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 <[email protected]> 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 > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [email protected] > -- --w8lvn-- ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
