Topband: Modeling the proverbial "vertical on a beach"

[Carl]

A 3CX15000B7 or similar makes up for a lot of things and especially to those 
who always want to be on top in a pileup or contest.

Carl
KM1H


----- Original Message ----- 
From: "Tom W8JI" <w8ji at w8ji.com>
To: "'TopBand List'" <topband at contesting.com>
Sent: Friday, August 15, 2014 9:51 AM
Subject: Re: Topband: Modeling the proverbial "vertical on a beach"


>
> For receiving, an absence of noise sources in the path is all the 
> difference in the world. As an example of this look at what N7JW and K7CA 
> did from the Utah desert area. Utah desert is like the anti-saltwater, and 
> they are located much further from Europe than the east coast with a worse 
> polar area path, yet they had outstanding results. Saltwater has the same 
> advantage, as do freshwater bodies, of a lack of noise sources in what 
> might be a desired direction.
>
> For efficiency (which only affects transmitting), the advantage is 
> primarily concentrated at low angles and primarily affects vertically 
> polarized systems. The question then becomes one of wave angle and 
> polarization.
>
> Then there is distance as a factor, and path loss related to the magnetic 
> poles, which are factors.
>
> A good station has a combination of everything going for it, but there is 
> no magic and there certainly isn't any 10 dB or more involved just from 
> being near saltwater. A few dB here and there from multiple factors are 
> what make the difference. Move 25% or 50% closer, get rid of noise sources 
> in the path, increase vertical antenna performance at low angles a few dB, 
> and get away from going past the magnetic poles and it is a winner. It 
> isn't from magic, and it isn't all from the presence of saltwater, and it 
> is not 10-20 dB by any stretch of the imagination.
>
> 73 Tom
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