[Elecraft] AX-1 -- with and without counterpoise

[Wayne Burdick]

Too much science for one Sunday. We could all just strap in, take a hike, and get on the air. 

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elecraft.com

> On Sep 25, 2022, at 3:21 PM, Jim Brown <jim at audiosystemsgroup.com> wrote:
> 
> On 9/25/2022 1:43 PM, Bill Mader wrote:
>> Putting the results in a spreadsheet quickly makes antenna configurations'
>> difference apparent.  I have done something similar using the RBN, two
>> antennas, and two nearby frequencies on the same band.  This method
>> effectively identified which antenna was preferred in different directions
>> and distances.  Even so, the differences could change briefly at any time
>> so being able to switch antennas instantly was extremely helpful.
> 
> I've done that for two 160M antennas, one of which had a couple of dB of directivity. I used my call on one, a club call on the other. Transmitted TEST K9YC on CW 5-6 times for each call, paused 5 min, QSYed both a bit, repeated 10-12 times. Did this 6-8 nights, had spreadsheet rows for each station that heard me, separate row for each antenna. The test provided excellent data.
> 
> W6GJB did something quite similar comparing a top and bottom loaded vertical we'd built for CQP/7QP expeditions with an inverted V on 80M. It also yielded good data. It's shown on a few slides in this talk we did at the Pacificon antenna forum. We've since abandoned the concept after later trying a half dozen or so iterations of the design because it's not mechanically practical for the intended portable use.
> http://k9yc.com/80M-FDVertical.pdf
> 
> 73, Jim K9YC
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