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

[Bill Lederer]

I do a similar evaluation of antenna combinations (random wire with/without
9:1) but instead of using different call signs, I move one khz away and
record results that way with RBN.

On Sun, Sep 25, 2022 at 5:19 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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