Topband: Modeling the proverbial "vertical on a beach"

[Carl]

Nope but the RX antennas usually allow you dig a long way below the TX 
antenna noise.
Most of the world isnt so lucky to have a selection of RX antennas or if 
they do the local QRN is too loud; another 10dB often helps (-;

Carl
KM1H


----- Original Message ----- 
From: "Charlie" <charlie-cunningham at nc.rr.com>
To: "'Carl'" <km1h at jeremy.mv.com>; "'Tom W8JI'" <w8ji at w8ji.com>; "'TopBand 
List'" <topband at contesting.com>
Sent: Friday, August 15, 2014 2:27 PM
Subject: RE: Topband: Modeling the proverbial "vertical on a beach"


> Doesn't  help  you HEAR any better!
>
> Generally, on top band, even with my modest inverted- L with a few 
> elevated
> radials, if  could hear 'em I could work  'em!   With 500 W. Best thing I
> ever did for myself was to put up some quiet terminated receiving loops, 
> so
> I could hear much better!
>
> 73,
> Charlie, K4OTV
>
> -----Original Message-----
> From: Topband [mailto:topband-bounces at contesting.com] On Behalf Of Carl
> Sent: Friday, August 15, 2014 12:39 PM
> To: Tom W8JI; 'TopBand List'
> Subject: Re: Topband: Modeling the proverbial "vertical on a beach"
>
> 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
>> _________________
>> Topband Reflector Archives - http://www.contesting.com/_topband
>>
>>
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