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101. Re: [RFI] Amateur transceiver must accept interference? (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Fri, 23 Jul 2004 14:36:51 -0400; Icom that "must The 706 should also have a sticker that says other Hams should accept the QRM it produces. hi hi. But hey, you can't have everything in a case that small. They are still dandy mobile; /archives//html/RFI/2004-07/msg00177.html (7,411 bytes)
102. Re: [RFI] Ferrite Loops (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Sat, 14 Aug 2004 20:45:06 -0400; Rod, You really need to know what mix of bead you have. When I was tearing down W4AN's contest station, every bead I found (he used hundreds of them) had almost negligible effect on HF impedance. The; /archives//html/RFI/2004-08/msg00014.html (6,838 bytes)
103. Re: [RFI] toroids (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Sun, 15 Aug 2004 06:15:43 -0400; each analyzer And that's all you need to do. You don't need to know the manufacturer OR the mix, all you need to know is the impedance. 73 Tom _______________________________________________ RFI mai; /archives//html/RFI/2004-08/msg00019.html (7,559 bytes)
104. Re: [RFI] toroids (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Sun, 15 Aug 2004 06:20:12 -0400; You can, with something like a network analyzer, get the R and X values and look through manufacturer's data and get an idea what type core you may actually have, but that sometimes isn't totally ac; /archives//html/RFI/2004-08/msg00020.html (7,224 bytes)
105. Re: [RFI] Ferrite Loops (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Mon, 16 Aug 2004 09:55:47 -0400; I received several identical e-mails about using a 259 to check cores. Rather than type identical responses or do a bunch of cutting and pasting in my unfriendly mail software, what I do here is: I m; /archives//html/RFI/2004-08/msg00026.html (8,927 bytes)
106. Re: [RFI] Ferrite Loops (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Mon, 16 Aug 2004 14:41:26 -0400; If they are wiped out on all channels (most likely), it's overload - buy them a RadioShack filter. These are cheap - get a bunch. Don't try to convince them their TVs and VCRs are junk (even though i; /archives//html/RFI/2004-08/msg00029.html (9,278 bytes)
107. Re: [RFI] New truck (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Mon, 16 Aug 2004 17:15:09 -0400; that Ford trucks experience. Hi Jim, My old F250HD PSD 1995 model was a nightmare. I never did get it cured 100%. My new 2003 F250 HD PSD was very easy to fix. I have virtually no noise at all from; /archives//html/RFI/2004-08/msg00031.html (7,689 bytes)
108. Re: [RFI] New truck (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Mon, 16 Aug 2004 18:47:02 -0400; Ford RFI issues. None of my newer Lincoln/ Ford cars or trucks have fuel pump noise. That all seemed to stop around 1990 or so, at least for the models I've bought (one about every 2-3 years). I won; /archives//html/RFI/2004-08/msg00033.html (7,502 bytes)
109. Re: [RFI] Recent Posting on RFI with intercom. (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Mon, 23 Aug 2004 15:01:11 -0400; Solution seems to have been found. My RF is getting into the intercom via a connected FM antenna. With it disconnected 95% of the RFI goes away. I plan to use a high pass filter and hope this will al; /archives//html/RFI/2004-08/msg00056.html (7,934 bytes)
110. Re: [RFI] Recent Posting on RFI with intercom. (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Mon, 23 Aug 2004 15:34:38 -0400; with RF that isn't Rauch noted, the RF. You've got Jim had some good suggestions, and let me add one more thing. When I had to RF proof systems in or near high power BC stations, without fail high p; /archives//html/RFI/2004-08/msg00058.html (7,922 bytes)
111. Re: [RFI] Documenting Power Line Noise (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Wed, 25 Aug 2004 22:22:16 -0400; The lineman called me on the phone today to indicate that the line will be powered on Friday, but it is also scheduled to be brought down again on Monday. I would like to capture these moments to pro; /archives//html/RFI/2004-08/msg00072.html (10,573 bytes)
112. Re: [RFI] From Communications Daily re: BPL (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Wed, 1 Sep 2004 10:15:13 -0400; Another important thing is that most technical people understand when it becomes personal, that means the guy making it personal has no technical options left. He has to paint the other guy as perso; /archives//html/RFI/2004-09/msg00003.html (7,646 bytes)
113. Re: [RFI] From Communications Daily re: BPL (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Wed, 1 Sep 2004 14:21:26 -0400; <<President Bush has already publicly stated the need to make such changes. The administration's position is predicated on the belief that BPL is a great way to quickly get everyone a high speed conn; /archives//html/RFI/2004-09/msg00010.html (9,386 bytes)
114. Re: [RFI] Earth isolation (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Wed, 8 Sep 2004 18:20:58 -0400; accidental *to*. Whatever to enlist as a Hi Ian, I think I know what you meant, but I'm not sure I agree with that picture. RF that is accidentally picked up doesn't need to flow anywhere. It isn't; /archives//html/RFI/2004-09/msg00046.html (10,482 bytes)
115. Re: [RFI] Earth isolation (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Wed, 8 Sep 2004 18:26:02 -0400; interference from the the earth back up the George, Do the right thing and correct whatever is causing the common mode current to appear on the ground. The ground MUST have a low common mode impedan; /archives//html/RFI/2004-09/msg00047.html (7,683 bytes)
116. Re: [RFI] Earth isolation (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Thu, 9 Sep 2004 09:27:50 -0400; applies must have in. The system is not a constant current source and a constant impedance system that provides a fixed amount of current that has to flow somewhere else. The system is full of unint; /archives//html/RFI/2004-09/msg00055.html (10,925 bytes)
117. Re: [RFI] Earth isolation (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Thu, 9 Sep 2004 10:03:52 -0400; is, for example, lead routes around components to the chassis as the center box'? Jim handled that all well Dennis, but let me add a few things. Most of the RF-in-shack problems come from Marconi an; /archives//html/RFI/2004-09/msg00057.html (10,127 bytes)
118. Re: [RFI] Utility Automation (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Tue, 14 Sep 2004 08:49:21 -0400; you're using, to be more they'll need more answer is a faster and is Ed, When I look at BPL, something bothers me. In order to duplex, they either have to store data and time-share directions or spl; /archives//html/RFI/2004-09/msg00077.html (9,008 bytes)
119. Re: [RFI] MFJ-854 Clip-on RF Ammeter Experience? (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Thu, 23 Sep 2004 13:18:27 -0400; Dan, I don't know the model numbers, but I worked on or two one of the current meters they sell. The style I did were reasonably close in accuracy and had a useful current range from a few mA to some; /archives//html/RFI/2004-09/msg00100.html (8,065 bytes)
120. Re: [RFI] 160 Meter Interference (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Tue, 5 Oct 2004 20:21:12 -0400; That's a switching power supply of some type. You can be sure it isn't the power companies fault or the telco company. It is remotely possible (but very unlikely) to be a CATV supply. They are almost; /archives//html/RFI/2004-10/msg00008.html (7,736 bytes)

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