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21. Re: [RFI] Quiet Shack PC Systems? (score: 1): Author: "Ian White, G3SEK" <G3SEK@ifwtech.co.uk>; Date: Fri, 26 Mar 2004 12:02:10 +0000; Jim Brown wrote: On Thu, 18 Mar 2004 21:40:58 +0000, Ian White, G3SEK wrote: Then feed each side separately through its own *three-wire* mains filter that includes a ground choke. Hmmm. Are you putti; /archives//html/RFI/2004-03/msg00122.html (12,348 bytes)
22. Re: [RFI] Quiet Shack PC Systems? (score: 1): Author: "Ian White, G3SEK" <G3SEK@ifwtech.co.uk>; Date: Sat, 27 Mar 2004 16:32:21 +0000; Tom Rauch wrote: But from the lightning and RFI viewpoints, it is highly *un*desirable to cross-connect the mains and RF grounds at the shack. If you do, you are creating an alternative pathway for l; /archives//html/RFI/2004-03/msg00143.html (13,097 bytes)
23. Re: [RFI] Computer monitor RFI (score: 1): Author: "Ian White, G3SEK" <G3SEK@ifwtech.co.uk>; Date: Sat, 8 May 2004 09:29:09 +0100; Alan Beagley wrote: The Sony 15" monitor connected to the computer I am using with my rig generates an enormous amount of RFI: S9 signals at intervals on 20m and up, the intervals depending on the sc; /archives//html/RFI/2004-05/msg00091.html (9,479 bytes)
24. Re: [RFI] BPL Protest Opportunity? Give up? NO! (score: 1): Author: "Ian White, G3SEK" <G3SEK@ifwtech.co.uk>; Date: Mon, 10 May 2004 09:09:38 +0100; Richard (Rick) Karlquist (N6RK) wrote: Or they're say, go ahead and sue, and if you win, the monetary damages will be zero (or the proverbial one dollar), because ham radio is not a business, ham rad; /archives//html/RFI/2004-05/msg00105.html (9,501 bytes)
25. Re: [RFI] BPL Protest Opportunity? Give up? NO! (score: 1): Author: "Ian White, G3SEK" <G3SEK@ifwtech.co.uk>; Date: Mon, 10 May 2004 14:04:23 +0100; Alex wrote: "Ian White, G3SEK" wrote: It's still peanuts compared with the projected income from BPL, What is the projected income of BPL? Ask the people who are proposing it - "to infinity and beyon; /archives//html/RFI/2004-05/msg00107.html (9,513 bytes)
26. Re: [RFI] BPL Protest Opportunity? Give up? NO! (score: 1): Author: "Ian White, G3SEK" <G3SEK@ifwtech.co.uk>; Date: Fri, 21 May 2004 08:07:18 +0100; Hare,Ed, W1RFI wrote: For a rough estimate, *conservatively* assume 200,000 active amateurs. Conservatively, do they have, on average, $5,000 invested in the cost of their equipment, antennas, towers; /archives//html/RFI/2004-05/msg00140.html (10,418 bytes)
27. Re: [RFI] Complex Impedance Measurement Instruments (score: 1): Author: "Ian White, G3SEK" <G3SEK@ifwtech.co.uk>; Date: Thu, 3 Jun 2004 15:36:29 +0100; W0UN -- John Brosnahan wrote: You might check out http://www.qsl.net/n2pk/ and also look at the TAPR design that was teased at Dayton and will be published in the next issue of QEX. The N2PK vector n; /archives//html/RFI/2004-06/msg00002.html (7,798 bytes)
28. Re: [RFI] CAT 3 Cable? (score: 1): Author: "Ian White, G3SEK" <G3SEK@ifwtech.co.uk>; Date: Fri, 18 Jun 2004 08:20:14 +0100; Jim Brown wrote: On Thu, 17 Jun 2004 20:38:38 -0400, Tom Rauch wrote: As for beads, people just throw a few beads at the problem and assume they are making some profound change in the system. Actuall; /archives//html/RFI/2004-06/msg00058.html (9,091 bytes)
29. Re: [RFI] More RFI? (score: 1): Author: "Ian White, G3SEK" <G3SEK@ifwtech.co.uk>; Date: Mon, 12 Jul 2004 18:02:00 +0100; Mark - AA6DX wrote: From the UK ... giant RFI generator, to help the police stop the pursued vehicle .... Mark, AA6DX http://www.guardian.co.uk/crime/article/0,2763,1259138,00.html Actually, the idea; /archives//html/RFI/2004-07/msg00006.html (6,936 bytes)
30. Re: [RFI] toroids (score: 1): Author: "Ian White, G3SEK" <G3SEK@ifwtech.co.uk>; Date: Sun, 15 Aug 2004 10:13:10 +0100; Michael Tope wrote: Yes and no, Tom. You can wind a known number of turns on each toroid and then measure the inductance with an impedance analyzer like the MFJ-259B. From the physical dimensions of; /archives//html/RFI/2004-08/msg00018.html (10,531 bytes)
