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Total 21 documents matching your query.

1. Topband: beverage lobes (score: 1): Author: Telegrapher9@aol.com; Date: Sat, 6 Jan 2007 18:42:58 EST; A couple of questions for the Beverage folks. Are the high angle lobes a problem? Has anyone tried stagered Beverages to suppress the high angle lobes? Dave WX7G _____________________________________; /archives//html/Topband/2007-01/msg00080.html (6,530 bytes)
2. Re: Topband: beverage lobes (score: 1): Author: k3bu@optonline.net; Date: Sun, 07 Jan 2007 05:17:55 +0000 (GMT); Depends on the propagation and prevailing angles. Sometimes the higher angles work, sometimes low angles prevail and the long Beverages do wonders. Staggered Beverages narrow the horizontal lobe, to; /archives//html/Topband/2007-01/msg00085.html (7,326 bytes)
3. Re: Topband: beverage lobes (score: 1): Author: Gedking@aol.com; Date: Sun, 7 Jan 2007 08:53:43 EST; When I was in the Signal Corps at a relay station located near Livorno Italy, we used two Rohmbics staggered for dual diversity receive, to reduce fade Ed K8OT _______________________________________; /archives//html/Topband/2007-01/msg00087.html (6,829 bytes)
4. Re: Topband: beverage lobes (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Sun, 7 Jan 2007 09:31:32 -0500; Not so. Staggered Beverages can place a null almost anywhere depending on stagger distance and phase. With 180 degree phase shift you can get a null straight up (and to the sides). Generally the sta; /archives//html/Topband/2007-01/msg00089.html (7,946 bytes)
5. Re: Topband: beverage lobes (score: 1): Author: k3bu@optonline.net; Date: Mon, 08 Jan 2007 04:28:03 +0000 (GMT); IS So! Using EZNEC file example of staggered Beverages from W8JI web site, they show 79.1 deg horizontal beamwidth at 35 deg elevation max angle, gain -14.9 dB F/B 15.6 dB Removing one Beverage, the; /archives//html/Topband/2007-01/msg00108.html (8,720 bytes)
6. Re: Topband: beverage lobes (score: 1): Author: "Richard (Rick) Karlquist" <richard@karlquist.com>; Date: Mon, 8 Jan 2007 09:24:54 -0800; Maybe long beverages work at your QTH. I have tried installing a relay at the 400 ft point of a longer beverage. I have listened on the beverage and toggled the relay. I get no benefit out of more t; /archives//html/Topband/2007-01/msg00117.html (8,046 bytes)
7. Re: Topband: beverage lobes (score: 1): Author: Larry Molitor <w7iuv@yahoo.com>; Date: Mon, 8 Jan 2007 10:58:36 -0800 (PST); "Richard (Rick) Karlquist" <richard@karlquist.com> wrote:I once tried a 1300 ft beverage. It needed no terminating resistor to get very high F/B ratio because the signal to be rejected was totally di; /archives//html/Topband/2007-01/msg00120.html (9,001 bytes)
8. Re: Topband: beverage lobes (score: 1): Author: k3bu@optonline.net; Date: Tue, 09 Jan 2007 00:06:40 +0000 (GMT); One has to realize the properties of the long Beverages, they lower the vertical angle and narrow the horizontal beamwidth. For example (according to EZNEC) going from 500 ft Beverage to 2000 ft, V; /archives//html/Topband/2007-01/msg00129.html (10,022 bytes)
9. Re: Topband: beverage lobes (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Mon, 8 Jan 2007 19:29:03 -0500; Hi Larry, I wonder if you had both antennas up at the same time and did A B comparisons, or if this is by feeling or memory? YMMV is certainly the concept in play here. I have run Beverages from 180; /archives//html/Topband/2007-01/msg00130.html (10,251 bytes)
10. Re: Topband: beverage lobes (score: 1): Author: "Rick Karlquist" <richard@karlquist.com>; Date: Mon, 8 Jan 2007 17:03:59 -0800 (PST); That is very interesting, and certainly something to watch out for. I will keep this in mind if I manage to set up beverages in a low conductivity location. The skew issue has discouraged me from try; /archives//html/Topband/2007-01/msg00131.html (9,691 bytes)
