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1. Topband: Make 80m vertical work on 160 (score: 1): Author: "Franki ON5ZO" <on5zo@telenet.be>; Date: Sun, 4 Oct 2009 20:28:32 +0200; Gentlemen, please your advice. If I were to convert my working resonant 80m vertical into a 80/160m antenna, I assume I have two basic options according to the literature: - Use a trap to 'split' the; /archives//html/Topband/2009-10/msg00076.html (7,450 bytes)
2. Re: Topband: Make 80m vertical work on 160 (score: 1): Author: Dan Zimmerman N3OX <n3ox@n3ox.net>; Date: Sun, 4 Oct 2009 19:24:51 -0400; I use a coil to load my 80m vertical on a fiberglass pole to resonance on 160m. I recently built a computer controlled switch to handle the switching for me: http://n3ox.net/projects/stepperswitch/; /archives//html/Topband/2009-10/msg00077.html (14,624 bytes)
3. Re: Topband: Make 80m vertical work on 160 (score: 1): Author: DAVID CUTHBERT <telegrapher9@gmail.com>; Date: Sun, 4 Oct 2009 18:45:47 -0600; Franki, your 80 meter resonant vertical I assume is about 20 meters tall. You might want to consider top loading. That allows for two band operation with not active switching circuits. For example, t; /archives//html/Topband/2009-10/msg00078.html (9,598 bytes)
4. Re: Topband: Make 80m vertical work on 160 (score: 1): Author: GEORGE WALLNER <gwallner@the-beach.net>; Date: Mon, 05 Oct 2009 10:56:58 -0400; Franki, I have tried the linear loading described in ON4UN book. It was not better than a high Q base mounted loading coil. (I guess the Q of the linear loading element is not that high.) On the othe; /archives//html/Topband/2009-10/msg00082.html (8,450 bytes)
5. Re: Topband: Make 80m vertical work on 160 (score: 1): Author: K4SAV <RadioIR@charter.net>; Date: Mon, 05 Oct 2009 10:44:11 -0500; There are at least three problems associated with using a 1/8 wavelength vertical on 160 meters. Those are feedpoint impedance, bandwidth, and coil dissipation. To give you an example, for a 20 meter; /archives//html/Topband/2009-10/msg00083.html (9,742 bytes)
6. Re: Topband: Make 80m vertical work on 160 (score: 1): Author: Guy Olinger K2AV <olinger@bellsouth.net>; Date: Tue, 6 Oct 2009 12:40:05 -0400; There are many options. They are reduced by embraced assumptions or a requirement of only direct 50 ohm coax feed. If one makes the concession that there may be a miscellaneous Z to match on either; /archives//html/Topband/2009-10/msg00095.html (10,868 bytes)
7. Re: Topband: Make 80m vertical work on 160 (score: 1): Author: Art <k6xt@arrl.net>; Date: Tue, 06 Oct 2009 19:45:28 -0600; Somehow I missed the ON5ZO post so replying to K2AV's reply: I am using just such an antenna. I have a full size 80 ground plane currently with 18 quarter wave 80M radials attached 15 ft from ground.; /archives//html/Topband/2009-10/msg00098.html (13,580 bytes)
8. Re: Topband: Make 80m vertical work on 160 (score: 1): Author: "Franki ON5ZO" <on5zo@telenet.be>; Date: Thu, 15 Oct 2009 18:41:00 +0200; Hello TopBanders! In reply to my own posting a fortnight ago, I'd like to thank each and everyone offering advice and insights. It seems that each of the options (loading coils, lineair loading and t; /archives//html/Topband/2009-10/msg00166.html (10,596 bytes)

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