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21. Topband: XR0X on 160 (score: 1): Author: john.w1fv@telocity.com (John Kaufmann); Date: 20 Mar 2002 15:30:27 -0800; Yes, this is basically correct. The key point is that in order to null the noise, there must be a stable RF phase relationship between the noise waveforms received in the main receive antenna feedlin; /archives//html/Topband/2002-03/msg00195.html (8,186 bytes)
22. Topband: JT1CO Paths (score: 1): Author: john.w1fv@telocity.com (John Kaufmann); Date: 22 Feb 2002 13:52:21 -0800; Those of us in the Northeast (W1/W2) should have the advantage for the sunset path to JT during this period because our sunset is roughly 45 mins earlier than W4ZV's. That gives us more darkness over; /archives//html/Topband/2002-02/msg00139.html (7,278 bytes)
23. Topband: Let's try stuff (score: 1): Author: john.w1fv@telocity.com (John Kaufmann); Date: Sun, 24 Feb 2002 16:33:11 -0500; The "standard" versions of EZNEC have the limitation of not including a ground wave component. However "EZNEC-pro (http://www.eznec.com/eznecpro.htm), which is a more sophisticated (and more expensiv; /archives//html/Topband/2002-02/msg00180.html (10,056 bytes)
24. Topband: March 1 - great conditions! (score: 1): Author: john.w1fv@telocity.com (John Kaufmann); Date: Thu, 28 Feb 2002 23:16:17 -0500; This evening (March 1) has to rate as one of the best this season. Some highlights: 5H3RK, OD5/OK1MU, and 5B4ADA were all worked and had honest 579 to 599 signals between 0230Z and 0400Z. Many Europe; /archives//html/Topband/2002-02/msg00252.html (6,251 bytes)
25. Topband: KH2K/AH0 this morning (score: 1): Author: john.w1fv@telocity.com (John Kaufmann); Date: 10 Jan 2002 11:21:49 -0800; KH2K/AH0--or is it KH2K/KH0 as spotted by a couple of people?--was on this morning and worked several East Coast stations just before sunrise (1145-1200Z). I heard him work W4DR, K1ZM, W8LRL, N1EU as; /archives//html/Topband/2002-01/msg00054.html (7,122 bytes)
26. Topband: FT-1000MP Key Clicks (score: 1): Author: john.w1fv@telocity.com (John Kaufmann); Date: 17 Jan 2002 14:27:43 -0800; There's been lots of discussion recently (in a contesting.com poll, for example) about what it will take to get radio manufacturers to make better receivers. However, I think we are coming to realize; /archives//html/Topband/2002-01/msg00128.html (7,614 bytes)
27. Topband: FT-1000MP Key Clicks (score: 1): Author: john.w1fv@telocity.com (John Kaufmann); Date: 18 Jan 2002 10:08:44 -0800; I agree completely on this. I might also point that it was K1GQ and I who both worked together on the TS-940S phase noise problem. GQ performed his original phase noise measurements on my TS-940S and; /archives//html/Topband/2002-01/msg00139.html (8,074 bytes)
28. Topband: 5B4-USA LP 16/12/01 (score: 1): Author: john.w1fv@telocity.com (John Kaufmann); Date: 17 Dec 2001 09:19:34 -0800; This short path over or near the polar regions seems to be best during low sunspot years. In fact 1997 was the best year propagation-wise around the last sunspot trough, at least from my perspective.; /archives//html/Topband/2001-12/msg00063.html (7,711 bytes)
29. Topband: JT1 Polar Path (score: 1): Author: john.w1fv@telocity.com (John Kaufmann); Date: 20 Nov 2001 12:13:03 -0800; 73, John W1FV; /archives//html/Topband/2001-11/msg00072.html (7,434 bytes)
30. Topband: Internet access via power lines reborn in Europe (score: 1): Author: john.w1fv@telocity.com (John Kaufmann); Date: Mon, 03 Sep 2001 13:09:25 -0400; This European proposal seems to stand in contrast to the precedent set by high-speed DSL. As many of you know, DSL uses radio frequency signalling techniques over telephone lines. The bandwidths depe; /archives//html/Topband/2001-09/msg00010.html (8,359 bytes)