31. Re: [RFI] RadCom (RSGB) Article on BPL (score: 1): Author: "Ian White, G3SEK" <G3SEK@ifwtech.co.uk>; Date: Mon, 23 Aug 2004 16:00:13 +0100; Eric Rosenberg wrote: The August, 2004 issue of RadCom from the RSGB has an article, "The RSGB and Power Line Telecommunications (PLT), by Angus Annan, MM1CCR, "the RSGB Board member for the Environm; /archives//html/RFI/2004-08/msg00050.html (8,394 bytes)
32. Re: [RFI] Earth isolation (score: 1): Author: "Ian White, G3SEK" <G3SEK@ifwtech.co.uk>; Date: Wed, 8 Sep 2004 22:39:22 +0100; Jim Brown wrote: On Wed, 8 Sep 2004 19:29:12 +0100, George Shaw wrote: Has anyone any ideas or suggestions on preventing interference from the earth connection in the shack? Is there a way of isolati; /archives//html/RFI/2004-09/msg00045.html (9,911 bytes)
33. Re: [RFI] Earth isolation (score: 1): Author: "Ian White, G3SEK" <G3SEK@ifwtech.co.uk>; Date: Thu, 9 Sep 2004 08:07:12 +0100; Tom Rauch wrote: 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 a bucket of something we have to; /archives//html/RFI/2004-09/msg00051.html (9,393 bytes)
34. Re: [RFI] Earth isolation (score: 1): Author: "Ian White, G3SEK" <G3SEK@ifwtech.co.uk>; Date: Thu, 9 Sep 2004 08:23:02 +0100; Jim Brown wrote: On Wed, 8 Sep 2004 22:39:22 +0100, Ian White, G3SEK wrote: The cure was to place an RF block in the shack mains feed, using a three-wire filter which includes a ground-line choke. Wh; /archives//html/RFI/2004-09/msg00052.html (10,141 bytes)
35. Re: [RFI] PME (Was: Earth isolation) (score: 1): Author: "Ian White, G3SEK" <G3SEK@ifwtech.co.uk>; Date: Mon, 20 Sep 2004 10:12:23 +0100; George Shaw wrote: The original question was more to do with interference caused by a nearby Tx antenna used by another radio operator (not a ham) getting to my audio equipment which is connected to; /archives//html/RFI/2004-09/msg00089.html (10,687 bytes)
36. Re: [RFI] Astron fan circuit noise (score: 1): Author: "Ian White, G3SEK" <G3SEK@ifwtech.co.uk>; Date: Fri, 15 Oct 2004 08:38:42 +0100; John Rader wrote: My Astron SS-30M makes noise on 80m each time the fan starts. The noise starts out low in pitch and increases for about 10 seconds then stops. The fan continues to run for about 30; /archives//html/RFI/2004-10/msg00033.html (7,551 bytes)
37. Re: [RFI] Ferrite Beads (score: 1): Author: "Ian White, G3SEK" <G3SEK@ifwtech.co.uk>; Date: Thu, 21 Oct 2004 10:01:43 +0100; Jim Smith wrote: Sounds very ingenious and effective. The only problem is that I can't picture it. Can you give us a little more info? 73, Jim VE7FO Ford Peterson wrote: I use a machinist vice to do; /archives//html/RFI/2004-10/msg00076.html (9,640 bytes)
38. Re: [RFI] Ethernet RFI (score: 1): Author: "Ian White, G3SEK" <G3SEK@ifwtech.co.uk>; Date: Mon, 24 Jan 2005 09:55:52 +0000; Jim Brown wrote: If your eyes were good enough and you had a good magnifying glass, you could, indeed, check for wiring errors. The assumption that the wiring is satisfactory is NOT. There are, for e; /archives//html/RFI/2005-01/msg00069.html (9,329 bytes)
39. Re: [RFI] Far Field, Near Field (score: 1): Author: "Ian White, G3SEK" <G3SEK@ifwtech.co.uk>; Date: Tue, 25 Jan 2005 09:29:23 +0000; Cortland Richmond wrote: An article in the IEEE Antennas and Propagation Magazine for October 2004 discusses the near field/far field distinction for dipoles of various lengths up to one wavelength.; /archives//html/RFI/2005-01/msg00075.html (8,919 bytes)
40. Re: [RFI] New to the Group (score: 1): Author: Ian White G3SEK <G3SEK@ifwtech.co.uk>; Date: Fri, 25 Feb 2005 09:40:02 +0000; Worse still, they may be selling you some of each. ("They all look the same, so who cares?") Buying surplus ferrites is like buying resistors with no color bands... and even harder to tell. -- 73 fro; /archives//html/RFI/2005-02/msg00086.html (7,436 bytes)

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