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1. [TowerTalk] 80M Delta loop (score: 1): Author: "Jon Casamajor" <k6el@comcast.net>; Date: Wed, 3 Feb 2010 19:06:11 -0800; All, Sorry my attempt at a graphic depiction of the 80m Loop I had run got so hosed up with the formatting. A little imagination will get you the point and is probably better than me trying to re-do; /archives//html/Towertalk/2010-02/msg00081.html (10,085 bytes)
2. Re: [TowerTalk] 80M Delta Loop (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Wed, 24 Jul 2024 12:41:36 -0700; with elevated radials, preferably above .05 wavelength in height. Poor soil degrades the efficiency of vertically polarized antennas both under the antenna AND in the far field, where the ground refl; /archives//html/Towertalk/2024-07/msg00070.html (8,168 bytes)
3. Re: [TowerTalk] 80M Delta Loop (score: 1): Author: kq2m@kq2m.com; Date: Wed, 24 Jul 2024 18:13:43 -0500; Jim, I mentioned "one antenna that does work well even over poor ground", not the best antenna overall. And it does work very well - enough to let me work 39 zones and 300+ countries on 80 not to men; /archives//html/Towertalk/2024-07/msg00079.html (10,115 bytes)
4. Re: [TowerTalk] 80M Delta Loop (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Wed, 24 Jul 2024 20:07:49 -0700; I looked at the FCC map, and you're right, Bob, your soil conductivity is poor. Thus, the principle advantage of your array as compared to a high horizontal dipole is directivity, NOT gain. And yes,; /archives//html/Towertalk/2024-07/msg00081.html (9,606 bytes)
5. Re: [TowerTalk] 80M Delta Loop (score: 1): Author: <sawyered@earthlink.net>; Date: Thu, 25 Jul 2024 13:07:39 -0400; If you look at the info for average ground conductivity and you zoom in on the worst in the US, you might see me at the base of my towers waiving at you. Ed N1UR In the heart of the Granite Capital o; /archives//html/Towertalk/2024-07/msg00083.html (7,075 bytes)
6. Re: [TowerTalk] 80M Delta Loop (score: 1): Author: Brian Beezley <k6sti@att.net>; Date: Thu, 25 Jul 2024 17:01:06 -0700; conductivity is poor. That's a good use of the FCC map, Jim. I had completely written it off for ham use once I discovered that it applies only to the AM broadcast band. Values will be quite differen; /archives//html/Towertalk/2024-07/msg00091.html (8,673 bytes)
7. Re: [TowerTalk] 80M Delta Loop (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Thu, 25 Jul 2024 20:49:54 -0700; I couldn't open the dropbox file -- it wanted me to sign in. But I do have some background on this -- one of my summer jobs while in EE was working for Pete Johnson in his consulting office using tha; /archives//html/Towertalk/2024-07/msg00092.html (9,513 bytes)
8. Re: [TowerTalk] 80M Delta Loop (score: 1): Author: Brian Beezley <k6sti@att.net>; Date: Thu, 25 Jul 2024 22:01:14 -0700; Try this: http://ham-radio.com/k6sti/FCCMapArticle.pdf Brian _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@contestin; /archives//html/Towertalk/2024-07/msg00093.html (7,413 bytes)
9. Re: [TowerTalk] 80M Delta Loop (score: 1): Author: Brian Beezley <k6sti@att.net>; Date: Fri, 26 Jul 2024 07:42:39 -0700; There's a problem with using the FCC conductivity map to rank HF conductivities that I overlooked: skin depth is much smaller at HF. Soil with different conductivity may come into play at broadcast f; /archives//html/Towertalk/2024-07/msg00096.html (8,778 bytes)
10. Re: [TowerTalk] 80M Delta Loop (score: 1): Author: Mike Fatchett W0MU <w0mu@w0mu.com>; Date: Fri, 26 Jul 2024 09:14:58 -0600; That map is interesting. Unless I read the map wrong the higher the number the better? I always thought our ground conductivity out here in the plains of Colorado was poor. At our house we have ab; /archives//html/Towertalk/2024-07/msg00097.html (10,445 bytes)
