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Total 19 documents matching your query.

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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