period and noticed
> > that one would work better than the other for DX. For five years or so the
> > loop would outperform, for a couple of years the two would be equal and
> > then for about five years the vertical would do better.
> > One can easily point to the 12 year period as aligned with the Solar Cyclef
> > BUT -- when I look at the radiation patterns for both I see the loop as a
> > hugely efficient NVIS antenna with little low angle radiation. Sooooo, I
> > think there are some magnetic anomalies at play here but -- if the
> > radiation angles don't change, how does one work "mo betta" than the other?
> >
>
> Given the time span involved, one could also easily point to
> deteriorating antenna and feedline conditions in that instance,
> too..... "local" magnetic anomalies.
>
> Terribly tough to control that experiment data.
>
> 73,
> - Josh / KF4YLM (operating a wretchedly deteriorated 5-year-old Topband
> antenna at the moment....)
> _________________
> Topband Reflector
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Topband Reflector
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