What is your quad's boom length? I just modeled a 4el yagi with a 32'
boom at 75' which is a simple antenna to build and install. The gain, over
ground, is 14dBi.
John KK9A
To: towertalk@contesting.com
Subject:Re: [TowerTalk] rotating delta loop
From: Brian Alsop <alsopb@nc.rr.com>
Date: Fri, 30 Aug 2013 13:47:39 +0000
I had a four element GEM quad (second director to reflector spacing
element spacing on 20M ~22'). I modeled it in EZNEC.
With ground reflection gain, it came in about 15 dbi on 20M.
Subtract about 6db or ground reflection gain and it becomes 9 dbi.
Subtract 2.2 db and it becomes 5.8 dBd.
So something like the quoted 11.5 dBd is a reasonable number if it
includes ground reflection gain.
73 de Brian/K3KO
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