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Re: Topband: 160 metre vertical with 'top loading'

To: "Joe Subich, W4TV" <lists@subich.com>
Subject: Re: Topband: 160 metre vertical with 'top loading'
From: shristov <shristov@ptt.rs>
Date: Wed, 27 Apr 2011 12:36:04 +0200
List-post: <topband@contesting.com">mailto:topband@contesting.com>
"Joe Subich, W4TV" <lists@subich.com> wrote:

> Any coil that shows a 60% decrease in current through
> it has a significant amount of unexplained loss.


A current decrease (meaning less current at one end that at the other)
is not a loss, and it's far from being unexplained.

It's caused by the standing wave, just like the current decrease on a straight 
wire.
The general nature of the standing wave is not altered by the fact
that the wire is wound insted of being straight.

Consider helically wound vertical antenna.
The current decrease here is from 100 % at the bottom to 0 % at the top,
but it involves no loss (on it's own), just the standing wave.


73,

Sinisa  YT1NT, VE3EA
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UR RST IS ... ... ..9 QSB QSB - hw? BK

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