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1. Re: Topband: 160m inverted vee (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Thu, 21 Aug 2003 09:00:11 -0400; I would give the low dipole a try. At least it would get you on the air. People do work a lot of stuff with low dipoles. I've *rarely* observed cases where a low dipole (below 150 feet) is competiti; /archives//html/Topband/2003-08/msg00109.html (8,488 bytes)
2. Topband: Phased 2-wire Beverage antennas (score: 1): Author: w8ji@contesting.com (Tom Rauch); Date: Thu, 02 Jan 2003 07:41:39 -0500; are Yes, it makes a difference! That would put one of the antenna out-ofphase! You must have the phase identical in the back-fire mode. Also, each antenna must have similar or ideally the same phase; /archives//html/Topband/2003-01/msg00015.html (7,347 bytes)
3. Topband: BCK (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Thu, 09 Jan 2003 06:17:14 -0500; We might need to all try to do something to get this beacon fixed. It has to be bothering people in the north, because it is S4-6 down here at times. This morning it was wiping out 8N1OGA. BCK BLACK; /archives//html/Topband/2003-01/msg00046.html (6,410 bytes)
4. Topband: Common mode noise on power lines? (score: 1): Author: w8ji@contesting.com (Tom Rauch); Date: Fri, 10 Jan 2003 09:17:42 -0500; That could be done if the power grid system was designed that way, but lightning would be a big problem with transfomers!!! Better to not even think about that one Charlie! 73 Tom; /archives//html/Topband/2003-01/msg00051.html (7,031 bytes)
5. Topband: Line noise filters for Topband (score: 1): Author: Tom Rauch" <w8ji@contesting.com (Tom Rauch); Date: Sat, 11 Jan 2003 14:01:27 -0500; I'm not sure that would do all that much. The filter generally needs to be located near the noise source. For example, I had a computer over 1 mile away bothering me...it was exciting the power line; /archives//html/Topband/2003-01/msg00061.html (8,441 bytes)
6. Topband: Shack wiring & noise (score: 1): Author: Tom Rauch" <w8ji@contesting.com (Tom Rauch); Date: Sun, 12 Jan 2003 11:54:51 -0500; seconds Very large electric motors have a starting capacitor that switches in only when the motor is at rest, and is initially activated. Most furnace and air conditioning motors have a "run" capaci; /archives//html/Topband/2003-01/msg00065.html (8,944 bytes)
7. Topband: BCB Trap Filter (score: 1): Author: Tom Rauch" <w8ji@contesting.com (Tom Rauch); Date: Tue, 14 Jan 2003 07:48:48 -0500; It is difficult to obtain high rejection at 1.5 MHz and have low loss and reasonable ripple above 1.8MHz. Most filter attenuation or ripple won't measure nearly as good as "calculated" through table; /archives//html/Topband/2003-01/msg00076.html (8,078 bytes)
8. Topband: re shack wiring/furnace (score: 1): Author: Tom Rauch" <w8ji@contesting.com (Tom Rauch); Date: Tue, 14 Jan 2003 07:50:27 -0500; may come from the igniter . Ford actually said the noise stops when the furnace starts! That changes everything. 73 Tom; /archives//html/Topband/2003-01/msg00077.html (6,949 bytes)
9. Topband: FYI (score: 1): Author: Tom Rauch" <w8ji@contesting.com (Tom Rauch); Date: Thu, 16 Jan 2003 18:44:44 -0500; (non-skewed Skewed paths for any *long distance* path certainly are somewhat common. For example VK3ZL is slightly south of due west for me, nowhere near a polar path, and his signal waddles around; /archives//html/Topband/2003-01/msg00099.html (8,264 bytes)
10. Topband: Topband Skewed Propagation (score: 1): Author: Tom Rauch" <w8ji@contesting.com (Tom Rauch); Date: Fri, 17 Jan 2003 10:05:40 -0500; possibly seek. The force on charges we call radiation just goes where the re-radiation from charges allows it to go. Someone else had an excellent clear post here a few weeks ago about re-radiation; /archives//html/Topband/2003-01/msg00107.html (8,368 bytes)
