Date: Mon, 23 Jun 97 16:49:00 PDT From: Cecil A Moore To: qrp-l@lehigh.edu Subject: [21834] Directivity for G5RV on 40m A friend of mine is going on sabbatical in the NW USA and wants to keep in touch on 40m CW at night. Unfortunately, my G5RV length dipole (102ft) fed with 450 ohm ladder-line, is oriented N10W to align the lobes for DX on 20m and 17m. Knowing that a Windom has directivity toward the long end, I tried modeling a 27ft vertical wire hanging from one end of the G5RV. It does give a nice directional pattern off the end where the vertical section is attached. Gain is about 5.5dBi with a horizontal beamwidth of 140 degrees, just what I needed. It's a super easy way to turn a G5RV length dipole into a "beam" 90 degrees away from the normal broadside pattern on 40m. It's a 2 minute setup time for me. 73, Cecil, W6RCA, OOTC ------------------------------ Date: Tue, 24 Jun 97 15:15:00 PDT From: Cecil A Moore To: qrp-l@Lehigh.EDU Subject: [21889] G5RV 40M Beam If we run our G5RV length antenna North/South, we get East/West coverage on 40 meters. One can also achieve North and South beaming on 40m with a G5RV by adding a 27ft vertical wire to one of the ends. Since I have pulleys on each end of my 102 ft dipole, it takes me about 2 minutes to install the additional wire. See what happens when I do at: http://people.delphi.com/CecilMoore/40mbeamv.htm 73, Cecil, W6RCA, OOTC ------------------------------ Date: Wed, 25 Jun 97 09:00:00 PDT From: Cecil A Moore To: qrp-l@Lehigh.EDU Subject: [21934] G5RV with 27ft Vertical Element Just a quick report. I hung a 27ft vertical element off the end of my G5RV length antenna last night. The results were better than expected. I logged into MBOs in Utah, Washington, and Oregon on PACTOR. Because of a null where a lobe was without the vertical element, I couldn't log into a Texas MBO which means the radiation pattern matches what is predicted by EZNEC. On 40m, my signal went from S6 to S9+10dB at a friend's house 18 miles NW of me when I added the vertical element. It works well. For those who missed it yesterday, take a look at: http://people.delphi.com/CecilMoore/40mbeamv.htm 73, Cecil, W6RCA, OOTC ------------------------------ 72 EB