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1. Topband: Detuning towers (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Mon, 20 Jan 2003 12:12:34 -0500; Is there a rule of thumb on how far away from a tower a receiving antenna needs to be, to avoid the need to detune it? I am contemplating a small 160m ving antenna that will be close to 300 feet from; /archives//html/Topband/2003-01/msg00162.html (7,391 bytes)
2. Topband: Electric Fence QRM (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Sun, 01 Dec 2002 09:49:31 -0500; I found a very loud emitter here - S9+20 buzz when on, nothing when off, a few seconds in each state. Turned out to be an electrically heated dog dish with a bad thermostat, located 100 feet from one; /archives//html/Topband/2002-12/msg00007.html (8,219 bytes)
3. Topband: Electric Fence QRM (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Sun, 01 Dec 2002 11:06:12 -0500; A neat simple superhet operating in the aircraft band. I borrowed one briefly from KA9FOX, and it appeared to me that it would be easy to feed the receiver with a small yagi or Moxon rectangle to mak; /archives//html/Topband/2002-12/msg00008.html (7,730 bytes)
4. Topband: Tracking noise (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Sun, 01 Dec 2002 11:15:13 -0500; I discovered that the thing that was obliterating the upper end of the AM broadcast band in my truck was the car cord for my cellphone. As soon as I unplugged it the chirps, whines and howls all went; /archives//html/Topband/2002-12/msg00009.html (7,344 bytes)
5. Topband: ANC-4 noise canceller (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Tue, 03 Dec 2002 16:38:30 -0500; This inspires me to ask a question, the answer to which I should probably know. Suppose that the noise source is something like an arcing electric fence, where the RF is being generated at one locati; /archives//html/Topband/2002-12/msg00043.html (7,900 bytes)
6. Topband: 4. MFJ noise canceller (Donald Chester) (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Thu, 05 Dec 2002 08:42:05 -0500; While cruising this site I found a reference to another phaser design (Quantum) specifically optimized for 500-2000KHz. Check out http://www.dx-tools.com/Phaser.htm. Has anyone ever tried one of thes; /archives//html/Topband/2002-12/msg00083.html (7,662 bytes)
7. Topband: Neophyte questions (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Sun, 08 Dec 2002 12:23:55 -0500; I was surprised during the ARRL 160 contest not to hear many DX stations. Heck, I didn't even hear other people working DX from the mid-Atlantic states. Was there a real shortage this time? Also, isn; /archives//html/Topband/2002-12/msg00111.html (6,421 bytes)
8. Topband: Finding powerline noise (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Tue, 10 Dec 2002 08:02:41 -0500; Based on my experience over the last several years, I think this is mistaken. My worst noise sources are the old-style insulators on slack spans, stretches of high-voltage feeder that hang loosely (h; /archives//html/Topband/2002-12/msg00151.html (9,538 bytes)
9. Topband: ARRL 160 contest (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Tue, 10 Dec 2002 10:56:44 -0500; Actually, I was kinda asking both questions. I think the underlying thought may have been "maybe I didn't hear more DX because the DX window seemed to be nonexistent. Jeff's message about the DX wind; /archives//html/Topband/2002-12/msg00154.html (8,655 bytes)
10. Topband: ARRL 160 contest -- correction (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Tue, 10 Dec 2002 10:58:34 -0500; Well, I thought I knew, but I should have checked first. The 75M DX window IS in the bandplan, but the one on 160 is not. If anything I'd think there would be more need on 160. What gives? 73, Pete N; /archives//html/Topband/2002-12/msg00155.html (6,409 bytes)
11. Topband: Mark 5 clicks (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Tue, 10 Dec 2002 16:10:06 -0500; Just for fun, I redid the click check on my Mark 5, trying to follow the protocol suggested by Earl, K6SE. The test receiver is a TS-930 with cascaded Inrad 400 Hz. filters. Earl wrote "Before any mo; /archives//html/Topband/2002-12/msg00169.html (7,315 bytes)
12. Topband: K2ZJ Beverage Box with K9AY loop (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Sun, 22 Dec 2002 12:34:01 -0500; Years ago, I bought a K2ZJ Beverage Box with the built-in pre-amp. Getting a long-enough beverage onto my property in the right direction has proved difficult, so I'm thinking about going to a K9AY l; /archives//html/Topband/2002-12/msg00262.html (6,874 bytes)
13. Topband: K2ZJ Beverage Box schematic needed (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Mon, 23 Dec 2002 07:31:17 -0500; LA5HE and I are both in need of schematics and parts lists for our K2ZJ Beverage Boxes. Rag, in particular, has two sick ones he needs to troubleshoot. The only e-mail address that anyone has come up; /archives//html/Topband/2002-12/msg00267.html (6,770 bytes)
14. Topband: Stew Perry Spots!!!! (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Sun, 29 Dec 2002 17:30:58 -0500; If someone wants to get on casually during the contest and use spots, as long as he doesn't submit a log, or submits a check log, should we care? By the same token, if a competitor wants to set up hi; /archives//html/Topband/2002-12/msg00293.html (7,606 bytes)
15. Topband: W8JI Web site (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Thu, 14 Nov 2002 21:37:49 -0500; For those who have been asking, or were concerned, W8JI has asked me to pass along that his web site host had a server problem, which resulted in his site being taken off. It will be coming back up a; /archives//html/Topband/2002-11/msg00084.html (6,374 bytes)
16. Topband: FT-1000D External Receive (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Fri, 15 Nov 2002 08:32:00 -0500; I've asked this question in the past on towertalk, and been strongly advised to use protectors, particularly in an SO2R situation where any built-in relay protection is not a factor. You might check; /archives//html/Topband/2002-11/msg00089.html (7,995 bytes)
17. Topband: FT-1000D External Receive (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Sat, 16 Nov 2002 02:52:01 -0500; These are neat units, and seem to work very well. A somewhat trickier case is the one in an SO2R station, where you might be listening on the Beverage while transmitting on the other radio. I asked t; /archives//html/Topband/2002-11/msg00096.html (7,432 bytes)
18. Topband: Center support on K9AY Loop (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Thu, 21 Nov 2002 16:15:16 -0500; Mike, I'm a little skeptical about this technique. Have you tried allowing the direct connection, but interposing a few-ohm load in the bottom most segment of the tower (and make that segment very sh; /archives//html/Topband/2002-11/msg00124.html (8,108 bytes)
19. Topband: K9AY Center support (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Fri, 22 Nov 2002 06:57:07 -0500; I keep reading about this, but have not seen any practical "how to" information that is detailed enough for me to understand. Is the objective of detuning simply to move the resonance out of the 160M; /archives//html/Topband/2002-11/msg00134.html (7,590 bytes)
20. Topband: K9AY Center support (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Fri, 22 Nov 2002 08:16:47 -0500; OK, I can visualize how this might work, but I'm missing a couple of steps. On a shunt fed tower, for example, where is the "drop wire" connected to the system? Is it tuned by changing the length, or; /archives//html/Topband/2002-11/msg00136.html (7,617 bytes)

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