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Re: [TowerTalk] TowerTalk Digest, Vol 110, Issue 59

Subject: Re: [TowerTalk] TowerTalk Digest, Vol 110, Issue 59
From: David Gilbert <>
Date: Mon, 27 Feb 2012 20:26:09 -0700
List-post: <">>
A W8JK antenna with single wires (i.e., no folded dipole type elements) 
has a very low impedance ... something like 3 or 4 ohms if I remember 
correctly, and that's for full sized elements.  I'm not sure I see the 
point of feeding it with high impedance ladder line but I can easily 
picture a pretty high SWR if he does.  It would make a lot more sense to 
me to use the lowest impedance feedline available ... like maybe some 50 
ohm coax in parallel of the right length to get an upward impedance 
transformation to the shack.

I'd also be concerned about how ugly a 100:1 SWR on ladder line is going 
to be when it gets wet.

Dave   AB7E

On 2/27/2012 8:10 PM, Wilson Lamb wrote:
> What's keeping you from putting a matching network at the antenna??  It's
> been many years since I even saw an 8JK, but I don't remember hearing about
> such SWR.
> BTW, the biography of JK, The Big Ear, is a fun read.
> WL

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