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Re: [TowerTalk] what size wire for kilowatt TX ??

To: towertalk@contesting.com
Subject: Re: [TowerTalk] what size wire for kilowatt TX ??
From: Steve Hunt <steve@karinya.net>
Date: Sat, 03 Jan 2009 21:46:44 +0000
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
Nope - the current will be much higher in an electrically short antenna. 
What matters is not its high reactance - that will get tuned out by the 
matching circuitry - but the low radiation resistance where the power is 
being dissipated. If you don't believe it, just picture how much current 
is flowing in a small magnetic loop antenna or a mobile whip.

73,
Steve G3TXQ

Martin Ewing wrote:
> This all assumes you're talking about a full size dipole.  If your antenna
> is more like a short whip, the current in the wire is much less, since it is
> a high impedance antenna.  Then, your problem is in the antenna
> tuner/coupler and ground system, where there could be high losses.
>   

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