11. Re: Topband: beverage lobes (score: 1): Author: Larry Molitor <w7iuv@yahoo.com>; Date: Mon, 8 Jan 2007 19:34:59 -0800 (PST); answers/comments below>>> Tom Rauch <w8ji@contesting.com> wrote:I wonder if you had both antennas up at the same time and did A B comparisons, or if this is by feeling or memory? Are you really sayin; /archives//html/Topband/2007-01/msg00133.html (12,547 bytes)
12. Re: Topband: beverage lobes (score: 1): Author: Larry Molitor <w7iuv@yahoo.com>; Date: Mon, 8 Jan 2007 19:48:47 -0800 (PST); The skew issue has discouraged me from trying to set up a "killer" European beverage, because out here on the left coast, Eu is often skewed.Skew is not a problem for me. When I was in AZ I never onc; /archives//html/Topband/2007-01/msg00134.html (10,026 bytes)
13. Re: Topband: beverage lobes (score: 1): Author: "Michael Tope" <W4EF@dellroy.com>; Date: Mon, 8 Jan 2007 20:02:14 -0800; I think the fly in the ointment on this debate could be ground conductivity. A beverage looks more or less like 1/2 of a 2 wire transmission line over a ground plane with the 2nd half of the transmis; /archives//html/Topband/2007-01/msg00135.html (11,793 bytes)
14. Re: Topband: beverage lobes (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Tue, 9 Jan 2007 05:29:48 -0500; It certainly sounds like you did your homework. We have to be very careful to not base opinions on "bumps in the night" where we operate a day or two between long periods of rest and conclude the ent; /archives//html/Topband/2007-01/msg00142.html (10,259 bytes)
15. Re: Topband: beverage lobes (score: 1): Author: herbs@surfvi.com; Date: Tue, 9 Jan 2007 13:07:50 -0400; It turns out The results from the Eastern Caribbean are oposite! When the skew is in JA's are sometimes as strong as NA and I can worked a dozen or more aproaching sunrise. During the skewed path ope; /archives//html/Topband/2007-01/msg00151.html (9,462 bytes)
16. Re: Topband: beverage lobes (score: 1): Author: "Jim Brown" <jim@audiosystemsgroup.com>; Date: Tue, 09 Jan 2007 09:39:16 -0800; Yes, and even when you have antennas that you can switch between, it can be tricky to tell whether the difference are caused by selective fading or the characteristics of the antenna. That takes grea; /archives//html/Topband/2007-01/msg00155.html (8,624 bytes)
17. Re: Topband: beverage lobes (score: 1): Author: Larry Molitor <w7iuv@yahoo.com>; Date: Tue, 9 Jan 2007 09:13:06 -0800 (PST); Tom Rauch <w8ji@contesting.com> wrote: Since I haven't been in Washington and operated weeks and weeks watching antennas, Likewise I have never operated Topband from the eastern seaboard. (But I have; /archives//html/Topband/2007-01/msg00157.html (11,223 bytes)
18. Re: Topband: beverage lobes (score: 1): Author: Joe Giacobello <k2xx@swva.net>; Date: Tue, 09 Jan 2007 13:32:31 -0500; When observers are making judgments on arrival angles, are they basing their judgments on which of several different types of antennas with different TOAs produces the loudest received signal? 73, Jo; /archives//html/Topband/2007-01/msg00160.html (9,192 bytes)
19. Re: Topband: beverage lobes (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Tue, 9 Jan 2007 14:45:04 -0500; I only do that on transmitting antennas, and I never base my opinions on a single weekend once a year during a contest. With station after station coming at you that just isn't the place to form acc; /archives//html/Topband/2007-01/msg00162.html (10,096 bytes)
20. Re: Topband: beverage lobes (score: 1): Author: David Gilbert <xdavid@cis-broadband.com>; Date: Tue, 09 Jan 2007 14:46:04 -0700; That's quite interesting. Bob Brown, NM7M, once told me that for my location (southern Arizona near the Mexican border) vertical polarization had an 11 (eleven!) db advantage versus horizontal polari; /archives//html/Topband/2007-01/msg00168.html (9,513 bytes)

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