Mail Archive Search: <+from:Ian White>

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References: [ +from:Ian: 217 ] [ White: 671 ]

Total 68 documents matching your query.

41. Re: [RFI] CAT 3 Cable? (score: 82): 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)
42. Re: [RFI] More RFI? (score: 82): 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)
43. Re: [RFI] toroids (score: 82): 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)
44. Re: [RFI] RadCom (RSGB) Article on BPL (score: 82): 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)
45. Re: [RFI] Earth isolation (score: 82): 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)
46. Re: [RFI] Earth isolation (score: 82): 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)
47. Re: [RFI] PME (Was: Earth isolation) (score: 82): 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)
48. Re: [RFI] Astron fan circuit noise (score: 82): 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)
49. Re: [RFI] Ferrite Beads (score: 82): 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)
50. Re: [RFI] Ethernet RFI (score: 82): 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)
51. Re: [RFI] Far Field, Near Field (score: 82): 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)
52. Re: [RFI] New to the Group (score: 82): 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)
53. Re: [RFI] New to the Group (score: 82): Author: Ian White G3SEK <G3SEK@ifwtech.co.uk>; Date: Sat, 26 Feb 2005 09:10:30 +0000; Neither did I, and I do hope Mac didn't see it that way. It's simply that surplus ferrite is a nightmare for the buyer. In this particular case, the seller is making no representation about the type; /archives//html/RFI/2005-02/msg00094.html (8,090 bytes)
54. Re: [RFI] Blocking RFID Signals? (score: 82): Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>; Date: Thu, 29 Dec 2005 07:34:30 +0000; You can bet that metal-lined wallets are coming off the production lines right now. -- 73 from Ian GM3SEK _______________________________________________ RFI mailing list RFI@contesting.com http://li; /archives//html/RFI/2005-12/msg00080.html (7,060 bytes)
55. Re: [RFI] grounding your ham equipment (score: 82): Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>; Date: Sun, 30 Jul 2006 13:35:59 +0100; Neither would I. Any advice to use that technique is impractical because it ignores the realities of station layout, and forgets what the in-shack 'grounding' is trying to achieve. We would like to k; /archives//html/RFI/2006-07/msg00019.html (11,025 bytes)
56. Re: [RFI] Help on speed drive motor controller RFI (score: 82): Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>; Date: Sun, 28 Jan 2007 23:38:53 +0000; Ask to see the documents for the declaration of "CE" conformance, which apply to every country in the European Union. On the face of it, it seems impossible that such a system could meet the regulati; /archives//html/RFI/2007-01/msg00024.html (7,409 bytes)
57. Re: [RFI] Help on speed drive motor controller RFI (score: 82): Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>; Date: Mon, 29 Jan 2007 08:54:01 +0000; Please read what was actually written, Tom. The original writer, EA5RS, wrote (emphasis added): "The drive has NO RFI FILTERS fitted." Taking him at his word, I replied that it seems impossible that; /archives//html/RFI/2007-01/msg00026.html (11,691 bytes)
58. Re: [RFI] DSL INTERFERENCE FROM 160 METERS (score: 82): Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>; Date: Wed, 7 Feb 2007 07:44:03 +0000; How much of your antenna current is returning to ground through the house wiring? It's a common problem on 160m. -- 73 from Ian GM3SEK 'In Practice' columnist for RadCom (RSGB) http://www.ifwtech.co.; /archives//html/RFI/2007-02/msg00012.html (7,971 bytes)
59. Re: [RFI] Weather Station on 433.92? (score: 82): Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>; Date: Thu, 12 Apr 2007 08:31:16 +0100; I was able to operate EME on 432MHz with an Oregon Scientific wireless thermometer transmitting on 433.92, less than 50ft away from the antenna. The remote sensor only transmits in bursts, but down; /archives//html/RFI/2007-04/msg00013.html (9,331 bytes)
60. Re: [RFI] TV RFI (score: 82): Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>; Date: Tue, 29 Jan 2008 07:54:47 +0000; * Where are those RF currents that are causing interference? * Which wires are they flowing on? * How much current is flowing? * How much difference does a choke make? A clamp-on RF current meter wil; /archives//html/RFI/2008-01/msg00071.html (10,367 bytes)

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