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21. TopBand: Beverage Box Hum (score: 1): Author: W8JITom@aol.com (W8JITom@aol.com); Date: Sat, 11 Jan 1997 12:44:46 -0500 (EST); I wonder if you are using the simple method of just ghrounding one wire at the far end for reflection?? If so, and if you want greatly improved performance, use a real reflection transformer at the f; /archives//html/Topband/1997-01/msg00210.html (8,357 bytes)
22. TopBand: Slinky availability (score: 1): Author: W8JITom@aol.com (W8JITom@aol.com); Date: Tue, 14 Jan 1997 18:05:34 -0500 (EST); Why go through all that mess and expense when lumped inductors every 1/8 wl or so provide the same or better results? 73 Tom -- FAQ on WWW: http://www.contesting.com/topband.html Submissions: topband; /archives//html/Topband/1997-01/msg00247.html (7,246 bytes)
23. TopBand: Slow wave antennas (score: 1): Author: W8JITom@aol.com (W8JITom@aol.com); Date: Wed, 15 Jan 1997 14:12:03 -0500 (EST); Let me describe quickly what the helical winding or lumped loading does to the antenna, and what to watch out for. All any method of loading does is slow the wave in the antenna antenna down. It redu; /archives//html/Topband/1997-01/msg00259.html (9,605 bytes)
24. TopBand: Re: Slow wave antennas (score: 1): Author: W8JITom@aol.com (W8JITom@aol.com); Date: Thu, 16 Jan 1997 10:07:46 -0500 (EST); Carl, This really isn't an antenna forum so this'll be my last on this..... That was my point. A slinky antenna depends on correct phase and current distribution, just as any antenna does. Cramming 1; /archives//html/Topband/1997-01/msg00271.html (10,132 bytes)
25. TopBand: DX windows (score: 1): Author: W8JITom@aol.com (W8JITom@aol.com); Date: Sun, 19 Jan 1997 01:05:57 -0500 (EST); How about a smaller DX only Window, maybe 5kHz or ten Khz, with USA operation kept outside the DX area. Who the heck established the half-@$$*& "plan" we have? As long as we keep the "system" that wa; /archives//html/Topband/1997-01/msg00308.html (7,523 bytes)
26. TopBand: DX windows (score: 1): Author: W8JITom@aol.com (W8JITom@aol.com); Date: Sun, 19 Jan 1997 10:35:26 -0500 (EST); When I worked him, he was S9. Because of confusion with the "band plan" three guys were on top of him when he sent my report. Even with an S 9 signal, I had to wait until everyone quit QRMing him and; /archives//html/Topband/1997-01/msg00315.html (8,583 bytes)
27. TopBand: HEARD better on xmit antenna, propagation (score: 1): Author: W8JITom@aol.com (W8JITom@aol.com); Date: Thu, 23 Jan 1997 03:04:28 -0500 (EST); If I was there I would have foamed also. Power loss is largely affected by current density, losses are I *squared* R. When charge movement is spread out over a large area, losses are greatly reduced; /archives//html/Topband/1997-01/msg00403.html (10,235 bytes)
28. TopBand: HEARD Report - Wednesday 1/22/97 (score: 1): Author: W8JITom@aol.com (W8JITom@aol.com); Date: Fri, 24 Jan 1997 13:02:07 -0500 (EST); Interesting report Pete. I had exactly the opposite results here. He was in earlier (but not copyable) on the NE array, and peaked later and better SE at about the same time time you heard him SE. St; /archives//html/Topband/1997-01/msg00430.html (7,627 bytes)
29. TopBand: Yuri propagation (score: 1): Author: W8JITom@aol.com (W8JITom@aol.com); Date: Fri, 24 Jan 1997 14:54:53 -0500 (EST); Hi Yuri. 1.) Because I've never experienced anything behaving like tropo-ducting on ten meters, let alone 160. 2.) Because even twenty meter propagation behaves much differently than 160 meter propag; /archives//html/Topband/1997-01/msg00435.html (7,610 bytes)
30. TopBand: Re: AM Broadcast Interference (score: 1): Author: W8JITom@aol.com (W8JITom@aol.com); Date: Tue, 3 Dec 1996 17:06:49 -0500; Hi Dave, We can be sure these signals are mixing products. The only thing we can not be sure of is where they mix. I think a simple answer is out of the question. I have personally observed mixing pr; /archives//html/Topband/1996-12/msg00053.html (9,320 bytes)
