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1. Topband: ZL to EU (score: 1): Author: k9la@frontier.com; Date: Sat, 30 Oct 2010 22:31:57 +0000 (UTC); Greg, I don't see anything out of the ordinary in the various data. It's just another chapter in the best-seller The Mysteries of Topband Propagation. I will make one comment, though. It seems like l; /archives//html/Topband/2010-10/msg00142.html (6,902 bytes)
2. Topband: propagation on 160m (score: 1): Author: k9la@frontier.com; Date: Tue, 23 Nov 2010 19:47:20 +0000 (UTC); Rick, Our propagation prediction programs generally do not go below 80m for several reasons, the biggest being the effect of the magnetic field on propagation (specifically refraction, absorption, an; /archives//html/Topband/2010-11/msg00091.html (7,005 bytes)
3. Re: Topband: propagation on 160m (score: 1): Author: k9la@frontier.com; Date: Wed, 24 Nov 2010 03:04:11 +0000 (UTC); Rick, Good comment. Going through the northern auroral zone generally is best with a low K index. And of course there are exceptions to this - which makes 160m so interesting. Carl K9LA _____________; /archives//html/Topband/2010-11/msg00094.html (7,064 bytes)
4. Re: Topband: Do Short Beverages Work? (score: 1): Author: k9la@frontier.com; Date: Wed, 26 Jan 2011 01:06:26 +0000 (UTC); Hi to everyone, I have a short (300ft) Beverage pointed ENE from my northeast Indiana QTH. Sometimes it helps with EU and sometimes it doesn't. I believe the cause of this variability is that noise d; /archives//html/Topband/2011-01/msg00150.html (7,978 bytes)
5. Re: Topband: Ionization before Japan's seismic event (score: 1): Author: k9la@frontier.com; Date: Thu, 19 May 2011 14:36:08 +0000 (UTC); Brian N9ADG posted: There are quite a few papers in the technical literature analyzing the ionospheric signature of an earthquake (for example, I have papers on the M9.3 December 2004 Sumatra event,; /archives//html/Topband/2011-05/msg00059.html (7,675 bytes)
6. Topband: 160-Meter propagation (score: 1): Author: k9la@frontier.com; Date: Thu, 8 Dec 2011 17:03:41 +0000 (UTC); Topbander enthusiasts, On Dec 5 Brian VE7JKZ asked about solar flux in relation to 160-Meter propagation and wondered about solar min versus solar max. On Dec 6 Bob W7RH wondered if anyone has looked; /archives//html/Topband/2011-12/msg00157.html (9,186 bytes)
7. Topband: solar max vs solar min (score: 1): Author: k9la@frontier.com; Date: Fri, 9 Dec 2011 01:42:51 +0000 (UTC); topbanders, In response to my posting, Per SM2LIY commented that the polar path at higher solar activity does not work good on topband. He is corret, and I should have added that qualifier. Carl K9LA; /archives//html/Topband/2011-12/msg00160.html (6,504 bytes)
8. Re: Topband: "Artificial" Propagation...? (score: 1): Author: k9la@frontier.com; Date: Sun, 11 Mar 2012 02:10:43 +0000 (UTC); The peak of the nighttime E region is around 110 km, so 100 km is not too far below the E region. The lower E region is also where most absorption at night occurs on 160m. More to the point, refract; /archives//html/Topband/2012-03/msg00016.html (7,515 bytes)
9. Topband: what form of propagation? (score: 1): Author: "k9la@frontier.com" <k9la@frontier.com>; Date: Mon, 8 Oct 2012 17:03:39 -0700 (PDT); Jim (K9YC), You asked : So I'm wondering what form of propagation this is at this time of day? Could it be ordinary ground wave? Several years ago I wondered about that, too, since I can easily w; /archives//html/Topband/2012-10/msg00198.html (7,909 bytes)
10. Topband: long daytime propagation (score: 1): Author: "k9la@frontier.com" <k9la@frontier.com>; Date: Tue, 9 Oct 2012 08:58:14 -0700 (PDT); Arthur KB3FJO said: . . . and achieved long-distance propagation by way of a signal that was reflected or refracted by the bottom of the D layer, and so didn't suffer the absorption that low-frequen; /archives//html/Topband/2012-10/msg00207.html (8,886 bytes)
