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1. Topband: Skewed Propagation Paths (score: 1): Author: charlesh3@msn.com (Charles Hutton); Date: Thu, 16 Jan 2003 16:43:50 -0500; Thomas: Long term direction finding studies at MF have found excellent correlation of received bearing versus Great Circle bearing on paths including high latitude trans-Atlantic paths. Did you mean; /archives//html/Topband/2003-01/msg00095.html (7,192 bytes)
2. Topband: Is There A Post Sunrise Peak? (score: 1): Author: charlesh3@msn.com (Charles Hutton); Date: Fri, 17 Jan 2003 15:02:46 -0500; Hi Brian: As someone has already pointed out, Nick Hall-Patch did the studies in QEX to quantify how normal (repeatable) and significant this effect is. Strong MW broadcasters make a great beacon to; /archives//html/Topband/2003-01/msg00121.html (7,838 bytes)
3. Topband: Is There A Post Sunrise Peak? (score: 1): Author: charlesh3@msn.com (Charles Hutton); Date: Fri, 17 Jan 2003 19:30:23 -0500; Earl: Plots of signal strength (not S/N) show that there is often a quite significant increase in signal strength at local sunrise of the DX target to the west. See the Nick Hall-Patch article in QEX; /archives//html/Topband/2003-01/msg00130.html (8,043 bytes)
4. Topband: ground testers (score: 1): Author: charlesh3@msn.com (Charles Hutton); Date: Tue, 21 Jan 2003 10:40:58 -0800; I've been looking for a portable commercial ground tester (3 point or 4 point) that measures ground resistance at RF frequencies rather than the normal near-60 Hz frequencies. Does anyone know of any; /archives//html/Topband/2003-01/msg00174.html (6,505 bytes)
5. Topband: ANC-4 noise canceller (score: 1): Author: charlesh3@msn.com (Charles Hutton); Date: Wed, 4 Dec 2002 22:03:20 -0800; If you are interested in rolling your own phasing units, take a look at this page: http://www.qsl.net/wa1ion/. While the emphasis is on MW DXing, most of the various phasing units are applicable to a; /archives//html/Topband/2002-12/msg00075.html (8,134 bytes)
6. Topband: 4. MFJ noise canceller (Donald Chester) (score: 1): Author: charlesh3@msn.com (Charles Hutton); Date: Thu, 5 Dec 2002 09:21:06 -0800; And there's also a very thorough companion article http://www.hard-core-dx.com/nordicdx/antenna/special/mfj1026.html that gives a bit more explanation. Chuck There is a simple mod for the MFJ-1025/10; /archives//html/Topband/2002-12/msg00085.html (10,986 bytes)
7. Topband: Multiple Rcvrs on a Single Beverage (score: 1): Author: charlesh3@msn.com (Charles Hutton); Date: Thu, 12 Dec 2002 19:53:27 -0500; Oh, I'm sure more than 1 person will be interested in the subject so I'll reply here. As for myself, I amplify (usually with an ARR preamp) then split with Mini Circuits 1:4 or 1:8 splitters that hav; /archives//html/Topband/2002-12/msg00192.html (6,959 bytes)
8. Topband: 160 Propagation & Weather (score: 1): Author: charlesh3@msn.com (Charles Hutton); Date: Thu, 31 Oct 2002 21:55:37 -0800; I'd agree - Kazimrovsky's paper is what is called a literature survey in my neck of the engineering world. It's also a call for further research. No new data is presented and no conclusions are drawn; /archives//html/Topband/2002-11/msg00003.html (8,901 bytes)
9. Topband: 160 Propagation & Weather (score: 1): Author: charlesh3@msn.com (Charles Hutton); Date: Sat, 02 Nov 2002 07:00:27 -0500; Hi Mike: Of course there is nothing wrong with review papers. I read them all the time for quick education and catch-up, and I'm always in need of one or the other..... But the original subject that; /archives//html/Topband/2002-11/msg00014.html (7,429 bytes)
10. Topband: Large TSTM areas as MF "wall" (score: 1): Author: charlesh3@msn.com (Charles Hutton); Date: Mon, 28 Oct 2002 22:24:42 -0500; Refraction of 160M signals by cold fronts? That's the first I've heard of this. Where might we head to read some studies about this? Any experimental data available? Chuck; /archives//html/Topband/2002-10/msg00150.html (7,001 bytes)
