Topband: K3NA Loop Array

[k3bu at optimum.net]

That is generally true, those who tried Beverages over good ground are not very pleased, probably due to the low signal levels.
Vic, W1WCR (?) in his Wave Antenna Handbook describes Wave Antenna that is similar to Beverage, but supposedly works over good ground. I have not tried it, I wonder if anyone did and how does it perform.
I am also looking into killer RX arrays for the salt water marshes. So far looks like vertical arrays are the answer. 
 
73 Yuri, K3BU.us
 

----- Original Message -----
From: rfoxwor1 at tampabay.rr.com
Date: Wednesday, June 23, 2010 10:48 am
Subject: Re: Topband: K3NA Loop Array
To: topband at contesting.com

> 
> ---- Greg - ZL3IX wrote: 
> > Hi Eric,
> > 
> > I am interested in a statement in your paper, "Beverages don't 
> work over 
> > high(ly) conductive earth"
> > 
> > By "not work", do you mean
> > 
> > * Low RDF?
> > * Pattern skewing?
> > * Low output?
> > 
> > I have a set of remote Beverages over quite high conductivity 
> earth. 
> > They seem to work OK, but the output is lower than I would 
> expect over 
> > poorer soil.
> > 
> > 73, Greg, ZL3IX
> 
> 
> This may be very simplified. I am far from a Beverage expert, 
> but it was
> explained to me once that the Bev works well over poorly conducting
> soil because the wavefront is no longer just vertically 
> oriented, as it
> travels down the length of the antenna wire; but rather is retarded,
> causing a forward tilt in the wavefront. This forward tilt then will
> induce a RF current down the length of the wire, which sums up 
> at the
> end (where the RX is). IOW instead of just a vertical field, 
> there is
> both a vertical and a smaller horizontal field, and the poorer 
> the soil,
> the greater horizontal field induces the antenna current you need.
> 
> >From this I'd guess that the result is indeed lower output level.
> Hope someone can give a proper answer (I haven't tried to 
> research it)
> 
> -Bob k2euh
> 
> 
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