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Total 17 documents matching your query.

1. Topband: RX 4 SQ Phasing (score: 1): Author: Dennis W0JX <w0jx@yahoo.com>; Date: Fri, 10 Aug 2012 07:52:22 -0700 (PDT); Bob, for a good understanding of the concepts of phasing in these RX antennas, read Chapter Seven of ON4UN's "Low Band DXing." The length of the delay lines primarily affects the placement of the nu; /archives//html/Topband/2012-08/msg00148.html (7,444 bytes)
2. Re: Topband: RX 4 SQ Phasing (score: 1): Author: Larry Molitor <w7iuv@yahoo.com>; Date: Fri, 10 Aug 2012 09:31:10 -0700 (PDT); Dennis, W0JX, is nearly correct but didn't go far enough. In the last few years I've had up several Hi-Z two element arrays, a Hi-Z 4-sq, and a Hi-Z 2-3 array. They all exhibit the same characteristi; /archives//html/Topband/2012-08/msg00154.html (9,172 bytes)
3. Re: Topband: RX 4 SQ Phasing (score: 1): Author: "Rick Karlquist" <richard@karlquist.com>; Date: Fri, 10 Aug 2012 10:59:55 -0700; A while back, I built a 4X2 low band array of receive verticals aimed at Europe via Canada, but reversible to beam over San Francisco. I could tune to 960 kHz and listen to a San Francisco station 70; /archives//html/Topband/2012-08/msg00158.html (7,944 bytes)
4. Re: Topband: RX 4 SQ Phasing (score: 1): Author: "ZR" <zr@jeremy.mv.com>; Date: Fri, 10 Aug 2012 17:38:49 -0400; I use 5 two wire Beverages for 10 directions and have good directivity down to the 175 KHz LF BCB and they are only 500-700' long. Performance seems to exceed published info. On the US BCB its like a; /archives//html/Topband/2012-08/msg00165.html (8,649 bytes)
5. Re: Topband: RX 4 SQ Phasing (score: 1): Author: "Rick Karlquist" <richard@karlquist.com>; Date: Fri, 10 Aug 2012 17:14:45 -0700; My ground is high conductivity according to the FCC map, so maybe that doesn't explain the performance. Rick N6RK _______________________________________________ UR RST IS ... ... ..9 QSB QSB - hw? B; /archives//html/Topband/2012-08/msg00167.html (7,922 bytes)
6. Re: Topband: RX 4 SQ Phasing (score: 1): Author: "ZR" <zr@jeremy.mv.com>; Date: Fri, 10 Aug 2012 20:54:31 -0400; How does it work way down into LF? Carl _______________________________________________ UR RST IS ... ... ..9 QSB QSB - hw? BK; /archives//html/Topband/2012-08/msg00168.html (8,204 bytes)
7. Re: Topband: RX 4 SQ Phasing (score: 1): Author: "Tom W8JI" <w8ji@w8ji.com>; Date: Fri, 10 Aug 2012 23:45:15 -0400; If any of us **really** had an antenna as sharp as a long Yagi, we'd need 16 or more antennas to cover useful directions. That's pretty typical behavior for a properly installed Beverage no matter w; /archives//html/Topband/2012-08/msg00174.html (8,058 bytes)
8. Re: Topband: RX 4 SQ Phasing (score: 1): Author: Pete Smith N4ZR <n4zr@contesting.com>; Date: Sat, 11 Aug 2012 08:00:30 -0400; I'm not sure I'd go too far with the FCC map. At my QTH, which is shown as average, actual ground/earth varies within a hundred feet from deep old riverbottom loam to limestone with a thin covering o; /archives//html/Topband/2012-08/msg00177.html (9,043 bytes)
9. Re: Topband: RX 4 SQ Phasing (score: 1): Author: "Steve Flood" <kk7uv@bresnan.net>; Date: Sat, 11 Aug 2012 06:55:19 -0600; You might look at your local soil surveys for better information, or contact your local NRCS office. I use the online Web Soil Survey. http://websoilsurvey.nrcs.usda.gov/app/HomePage.htm Once you se; /archives//html/Topband/2012-08/msg00178.html (8,411 bytes)
