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Re: [TowerTalk] Looking for recommendations for an 80 M DX antenna

To: towertalk@contesting.com
Subject: Re: [TowerTalk] Looking for recommendations for an 80 M DX antenna
From: Jim Brown <jim@audiosystemsgroup.com>
Reply-to: jim@audiosystemsgroup.com
Date: Sat, 4 Dec 2021 12:55:04 -0800
List-post: <mailto:towertalk@contesting.com>
On 12/4/2021 9:43 AM, Don Solberg wrote:
I would welcome any recommendations and experiences.

I have a similar situation, in a redwood forest. Dense forests like ours soak up vertically polarized RF, so verticals are a bad idea for us. My only verticals are for 160M, where any horizontal antenna would be VERY low electrically, and thus a cloud warmer.

I've studied this situation extensively, and I strongly recommend the highest flat dipole(s) you can rig at right angles to each other and fed with RG11.

Equally important, concentrate on HEARING the DX. First, work on cleaning up your RF noise -- that in your own home and, if possible, from your neighbors. Study http://k9yc.com/KillingReceiveNoise.pdf and utilize what you learn. The average home includes dozens of nasty noise sources, which must be searched out and killed. I run legal limit on FT8 on 6M and 160, and I regularly get signal reports that are 10 dB worse than I give. Since FT8 reports are all about signal to noise, this makes clear that the average ham is DEAF. If we can't hear 'em, we can't work 'em!

Second, work on RX antennas. Beverages are great if you have room. Single wires of about 275 ft are ideal for 80M, but shorter ones will still work, and are easy and cheap to build. I support mine both with laying them on brush and with sections of 1/2-in PVC conduit slipped over sections of 1/4-in rebar stuck into the ground. I have two reversible Beverages using DX Eng electronics, one to EU/VK and the other to JA/SA (I'm near San Francisco).

And last, work contests. It's a great way to get a head start on DXCC. I have 224 confirmed on 80 in 15 years from this QTH.

73, Jim K9YC
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