11. Topband: Skew (score: 1): Author: Tom Rauch" <w8ji@contesting.com (Tom Rauch); Date: Fri, 17 Jan 2003 12:28:19 -0500; What was that? other That really is normal. There are even times off-sunrise when signals scatter in from multiple directions and angles. Short-lasting peaks when the path is a tough one or marginal; /archives//html/Topband/2003-01/msg00115.html (8,239 bytes)
12. Topband: Skew (score: 1): Author: Tom Rauch" <w8ji@contesting.com (Tom Rauch); Date: Fri, 17 Jan 2003 12:40:04 -0500; Maybe it is Greg, that's of course a good question or reasonable thought. But the skew is clearly there with arrays having very little high angle response and very sharp patterns! If you listen to s; /archives//html/Topband/2003-01/msg00116.html (8,184 bytes)
13. Topband: Is There A Post Sunrise Peak? (score: 1): Author: Tom Rauch" <w8ji@contesting.com (Tom Rauch); Date: Fri, 17 Jan 2003 19:33:38 -0500; Noise level very clearly does drop from directions of daylight and even from directions of poor propagation. The more directional the antenna system, the less noticeable any noise change when pointe; /archives//html/Topband/2003-01/msg00131.html (9,361 bytes)
14. Topband: Is There A Post Sunrise Peak? (score: 1): Author: Tom Rauch" <w8ji@contesting.com (Tom Rauch); Date: Fri, 17 Jan 2003 21:21:19 -0500; No. At or near sunrise there is often, but not always, a level increase. There is also a slight noise decrease with directional antennas at the sunrise end of the path, the noise decrease being larg; /archives//html/Topband/2003-01/msg00133.html (9,306 bytes)
15. Topband: Is There A Post Sunrise Peak? (score: 1): Author: Tom Rauch" <w8ji@contesting.com (Tom Rauch); Date: Sun, 19 Jan 2003 02:57:33 -0500; What I see is similar. At times when there is a mag storm, everything works like it does some days (nowhere near ALL days) at sunrise when there is scattering and severe multipath. While the AGC of; /archives//html/Topband/2003-01/msg00144.html (10,612 bytes)
16. Topband: A few words (score: 1): Author: Tom Rauch" <w8ji@contesting.com (Tom Rauch); Date: Sun, 19 Jan 2003 10:35:02 -0500; RE: backscatter backscatter Sorry to drag this out but the "signals of" VK3ZL and others on paths far from poles skew and move, all with a path nowhere near the auroral zones. It is an almost daily o; /archives//html/Topband/2003-01/msg00149.html (8,839 bytes)
17. Topband: Re: Observatiions on Skew Paths from Minnesota (score: 1): Author: Tom Rauch" <w8ji@contesting.com (Tom Rauch); Date: Sun, 19 Jan 2003 10:43:56 -0500; path skewing as a "rare event" while those of us up here >consider a = "true path" to be a rare event !=20 I live in middle GA, and skewing is a commonly observed event on longer = distance signals.; /archives//html/Topband/2003-01/msg00150.html (7,166 bytes)
18. Topband: EY8MM (score: 1): Author: Tom Rauch" <w8ji@contesting.com (Tom Rauch); Date: Mon, 20 Jan 2003 08:04:37 -0500; Nodir forwarded this list so we can avoid duping him, hi hi. Here is the list of NA stations: January 17, 2003 160 M W4DR W4MYA AA1K W4ZV N4CFL W4PK W8JI W4ML K4ZW K4CIA VE1ZZ; /archives//html/Topband/2003-01/msg00156.html (6,408 bytes)
19. Topband: Detuning towers (score: 1): Author: Tom Rauch" <w8ji@contesting.com (Tom Rauch); Date: Mon, 20 Jan 2003 10:44:09 -0500; After another long conversation about this last night, I thought I'd add a quick page on the topic of detuning towers. http://www.w8ji.com/detuning_towers.htm 73 Tom; /archives//html/Topband/2003-01/msg00160.html (6,660 bytes)
20. Topband: FT1000 MK V (score: 1): Author: Tom Rauch" <w8ji@contesting.com (Tom Rauch); Date: Mon, 20 Jan 2003 14:28:17 -0500; Someone might forward this to an MP reflector if there is one for the MK V. I'm playing with a new MK V, and just finishing a page on mods. It has not only the same nasty keyclicks of a stock MP, it; /archives//html/Topband/2003-01/msg00164.html (7,071 bytes)

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