Too much science for one Sunday. We could all just strap in, take a hike, and get on the air.
---- elecraft.com > On Sep 25, 2022, at 3:21 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] ______________________________________________________________ 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]
