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1. Topband: Flag Feedline Isolation (score: 1): Author: n7cl@mmsi.com (Eric Gustafson); Date: Wed, 17 May 2000 09:06:48 -0700; The amplifier may be a good idea for the gain if it is needed to set the system noise figure below the minimum requirement. But the isolation will still be primarily a function of the transformer pr; /archives//html/Topband/2000-05/msg00038.html (7,084 bytes)
2. Topband: T antenna or Cap hat? (score: 1): Author: n7cl@mmsi.com (Eric Gustafson); Date: Tue, 22 Feb 2000 11:50:10 -0700; Hi Steve, It sounds to me as though you should be looking for a bad electrical connection. This would have to be either between the sections of the vertical conductor or between the vertical and the; /archives//html/Topband/2000-02/msg00157.html (9,264 bytes)
3. Topband: Re Poynting Vector question (score: 1): Author: n7cl@mmsi.com (Eric Gustafson); Date: Thu, 13 Jan 2000 13:50:27 -0700; (Guys, I'm getting many messages that are essentially the same as this one so I'm only posting it. If you would like to pursue CFA, I suggest the Antennex site is the place to do it and not here...TU; /archives//html/Topband/2000-01/msg00098.html (8,150 bytes)
4. Topband: vertical take off angle (score: 1): Author: n7cl@mmsi.com (Eric Gustafson); Date: Thu, 27 Jan 2000 10:43:24 -0700; Hi Rob, I just ran your inverted "L" through EZNEC V2 (NEC2 engine). Here is what I got using "good" ground constants (5 mS, e=13), and 64 foot radials of #12 wire on the earth's surface. Radials Gai; /archives//html/Topband/2000-01/msg00226.html (10,603 bytes)
5. Topband: Beverage Ground (score: 1): Author: n7cl@mmsi.com (Eric Gustafson); Date: Wed, 22 Dec 1999 14:04:56 -0700; Hi Bill, If you are talking about a single 1/4 wave piece of wire, it is best if it is in alignment with the rest of the beverage. This is no real sacrifice as the apparent length of the beverage wil; /archives//html/Topband/1999-12/msg00271.html (8,350 bytes)
6. Topband: desperate newcomer modeling (score: 1): Author: n7cl@mmsi.com (Eric Gustafson); Date: Wed, 29 Dec 1999 16:25:17 -0700; Hi Kele, Be careful in drawing conclusions from these models. Both of these antennas are strongly coupled to earth in the near field. But none of the NEC based programs that I have dealt with so far; /archives//html/Topband/1999-12/msg00320.html (7,811 bytes)
7. Topband: Our Friend Bob Garrett, K3UL (score: 1): Author: n7cl@mmsi.com (Eric Gustafson); Date: Thu, 20 May 1999 10:19:18 -0700; Jeff, Thanks very much for the Bob Garrett posting. It reminds me (and probably many others) why we enjoy this hobby so much. Ham radio (particularly the CW or keyboard modes) permits us to communica; /archives//html/Topband/1999-05/msg00025.html (8,735 bytes)
8. TopBand: Questions... (score: 1): Author: N7CL@mmsi.com (Eric Gustafson); Date: Sun, 1 Nov 1998 10:59:18 -0700; Mark, I'm not sure what you mean by "in the center of the receive antenna". But in the past I have found the following useful when operating low bands from a restricted space location. Get one of the; /archives//html/Topband/1998-11/msg00008.html (7,184 bytes)
9. TopBand: Top Loaded Delta Loop (score: 1): Author: n7cl@mmsi.com (Eric Gustafson); Date: Mon, 26 Oct 1998 10:41:08 -0700; <19981025.224338.4687.0.k6se@juno.com> Sender: owner-topband@contesting.com Precedence: bulk X-List-Info: http://www.contesting.com/topband.html X-Sponsor: W4AN, KM3T, N5KO & AD1C Hi Earl, There is a; /archives//html/Topband/1998-10/msg00132.html (8,057 bytes)
10. TopBand: stranded or solid ? (score: 1): Author: n7cl@mmsi.com (Eric Gustafson Courtesy Account); Date: Mon, 20 Jul 1998 14:22:21 -0700; To: <topband@contesting.com> Chris, It really doesn't matter. Either will do fine. I have used galvanized electric fence wire (single strand solid) because it was cheap and expedient. It worked fine.; /archives//html/Topband/1998-07/msg00075.html (8,157 bytes)