10. Re: Topband: RX 4 SQ Phasing (score: 1): Author: "Tom W8JI" <w8ji@w8ji.com>; Date: Sat, 11 Aug 2012 09:44:11 -0400; If you only use ground rods or depend on earth as a counterpoise, where you place the antenna locally can matter. With a reasonably good ground, most of the losses are in the Fresnel region outside; /archives//html/Topband/2012-08/msg00180.html (11,274 bytes)
11. Re: Topband: RX 4 SQ Phasing (score: 1): Author: "ZR" <zr@jeremy.mv.com>; Date: Sat, 11 Aug 2012 10:22:36 -0400; ** More like 24, my 70cm yagis are 15 degrees. ** That doesnt make sense since the books, etc claim virtually no directivity at a 1/4 wave. At 175 KHz a 1/4 wave is 1406'. Carl KM1H _________________; /archives//html/Topband/2012-08/msg00182.html (9,306 bytes)
12. Re: Topband: RX 4 SQ Phasing (score: 1): Author: "Tom W8JI" <w8ji@w8ji.com>; Date: Sat, 11 Aug 2012 11:43:45 -0400; I don't know what "books, etc" that comes from, but even over fairly good soil a 600-foot "Beverage" models to have about 18 dB side null and a few dB F/B at 175 kHz. It isn't in "Beverage mode", bu; /archives//html/Topband/2012-08/msg00185.html (9,016 bytes)
13. Re: Topband: RX 4 SQ Phasing (score: 1): Author: "ZR" <zr@jeremy.mv.com>; Date: Sat, 11 Aug 2012 12:40:17 -0400; This for instance http://www.aytechnologies.com/TechData/ShortBev.htm And what mode is that? Yes they work suprisingly well at LF, so well in fact that I can seperate stations on the same frequency,; /archives//html/Topband/2012-08/msg00187.html (9,847 bytes)
14. Re: Topband: RX 4 SQ Phasing (score: 1): Author: Bill Cromwell <wrcromwell@gmail.com>; Date: Sat, 11 Aug 2012 12:59:49 -0400; --snip-- Hi, My antennas are indeed special. They fit in a rectangle 100 feet long by 35 feet wide. That I can work any stations at all on 160 and hear stations on 600 meters is - *special*. I have b; /archives//html/Topband/2012-08/msg00188.html (9,283 bytes)
15. Re: Topband: RX 4 SQ Phasing (score: 1): Author: "Tom W8JI" <w8ji@w8ji.com>; Date: Sat, 11 Aug 2012 13:24:59 -0400; There isn 't enough detail in the description to understand the model and the plots fully. A 560 foot long "beverage" on 175 kHz has about 15 dB null off the sides at 5 degrees wave angle, and a few; /archives//html/Topband/2012-08/msg00189.html (10,872 bytes)
16. Re: Topband: RX 4 SQ Phasing (score: 1): Author: Chuck <charlesh3@msn.com>; Date: Sat, 11 Aug 2012 10:24:43 -0700; Please elaborate! The LF stations you are likely to receive would all be from Europe or Mediteranean countries in N. Africa. From your location, I wonder how you would get enough directivity to separ; /archives//html/Topband/2012-08/msg00190.html (8,688 bytes)
17. Re: Topband: RX 4 SQ Phasing (score: 1): Author: "Richard (Rick) Karlquist" <richard@karlquist.com>; Date: Sun, 12 Aug 2012 22:27:09 -0700; Yes, but I have also measured the current drop off with distance on my beverages and it agrees with the high conductivity assumption. Any wire beyond 400 feet on a beverage is ineffective here; I ins; /archives//html/Topband/2012-08/msg00203.html (9,275 bytes)

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