11. Re: [TowerTalk] 80M Delta Loop (score: 1): Author: kq2m@kq2m.com; Date: Fri, 26 Jul 2024 10:33:34 -0500; I have interspersed some comments below.... On 2024-07-24 22:07, Jim Brown wrote: On 7/24/2024 4:13 PM, kq2m@kq2m.com wrote: I mentioned "one antenna that does work well even over poor ground", not t; /archives//html/Towertalk/2024-07/msg00099.html (17,084 bytes)
12. Re: [TowerTalk] 80M Delta Loop (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Fri, 26 Jul 2024 10:13:40 -0700; No, it's about east coast stations in DX contests (and DXCC) starting on third base and thinking they hit a home run. Anything based on countries count gives anyone around the Atlantic Basin a huge a; /archives//html/Towertalk/2024-07/msg00101.html (9,283 bytes)
13. Re: [TowerTalk] 80M Delta Loop (score: 1): Author: "dj7ww@t-online.de" <dj7ww@t-online.de>; Date: Fri, 26 Jul 2024 21:01:50 +0200 (CEST); I thought it is about vertical polarized antennas over poor ground? 73 Peter, DJ7WW No, it's about east coast stations in DX contests (and DXCC) starting on third base and thinking they hit a home ru; /archives//html/Towertalk/2024-07/msg00102.html (9,497 bytes)
14. Re: [TowerTalk] 80M Delta Loop (score: 1): Author: S57AD <mirko.s57ad@gmail.com>; Date: Fri, 26 Jul 2024 21:48:10 +0200; Likewise! Mirko, S57AD V V pet., 26. jul. 2024 ob 21:02 je oseba dj7ww@t-online.de < dj7ww@t-online.de> napisala: -- Mirko S57AD _______________________________________________ ______________________; /archives//html/Towertalk/2024-07/msg00103.html (10,002 bytes)
15. Re: [TowerTalk] 80M Delta Loop (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Fri, 26 Jul 2024 14:38:50 -0700; It was, but Bob was contending that because his station worked so well, that it didn't matter. :) 73, Jim K9YC _______________________________________________ ________________________________________; /archives//html/Towertalk/2024-07/msg00104.html (9,702 bytes)
16. Re: [TowerTalk] 80M Delta Loop (score: 1): Author: "dj7ww@t-online.de" <dj7ww@t-online.de>; Date: Fri, 26 Jul 2024 23:45:24 +0200 (CEST); That was nowhere mentioned but why don´t you book transmit time at RHR Maine if you are that frustrated with your location in W6? 73 Peter It was, but Bob was contending that because his station work; /archives//html/Towertalk/2024-07/msg00105.html (10,448 bytes)
17. Re: [TowerTalk] 80M Delta Loop (score: 1): Author: "Jim Lux" <jim@luxfamily.com>; Date: Fri, 26 Jul 2024 17:49:59 -0400; And, from an antenna pattern standpoint, the dielectric constant (which is highly moisture content dependent) is important. Id venture that changing epsilon from 4 to 16 has a much bigger effect tha; /archives//html/Towertalk/2024-07/msg00106.html (11,503 bytes)
18. Re: [TowerTalk] 80M Delta Loop (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Fri, 26 Jul 2024 15:56:09 -0700; The problem is not where any of us choose to live, but rather archaic contest rules that strongly favor certain locations over others. In the case of W6, it's 10:1 in DX contests. I didn't build an R; /archives//html/Towertalk/2024-07/msg00107.html (10,008 bytes)
19. Re: [TowerTalk] 80M Delta Loop (score: 1): Author: <john@kk9a.com>; Date: Fri, 26 Jul 2024 20:30:22 -0400; Since we cannot change our ground conductivity, is there a number on the chart where it's not worth installing a typical 80m 4 square (with buried radials)? It looks like many of the big New England; /archives//html/Towertalk/2024-07/msg00108.html (8,089 bytes)
20. Re: [TowerTalk] 80M Delta Loop (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Fri, 26 Jul 2024 19:10:35 -0700; On 7/26/2024 5:30 PM, john@kk9a.com wrote: Since we cannot change our ground conductivity, is there a number on the chart where it's not worth installing a typical 80m 4 square (with buried radials)?; /archives//html/Towertalk/2024-07/msg00109.html (9,545 bytes)

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