11. TopBand: 9M0C Card (score: 1): Author: n7cl@mmsi.com (Eric Gustafson Courtesy Account); Date: Tue, 26 May 1998 12:55:28 -0700; To: <topband@contesting.com> Congratulations! But what do you need more radials for in north TX? Ground is supposed to be real good there. ;-) 73, Eric N7CL -- FAQ on WWW: http://www.contesting.com/t; /archives//html/Topband/1998-05/msg00084.html (7,014 bytes)
12. TopBand: EWEs (score: 1): Author: n7cl@mmsi.com (Eric Gustafson Courtesy Account); Date: Thu, 2 Apr 1998 14:25:39 -0700; To: <topband@contesting.com> The operative word in my statement was "perfect". Even sea water isn't actually perfect. Also, even though I didn't make it very clear, I was describing what happens to a; /archives//html/Topband/1998-04/msg00015.html (13,118 bytes)
13. TopBand: Linear loading (score: 1): Author: n7cl@mmsi.com (Eric Gustafson Courtesy Account); Date: Tue, 14 Apr 1998 07:42:32 -0700; To: <topband@contesting.com> Dave is quite right. Unless the radials are extremely long (longer than 1/4 wave), or are themselves radiating (and therefore acting as antenna, not ground), there is not; /archives//html/Topband/1998-04/msg00160.html (7,723 bytes)
14. TopBand: KZ5MM Noisy Beverage (score: 1): Author: n7cl@mmsi.com (Eric Gustafson Courtesy Account); Date: Thu, 5 Mar 1998 15:40:11 -0700; To: <topband@contesting.com> I can think of at least one good reason _NOT_ to run much of the beverage near a transmitting vertical which is over ground which has been improved with many adequately; /archives//html/Topband/1998-03/msg00075.html (9,951 bytes)
15. TopBand: Low band signals in the NYC tunnels. (score: 1): Author: n7cl@mmsi.com (Eric Gustafson Courtesy Account); Date: Mon, 9 Mar 1998 08:46:45 -0700; Very interesting post Yuri! I'm going to be forced to respond to it twice under two separate subject references. I think the mystery about the behaviour in the tunnel is possibly less mysterious than; /archives//html/Topband/1998-03/msg00138.html (9,722 bytes)
16. TopBand: Elevated GP vs. Vertical Antennas (score: 1): Author: n7cl@mmsi.com (Eric Gustafson Courtesy Account); Date: Fri, 13 Mar 1998 17:14:28 -0700; NOTICE! Long boring technical discussion to follow. Do not read if you don't care about ground systems. Carl, The above is a very interesting statement. Let me see if I can make use of it to illumina; /archives//html/Topband/1998-03/msg00197.html (17,882 bytes)
17. TopBand: Elevated GP vs. Vertical Antennas (score: 1): Author: n7cl@mmsi.com (Eric Gustafson Courtesy Account); Date: Sat, 14 Mar 1998 10:59:04 -0700; To: <topband@contesting.com> This experiment has been done a number of times by various researchers for various organizations ranging from the Broadcast Industry and Universities to the Military (wh; /archives//html/Topband/1998-03/msg00207.html (13,868 bytes)
18. TopBand: Elevated GP vs. Vertical Antennas (score: 1): Author: n7cl@mmsi.com (Eric Gustafson Courtesy Account); Date: Sat, 14 Mar 1998 11:52:19 -0700; To: <topband@contesting.com> Snip... Hi Yuri, In all those books, when they changed the ground conductivity, they changed it everywhere. Not just for a 1/4 wavelength radius around the base of the r; /archives//html/Topband/1998-03/msg00209.html (13,820 bytes)
19. TopBand: Elevated GP vs. Vertical Antennas (score: 1): Author: n7cl@mmsi.com (Eric Gustafson Courtesy Account); Date: Sun, 15 Mar 1998 10:29:22 -0700; To: <topband@contesting.com> Sure Earl, I thought I had done so in the original post. But here is what I had in mind when I wrote that. 1. Correctly sized Large enough to extend to the edge of or ju; /archives//html/Topband/1998-03/msg00218.html (11,851 bytes)
20. TopBand: Elevated GP vs. Vertical Antennas (score: 1): Author: n7cl@mmsi.com (Eric Gustafson Courtesy Account); Date: Mon, 16 Mar 1998 18:45:50 -0700; To: <topband@contesting.com> Hi Carl, Thanks, but I don't feel constrained to be limited to brevity on this subject - yet. Probably soon though... No. I wasn't saying that at all. The only published; /archives//html/Topband/1998-03/msg00242.html (17,218 bytes)

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