I also anecdotally observed greater propagation with the counterpoise wire hanging vertically this past weekend.
Intuitively, using a vertical counterpoise, as the "feedpoint" increases in height away from the ground plane of the Earth, the takeoff angle should decrease as the radiation pattern more and more resembles a free-space vertically oriented dipole field (picture a field shaped like a donut). > > ---------------------------------------------------------------------- > > Message: 1 > Date: Tue, 28 May 2019 13:24:03 -0400 > From: Hank <h...@optilink.us> > To: VE2PID <ve2...@videotron.ca>, elecraft@mailman.qth.net > Subject: Re: [Elecraft] [AX1] Who has the AX1 antenna DX record? > Message-ID: <5bd0e4be75154c7f58e74eb7ee1b7...@optilink.us> > Content-Type: text/plain; charset=UTF-8 > > > Good info! > > I have noticed from operating in the field that I make more contacts if I > lay the counterpoise along the ground. ?I get better signal reports from > stations in the direction of the counterpoise. > > I noticed from operating this weekend at an overlook that with the > counterpoise over the side of the overlook going down hill at roughly 30 > degrees, my contacts were clustered farther away - again in the direction > of the counterpoise. > > I was operating on 20 and 17 with the AX1, KX3, SSB at 15 watts. > > Hank > K4HYJ > ? > ----- Original Message ----- > From: VE2PID (ve2...@videotron.ca) > Date: 05/28/19 11:30 > To: elecraft@mailman.qth.net > Subject: Re: [Elecraft] [AX1] Who has the AX1 antenna DX record? > > ... I used the AX1 as a test in WPX CW last weekend for only an hour on > a picnic table. No problem ...in that time I got 13 QSOs from FN45 > including FL. (10 Watts KX2, 13' counterpoise). > -- > After NEC simulations (0.005, 13 average ground) , we find how the gain > is maximized in the direction of the counterpoise. On 20 meters, if the > wire is horizontal at 4 feet height, the take-off angle is about 56 > degrees. But if the wire goes down from 4 feet to the ground (15 degrees > slope), the F/B is less but the take off angle is lower at 35 degrees > > (Image at https://i.imgur.com/XKPjM8T.jpg ) > > 73, Pierre VE2PID > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > -- Adam Goler, PhD Cell: (425) 985 8700 "Fear is the mind killer." ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