31. Topband: RE: skewed paths (score: 1): Author: john.w1fv@telocity.com (John Kaufmann); Date: 17 Sep 2001 15:15:07 -0700; There, in my view, scattering plays a major role, First let me say that I give Bob credit for trying to explain these phenomena in scientific terms. I come from an engineering background and can appr; /archives//html/Topband/2001-09/msg00089.html (8,998 bytes)
32. Topband: skew path (score: 1): Author: john.w1fv@telocity.com (John Kaufmann); Date: 27 Sep 2001 06:38:01 -0700; 73, John W1FV; /archives//html/Topband/2001-09/msg00149.html (8,169 bytes)
33. Topband: RE: skewed paths (score: 1): Author: john.w1fv@telocity.com (John Kaufmann); Date: Thu, 27 Sep 2001 21:36:45 -0400; Scattering at the ends of the path makes no sense at all, because if it was scattering there would have to be dumb luck at both ends of the path for headings to be skewed into the SAME area of the sk; /archives//html/Topband/2001-09/msg00153.html (9,658 bytes)
34. Topband: Zone 23 News (score: 1): Author: john.w1fv@telocity.com (John Kaufmann); Date: 17 Aug 2001 10:17:31 -0700; I calculate Boston sunset at around 2235Z (and sunrise at 1035Z) for the last week of September, so there is a very small amount of darkness overlap. Nonetheless, I agree that this is a very marginal; /archives//html/Topband/2001-08/msg00071.html (8,365 bytes)
35. Topband: 160M Short Verticals (score: 1): Author: john.w1fv@telocity.com (John Kaufmann); Date: 29 Aug 2001 15:04:31 -0700; TopBanders, Here's another solution for improving the efficiency of short verticals that doesn't seem to be widely known. Add a second (or even a third) identical short vertical in very close proximi; /archives//html/Topband/2001-08/msg00148.html (9,137 bytes)
36. Topband: 160M Short Verticals (score: 1): Author: john.w1fv@telocity.com (John Kaufmann); Date: 30 Aug 2001 09:08:51 -0700; Basically I agree: there is only improvement with the multiple in-phase verticals when the original ground system *is* smaller than optimum. That was implied in the original premise about losses star; /archives//html/Topband/2001-08/msg00150.html (8,693 bytes)
37. Topband: Feedlines (score: 1): Author: john.w1fv@telocity.com (John Kaufmann); Date: 26 Jul 2001 11:29:40 -0700; Let me describe a problem I encountered which I think is related to water migration. I feed my Beverages with RG-6. Over a period of time one of my Beverages started to exhibit extremely high noise l; /archives//html/Topband/2001-07/msg00057.html (8,835 bytes)
38. Topband: 160 vertical, radials and beverages (score: 1): Author: john.w1fv@telocity.com (John Kaufmann); Date: 7 May 2001 14:15:56 -0700; I think you will find that using the Beverages as elevated radials is not going to work well. One requirement of elevated radials is they should not produce much far field radiation. Otherwise the pa; /archives//html/Topband/2001-05/msg00013.html (7,867 bytes)
39. Topband: Vertical antenna near field efficiency (score: 1): Author: john.w1fv@telocity.com (John Kaufmann); Date: Thu, 19 Apr 2001 22:03:52 -0400; I haven't seen any data on angle-of-arrival statistics for 160 meters, although data (from propagation analysis programs) exists for higher frequencies. The trend certainly seems to show that higher; /archives//html/Topband/2001-04/msg00052.html (9,756 bytes)
40. Topband: 160 Antenna's Modeled (score: 1): Author: john.w1fv@telocity.com (John Kaufmann); Date: 20 Apr 2001 10:51:59 -0700; I wonder how much of this difference is due to angle-of-arrival and how much is polarization (horizontal vs. vertical)? It has been discussed on this reflector and elsewhere that propagation on 160 e; /archives//html/Topband/2001-04/msg00057.html (7,847 bytes)

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