31. TopBand: Bad spurs/parasitics (score: 1): Author: W8JITom@aol.com (W8JITom@aol.com); Date: Mon, 9 Dec 1996 14:06:32 -0500; Hi Tree, I discovered this problem with my IC-751A when using external antennas. They use a PIN diode with only a few volts of bias to hold off the external antenna connection. If the RF voltage on t; /archives//html/Topband/1996-12/msg00152.html (9,047 bytes)
32. TopBand: Spurs, etc (score: 1): Author: W8JITom@aol.com (W8JITom@aol.com); Date: Tue, 10 Dec 1996 12:31:41 -0500; These was some discussion on cq-contest about operating zero beat or next to the band edge. I'd like to point out again that under the FCC's rules, the operator is required by law to correct the prob; /archives//html/Topband/1996-12/msg00173.html (10,077 bytes)
33. TopBand: Proximity to Trees (score: 1): Author: W8JITom@aol.com (W8JITom@aol.com); Date: Sat, 14 Dec 1996 09:29:34 -0500; It seems to me a tree would be a useless antenna. I've never observed trees to affect FS readings except at VHF and microwave. The attenuation is greater as frequency increases. Roy Lewallen W7EL sai; /archives//html/Topband/1996-12/msg00240.html (9,300 bytes)
34. TopBand: Topband - Proximity to trees (score: 1): Author: W8JITom@aol.com (W8JITom@aol.com); Date: Sun, 15 Dec 1996 09:43:54 -0500; The primary problem would be the nearfield coupling via the electric field to the tree. It's like a "capacitance problem" in this case, rather than a radiation field problem. The problem would be wor; /archives//html/Topband/1996-12/msg00258.html (8,406 bytes)
35. TopBand: ja report (score: 1): Author: W8JITom@aol.com (W8JITom@aol.com); Date: Sun, 15 Dec 1996 20:29:15 -0500; Hi Robin JA codx stunk here in Georgia, I worked only three JA's today. They were about five to ten dB weaker than normal with no sunrise peak, and deep QSB. The path was more north than normal, usua; /archives//html/Topband/1996-12/msg00268.html (7,514 bytes)
36. TopBand: CLIPPERTON L PROBLEM (score: 1): Author: W8JITom@aol.com (W8JITom@aol.com); Date: Sun, 15 Dec 1996 22:28:05 -0500; It's the doorknobs drifting. They are not NPO (low drift) style capacitors, The ITT Jennings are the worse ones, and HEC (High Energy Corp) are better. Drift depends on the batch of clay they use to; /archives//html/Topband/1996-12/msg00270.html (7,987 bytes)
37. TopBand: CLIPPERTON L PROBLEM (score: 1): Author: W8JITom@aol.com (W8JITom@aol.com); Date: Tue, 17 Dec 1996 08:21:37 -0500; Hi Yuri, All Dentrons had that problem. ZLet me give you some insight into what I saw when I went to Twinsburg as a consultant. Amplifiers were prototyped by some pretty good builders with the instru; /archives//html/Topband/1996-12/msg00304.html (10,462 bytes)
38. TopBand: Drift Net Beacons (score: 1): Author: W8JITom@aol.com (W8JITom@aol.com); Date: Sun, 22 Dec 1996 03:14:12 -0500; Some of the drift net becons are harmonics of NDB aircraft markers. The Paducha Ky FIO marker was audible in Atlanta for over a month until the FAA finally repaired it. It was a 25 watt transmitter o; /archives//html/Topband/1996-12/msg00380.html (7,253 bytes)
39. TopBand: drift net beacons (score: 1): Author: W8JITom@aol.com (W8JITom@aol.com); Date: Tue, 24 Dec 1996 13:07:06 -0500; You are fortunate. One W7 had to keep flying up to an airport about 100 miles from him (in AZ) and turning one down. A week later someone would turn it back up. The problem with the NDB's is two fold; /archives//html/Topband/1996-12/msg00432.html (8,308 bytes)
40. TopBand: Fence wire (score: 1): Author: W8JITom@aol.com (W8JITom@aol.com); Date: Sat, 28 Dec 1996 16:19:38 -0500; Someone with NEC should model fence wire as cad or zinc plated wire. Roy Lewallen, W7EL, did so when we were comparing measured vs calculated current in a Beverage and Roy indicated it increased curr; /archives//html/Topband/1996-12/msg00494.html (8,054 bytes)

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