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Re: Topband: K3NA Loop Array

To: Greg - ZL3IX <zl3ix@inet.net.nz>
Subject: Re: Topband: K3NA Loop Array
From: "Richard (Rick) Karlquist" <richard@karlquist.com>
Date: Thu, 24 Jun 2010 08:58:38 -0700
List-post: <topband@contesting.com">mailto:topband@contesting.com>

Greg - ZL3IX wrote:

> Beverage over good ground will still work as well as over poor ground, 
> *PROVIDED* that the ground is not so good, and the wanted signal levels 
> therefore so low, that they are not able to override the receiver 
> noise.  The pattern and RDF and the same whatever the type of ground, 
> and the unwanted atmospheric noise is lower by the same amount as the 
> wanted signal.  Correct?
> 
> 73, Greg ZL3IX

No this is not correct.  The highly conductive ground causes the current
to drop off and renders the wire beyond a certain length useless.
Because it is effectively a short Beverage, it won't have a great 
pattern.  The signal levels may also be low in addition to this.

Another poster stated that a 1500 feet Beverage over salt water
"worked".  That's not the criterion.  The real criterion is:
can you detect any difference if you cut the length back to 500
feet.  I had 1300 ft Beverage that "worked", however it "worked"
just as well after I cut it back to 500 feet using an inline relay.
I could A/B the signals vs length.  No difference.

Rick N6RK
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UR RST IS ... ... ..9 QSB QSB - hw? BK

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