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Re: [TowerTalk] JK Mid Tri opinions

Subject: Re: [TowerTalk] JK Mid Tri opinions
From: David Gilbert <>
Date: Sun, 22 Dec 2019 21:22:00 -0700
List-post: <>

If you are able to measure complex impedances, run your shack measurements through TLW and see what it says you have at the feedpoint.  You might be surprised to find that it correlates.

Dave   AB7E

On 12/22/2019 7:07 PM, K9MA wrote:
I put one up last summer. It seems to work fine, though the f/b appears to be only 
12-15 dB. That’s not necessarily a bad thing.

The SWR looks very good measured at the shack, closely matching the published curves. 
Strangely, when I measured it up at the feedpoint, it looked different, though not 
really bad. Feedline loss is too low to explain that, so I don’t know what to 
make of it. W3JK predicted this effect.

I’ve not tried load it on 12 or 17.


Scott K9MA


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