11. Topband: Beverage Frustrations (score: 1): Author: charlesh3@msn.com (Charles Hutton); Date: Mon, 01 Jul 2002 14:03:29 +0100; Tom: I totally agree - it would be awfully unrealistic to trust the model, and I assumed everyone would feel the same way. What I was hoping to find out is what it is that causes NEC to tell us these; /archives//html/Topband/2002-07/msg00002.html (6,564 bytes)
12. Topband: W1WCR Beverage book (score: 1): Author: charlesh3@msn.com (Charles Hutton); Date: Fri, 12 Jul 2002 21:14:40 -0700; The "cone of silence" issue brings up another topic. I first heard of the term in W1WCR's Beverage antenna book. I recall that ON4UN makes a few references to W1WCR's publication in his own book. How; /archives//html/Topband/2002-07/msg00073.html (11,830 bytes)
13. Topband: W1WCR Beverage book (score: 1): Author: charlesh3@msn.com (Charles Hutton); Date: Fri, 12 Jul 2002 21:19:58 -0700; Why worry about a eight-foot-end out of several hundred feet of wire that responds to vertically polarized signals anyway? Tom: Why would a Beverage respond to vertically polarized signals anyway? Wi; /archives//html/Topband/2002-07/msg00074.html (8,207 bytes)
14. Topband: Beverage Frustrations (score: 1): Author: charlesh3@msn.com (Charles Hutton); Date: Sun, 30 Jun 2002 02:58:01 +0100; With the most-perfect resistive termination, I agree that it seems to make no difference whether the resistor is on top or down at the ground rods. However, when I model Beverages with EZNEC and use; /archives//html/Topband/2002-06/msg00067.html (7,774 bytes)
15. Topband: E layer ionograms (score: 1): Author: "Charles Hutton" <charlesh3@msn.com>; Date: Sun, 31 Aug 2003 11:37:43 -0700; Would any of the propagation people on the list know where I can find data showing nighttime foE for a most or all of a solar cycle? Thanks, Chuck _______________________________________________ Topb; /archives//html/Topband/2003-08/msg00165.html (6,369 bytes)
16. RE: Topband: E layer ionograms (score: 1): Author: "Charles Hutton" <charlesh3@msn.com>; Date: Sun, 31 Aug 2003 18:38:20 -0700; Thanks to Carl (offlist) and Tom for the responses. Carl: I am actually looking for real data not calculated values. Part of the reason why is exactly what you mentioned; Davies' formula is only vali; /archives//html/Topband/2003-08/msg00168.html (8,684 bytes)
17. Re: Topband: impedance transformer windings (score: 1): Author: "CHARLES HUTTON" <charlesh3@msn.com>; Date: Tue, 28 Oct 2003 00:43:38 +0000; Hi Steve: One little problem is that you can't reduce things to "inductance per turn" since that is not linear. The inductance varies as the square of the number of turns. When I do the calculations,; /archives//html/Topband/2003-10/msg00155.html (9,764 bytes)
18. RE: Topband: RDF (score: 1): Author: "Charles Hutton" <charlesh3@msn.com>; Date: Tue, 11 Nov 2003 19:51:41 -0800; Try this: http://www.seed-solutions.com/gregordy/Amateur%20Radio/Experimentation/RDFMe tric.htm . Chuck I have been hunting for more information on RDF, which Tom Rauch defined the other day as "the; /archives//html/Topband/2003-11/msg00079.html (8,377 bytes)
19. RE: Topband: BCI Update (score: 1): Author: "Charles Hutton" <charlesh3@msn.com>; Date: Sat, 22 Nov 2003 11:18:57 -0800; Tom: WBIT is listed as off the air in broadcast industry lists. WWNN is listed as talk, and WLVU is "money radio". I am sure you have a Cuban station. There is talk at the beginning about the 5th Wor; /archives//html/Topband/2003-11/msg00173.html (8,873 bytes)
20. RE: Topband: BOG... (score: 1): Author: "Charles Hutton" <charlesh3@msn.com>; Date: Sun, 7 Dec 2003 20:17:40 -0800; The impedance drops greatly as the wire approaches ground. If your Beverage actually lies on ground, it's likely to have an impedance of around 200 Ohms. On grass / shrubs /etc it will likely be a bi; /archives//html/Topband/2003-12/msg00046.html (8,344 bytes)

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