11. Topband: HFTA, Radio Arcala, general comments (score: 1): Author: "k9la@frontier.com" <k9la@frontier.com>; Date: Wed, 24 Oct 2012 17:23:17 -0700 (PDT); My comments follow on three topics that have been brought up, HFTA - It can import the elevation angle files generated from IONCAP/VOACAP that Dean N6BV produced. HFTA does not have an ionospheric; /archives//html/Topband/2012-10/msg00317.html (8,139 bytes)
12. Topband: Radio Arcala, HFTA, elevation angles (score: 1): Author: "k9la@frontier.com" <k9la@frontier.com>; Date: Thu, 25 Oct 2012 05:32:46 -0700 (PDT); More comments. Radio Arcala My only experience with them is in CQ WW CW a couple years ago. There was another OH up that a way running a vertically polarized antenna (I don't remember at the moment i; /archives//html/Topband/2012-10/msg00329.html (9,192 bytes)
13. Topband: PS0T (score: 1): Author: "k9la@frontier.com" <k9la@frontier.com>; Date: Thu, 8 Nov 2012 18:43:48 -0800 (PST); Rick N6PE, You said "I hope all the propagation programs are wrong, otherwise there doesn't appear to be much chance to work them from my S-8 noise level in W6 land hi hi" Your propagation predic; /archives//html/Topband/2012-11/msg00095.html (7,513 bytes)
14. Topband: 160m - better at solar max or solar min? (score: 1): Author: "k9la@frontier.com" <k9la@frontier.com>; Date: Tue, 27 Nov 2012 17:54:40 -0800 (PST); Eddy, You said: "Perhaps high solar activity IS really & truly the bane of 160-meters, after all..." That's a reasonable conclusion based solely on our observations. But it's interesting to bring; /archives//html/Topband/2012-11/msg00413.html (9,036 bytes)
15. Topband: one-way propagation (score: 1): Author: "k9la@frontier.com" <k9la@frontier.com>; Date: Mon, 3 Dec 2012 10:09:45 -0800 (PST); Jim K9YC asked about other possible mechanisms besides atmospheric noise to account for one-way propagation on 160-Meters. For the record, I also believe atmospheric noise (and even man-made noise as; /archives//html/Topband/2012-12/msg00073.html (9,240 bytes)
16. Topband: your observations of 3 different events (score: 1): Author: "k9la@frontier.com" <k9la@frontier.com>; Date: Mon, 3 Dec 2012 16:51:09 -0800 (PST); Jose, Your observations of 3 different events (polar propagation, 80m in the afternoon, and LP on 160m) are certainly interesting. I think I understand what it takes for the "SW at sunrise" and the; /archives//html/Topband/2012-12/msg00089.html (7,349 bytes)
17. Topband: weird propagation (score: 1): Author: "k9la@frontier.com" <k9la@frontier.com>; Date: Mon, 10 Dec 2012 13:11:15 -0800 (PST); It would be good to pay heed to N7DF's e-mail about possible improved propagation when the IMF turns south. Two examples that come to mind are skewed paths (reflection/refraction from the intense i; /archives//html/Topband/2012-12/msg00291.html (7,320 bytes)
18. Topband: solar wind, auroral oval images, D-region bite-outs (score: 1): Author: "k9la@frontier.com" <k9la@frontier.com>; Date: Wed, 23 Jan 2013 18:17:35 -0800 (PST); Hi everyone, I would think that there's a high correlation between the polarity of the IMF and the K/A indices, so this polarity may not tell us any more than the K/A indices. There is a topbander; /archives//html/Topband/2013-01/msg00170.html (8,686 bytes)
19. Topband: auroral images (score: 1): Author: "k9la@frontier.com" <k9la@frontier.com>; Date: Thu, 24 Jan 2013 10:06:55 -0800 (PST); Paul N1BUG commented: "While on the subject, I never have liked, and still do not, the ever popular NOAA POES Auroral Activity plots at http://www.swpc.noaa.gov/pmap/index.html. These have to me prov; /archives//html/Topband/2013-01/msg00182.html (8,783 bytes)

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