Every conductor attached to the radio’s case (ground) will become part of the counterpoise. Including your body, and any other objects that are conductive that capacitively or resistively couple to the ground.
This is one of the many reasons why an ATU is needed to compensate for electrically short antennas. Wayne ---- elecraft.com > On Sep 25, 2022, at 7:49 AM, Julia Tuttle <[email protected]> wrote: > > How long is the power cable? Is it possible it's using that as a > counterpoise? > >> On Sun, Sep 25, 2022, 10:07 Ron Gruner <[email protected]> wrote: >> >> I've just run two tests of my WSPR/AX-1 set-up with and without a >> counterpoise. Each test ran 24 hours over the last couple of days. Here are >> the results: >> >> COUNTERPOISE? >> YES NO >> ------- ------- >> Total Contacts 152 129 >> Maximum Distance (km) 15,720 17,276 >> Median Distance 2,137 1,823 >> Median SpotQ 446 398 >> >> Where SpotQ = Kilometers / [(2 Watts x (SNR in DB + 36))/36) ] >> >> The WSPR circuit's ground and SMA connectors are apparently providing >> enough of a counterpoise to propagate a respectable signal. >> >> Here's a close-up of the rig with no counterpoise: >> https://gruner.com/k4rhg/wspr_ax-1_nocounterpoise.png >> >> 73, >> Ron Gruner >> K4RHG >> ______________________________________________________________ >> 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] ______________________________________________________________ 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]
