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161. Re: [RFI] Are All Low-Pass Filters Alike? (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Tue, 16 Aug 2005 11:17:45 -0400; What kind (brand and model) of amplifier Doc? That is very important. solid antenna. _______________________________________________ RFI mailing list RFI@contesting.com http://lists.contesting.com/ma; /archives//html/RFI/2005-08/msg00031.html (7,329 bytes)
162. Re: [RFI] Are All Low-Pass Filters Alike? (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Tue, 16 Aug 2005 19:10:14 -0400; transformers Hi Doc, Those amps are "designed" to be nothing but cheap CB amplifiers. They have very poor linearity. Part of the non-linearity issue is caused by the very poor biasing system they us; /archives//html/RFI/2005-08/msg00044.html (8,539 bytes)
163. Re: [RFI] BPL Propaganda, ARRL Rebuttal on NPR's Morning Edition (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Thu, 18 Aug 2005 11:01:22 -0400; Telling them they did a "bad job" is meaningless. Hams are also significantly less important to the rest of the world when compared to granny accessing pictures. If the general public had a choice in; /archives//html/RFI/2005-08/msg00058.html (10,842 bytes)
164. Re: [RFI] BPL Propaganda, ARRL Rebuttal on NPR's Morning Edition (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Thu, 18 Aug 2005 15:52:29 -0400; Probably the very best strategy would be to do a cost analysis of BPL compared to wireless. What about reliability? BPL gear would be knocked down every time a lightning bolt flashes. I know my ISDN; /archives//html/RFI/2005-08/msg00067.html (9,445 bytes)
165. Re: [RFI] BPL Propaganda, ARRL Rebuttal on NPR's Morning Edition (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Thu, 18 Aug 2005 21:22:34 -0400; No I did not read it too quickly. I also don't take a few words and take them out of context.>> It was pretty well in front of anyone who was following BPL and the early FCC actions that the Bush adm; /archives//html/RFI/2005-08/msg00078.html (9,064 bytes)
166. [RFI] Flourescent lamp RFI (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Tue, 27 Sep 2005 21:01:58 -0400; flourescent LIGHT (BULB) It is the ballast. Flourescent lamps generate a tiny amount of broad spectrum RF energy from non-linearity in the plasma, but it is very small. Newer electronic ballasts are; /archives//html/RFI/2005-09/msg00062.html (7,562 bytes)
167. Re: [RFI] Electric company problem (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Sat, 10 Dec 2005 13:04:47 -0500; Did you try a noise canceller device?? The best one on the market is the MFJ 1025 series, although in the near future a significantly better one might be sold by a different source. hardware in 9 alt; /archives//html/RFI/2005-12/msg00023.html (9,272 bytes)
168. Re: [RFI] Electric company problem (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Sat, 10 Dec 2005 20:04:27 -0500; hitting wooden shooting tool? As a consultant to utility companies in NW Ohio and SE Michigan, I hit hundreds and hundreds of poles with hammers. So did anyone else looking for problems. It was SOP,; /archives//html/RFI/2005-12/msg00035.html (9,468 bytes)
169. Re: [RFI] FW: [HDXA-NI0DX] MFJ-1026 (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Sat, 10 Dec 2005 20:26:38 -0500; I generally use them for signal enhancement or rejection. They can also be used for noise elimination >>IF<< the noise is coming from a point source. If noise is emanating from a power line or other; /archives//html/RFI/2005-12/msg00037.html (8,047 bytes)
170. Re: [RFI] Electric company problem (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Sat, 10 Dec 2005 20:51:01 -0500; problem. The level don't change in I'm not disagreeing that he might have multiple sources, but..... I've seen many single sources that changed in level from zero to very strong. There aren't gain l; /archives//html/RFI/2005-12/msg00039.html (10,563 bytes)
171. Re: [RFI] Electric company problem (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Sun, 11 Dec 2005 08:24:06 -0500; of the sense on the main degrees enough). :) That's right. That's better wording. I meant 180 with respect to noise on the other port, not 180 against itself on one port. ___________________________; /archives//html/RFI/2005-12/msg00043.html (9,123 bytes)
172. Re: [RFI] Electric company problem (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Sun, 11 Dec 2005 13:15:37 -0500; Hi Ed, Doesn't matter. My point was only that it isn't accurate to say a noise canceller does not work on multiple sources or exclude any particular noise source like a power line. A single source, e; /archives//html/RFI/2005-12/msg00048.html (10,347 bytes)
173. Re: [RFI] BPL news today's WSJ (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Tue, 20 Dec 2005 15:02:29 -0500; mention, so may Low-band. You mean like the Red Cross uses nation wide, or like Georgia (GEMA) uses for long range state wide communication back to emergency centers? Hey, who cares about them. ____; /archives//html/RFI/2005-12/msg00058.html (7,800 bytes)
174. Re: [RFI] BPL redux (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Wed, 21 Dec 2005 10:45:09 -0500; Mismanagent of, and ignorance of, the state of an You should see how FirstEnergy maintains lines around Cleveland OH. It is too sad to be funny. I saw primaries laying on wooden cross arms, a neutral; /archives//html/RFI/2005-12/msg00067.html (8,188 bytes)
175. Re: [RFI] lighting rfi (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Mon, 2 Jan 2006 08:01:06 -0500; The first thing I'd do is tell him you don't want to alarm him, but you are a little concerned. When a device is making noise that sometimes means it is sparking someplace inside. It could be a bad b; /archives//html/RFI/2006-01/msg00010.html (9,326 bytes)
176. Re: [RFI] Mobile amps and vehicle issues (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Wed, 11 Jan 2006 18:40:04 -0500; option or even had good modifications would be My Ford truck was easy to fix. The main problem was the cab floated on rubber mounts. When it was floating I had ingress into the electrical system and; /archives//html/RFI/2006-01/msg00052.html (8,032 bytes)
177. Re: [RFI] Mobile amps and vehicle issues (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Thu, 12 Jan 2006 14:05:21 -0500; installation of a simple That's not the best advice when I think about it. I can ty-wrap two cheap pieces of Radio Shack coax together tightly for 30 feet, and I can't measure the crosstalk on a 80-; /archives//html/RFI/2006-01/msg00061.html (9,211 bytes)
178. Re: [RFI] Mobile amps and vehicle issues (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Thu, 12 Jan 2006 16:28:20 -0500; Are any particular a quarter wave mag Hi Howard, That's actually the kind of thing that causes problems with current on coax shields! You have a poor antenna ground. A requirement of any unbalanced; /archives//html/RFI/2006-01/msg00065.html (9,979 bytes)
179. Re: [RFI] RFI Direction Finding (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Fri, 17 Feb 2006 21:13:06 -0500; directivity on centered near 7 MHz but the gain will be low establish good or mobile mounted? I have a Sprague battery operated portable system with LF loops and VHF/UHF yagi antenna for tracking po; /archives//html/RFI/2006-02/msg00007.html (7,996 bytes)
180. Re: [RFI] RFI Canceling RFI? (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Thu, 9 Mar 2006 20:44:00 -0500; It's very easy obvious what happened when we work through this. 1.) Only one light makes noise, he stated that. 2.) The second lamp that does not make noise, when placed across the power mains, redu; /archives//html/RFI/2006-03/msg00032.html (8,430 bytes)

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