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41. Re: [RFI] My power line noise problems, revisited (score: 1): Author: "Jim Brown" <jimbrown.enteract@rcn.com>; Date: Sat, 07 Feb 2004 14:26:06 -0600; MOV's are, indeed, a potential cause of RFI. Here's how. When it's working properly, an MOV (metal oxide varistor) has the charactistic of conducting above some threshold voltage but being an open ci; /archives//html/RFI/2004-02/msg00048.html (9,584 bytes)
42. Re: [RFI] Help with broadcast interference (score: 1): Author: "Jim Brown" <jimbrown.enteract@rcn.com>; Date: Fri, 13 Feb 2004 00:34:52 -0600; Yes, these are some pretty high field strengths. Are you sure they are correctly measured? I suspect they are not. Perhaps your antenna is influencing the measurement. Exactly how far are you from th; /archives//html/RFI/2004-02/msg00078.html (9,617 bytes)
43. [RFI] FCC okays BPL proposal (score: 1): Author: "Jim Brown" <jimbrown.enteract@rcn.com>; Date: Fri, 13 Feb 2004 09:36:03 -0600; As a city resident and ong time believer that one should be a good neighbor, and as a ham who believes that much of the fun of operating lies in doing it with lower power, I've never run more than 10; /archives//html/RFI/2004-02/msg00080.html (7,414 bytes)
44. [RFI] Your Bandpass Filters (score: 1): Author: "Jim Brown" <jimbrown.enteract@rcn.com>; Date: Mon, 16 Feb 2004 10:20:44 -0600; Someone pointed me to your webpage for bandpass filters for the ham bands. It looks like some of your products might be useful to me, but there aren't enough specs for me to know. 1. What is the powe; /archives//html/RFI/2004-02/msg00103.html (7,894 bytes)
45. Re: [RFI] another problem solved. (score: 1): Author: "Jim Brown" <jimbrown.enteract@rcn.com>; Date: Tue, 24 Feb 2004 07:29:42 -0600; If he's talking about the GE Super Radio, your story is interesting for another reason. I own several of these radios. While this is an excellent receiver, it is VERY susceptible to noise on the powe; /archives//html/RFI/2004-02/msg00134.html (6,996 bytes)
46. Re: [RFI] TVI on home cinema audio (score: 1): Author: "Jim Brown" <jimbrown.enteract@rcn.com>; Date: Sun, 29 Feb 2004 09:26:54 -0600; Where have ferrites been tried, what specific types, and how have they been used? The basic function of a ferrite in RFI suppression is to turn the cable that you use it on into a choke. At higher fr; /archives//html/RFI/2004-02/msg00150.html (11,289 bytes)
47. Re: [RFI] RFI and Ford Vehicles (score: 1): Author: "Jim Brown" <jimbrown.enteract@rcn.com>; Date: Thu, 25 Mar 2004 22:47:18 -0600; I use my FT100D in my '99 Volvo S80 on 40 through 10 meters at 100 watts. The battery is in the trunk, and I'm powered directly from the battery. The antenna is a Ham Stick on a license plate mount.; /archives//html/RFI/2004-03/msg00118.html (8,584 bytes)
48. Re: [RFI] Quiet Shack PC Systems? (score: 1): Author: "Jim Brown" <jimbrown.enteract@rcn.com>; Date: Thu, 25 Mar 2004 23:00:35 -0600; One footnote to your excellent advice, Dale. If I'm not mistaken, CE compliance is written around the EN55103-1 and -2. The emissions standard is mandatory, however the susceptibility standard is ess; /archives//html/RFI/2004-03/msg00119.html (9,910 bytes)
49. Re: [RFI] Quiet Shack PC Systems? (score: 1): Author: "Jim Brown" <jimbrown.enteract@rcn.com>; Date: Thu, 25 Mar 2004 23:24:11 -0600; Hmmm. Are you putting a choke on the ground lead? Doesn't that prevent the protection it SHOULD provide for HF transients like lightning and power line misbehavior? I can't imagine that being blessed; /archives//html/RFI/2004-03/msg00120.html (9,300 bytes)
50. Re: [RFI] Today's Wall Stree Journal front page article on hams & BPL (score: 1): Author: "Jim Brown" <jimbrown.enteract@rcn.com>; Date: Fri, 26 Mar 2004 16:23:20 -0600; Yes, I think that contesting skills, especially "old school" contesting, can do a lot to build good the skills needed for operation in emergencies. So does running nets and handling traffic (remember; /archives//html/RFI/2004-03/msg00124.html (9,803 bytes)
51. Re: [RFI] BPL (score: 1): Author: "Jim Brown" <jimbrown.enteract@rcn.com>; Date: Sat, 27 Mar 2004 13:55:25 -0600; Exactly. The comments I filed in June or July emphasized the disruption to ALL HF services. Ham radio was simply one of those I mentioned. Jim Brown K9YC _____________________________________________; /archives//html/RFI/2004-03/msg00149.html (8,130 bytes)
52. Re: [RFI] WSJ-BPL (score: 1): Author: "Jim Brown" <jimbrown.enteract@rcn.com>; Date: Wed, 31 Mar 2004 08:52:25 -0600; This is a a common problem with the popular press. Their people are competent ONLY as "writers" and as reporters of events that their education has made them competent to understand. Few, if any, are; /archives//html/RFI/2004-03/msg00183.html (8,843 bytes)
53. Re: [RFI] WSJ-BPL (score: 1): Author: "Jim Brown" <jimbrown.enteract@rcn.com>; Date: Wed, 31 Mar 2004 21:54:54 -0600; You know the wrong engineers for this sort of assignment. (or maybe the limitation is in your head). I'm one of the "right" kind. I'm an engineer, and I make my living by communicating technical conc; /archives//html/RFI/2004-03/msg00185.html (9,851 bytes)
54. Re: [RFI] WSJ-BPL (score: 1): Author: "Jim Brown" <jimbrown.enteract@rcn.com>; Date: Thu, 01 Apr 2004 22:51:09 -0600; No insult taken or intended, Mike. But I have seen far too many companies who pigeonhole their engineers into the narrow boxes you describe. When they do, they hurt their companies by preventing comm; /archives//html/RFI/2004-04/msg00002.html (7,274 bytes)
55. [TowerTalk] Re: W4AN Silent Key (score: 1): Author: "Jim Brown" <jim@audiosystemsgroup.com>; Date: Mon, 05 Apr 2004 11:53:02 -0600; Because I was inactive on HF for most of the last 18 years, I didn't get to know Bill, and worked him only a few times since my return in a contests. But because Bill was such an active supporter of; /archives//html/RFI/2004-04/msg00019.html (8,000 bytes)
56. [RFI] W4AN (score: 1): Author: "Jim Brown" <jimbrown.enteract@rcn.com>; Date: Mon, 05 Apr 2004 15:54:56 -0600; Because I was inactive on HF for most of the last 18 years, I didn't get to know Bill, and worked him only a few times since my return in a few contests. But because Bill was such an active supporter; /archives//html/RFI/2004-04/msg00022.html (7,079 bytes)
57. Re: [RFI] BPL a major topic at Upcoming UTC Annual Meeting (score: 1): Author: "Jim Brown" <jimbrown.enteract@rcn.com>; Date: Fri, 16 Apr 2004 16:18:56 -0500; Sounds like a plan. Perhaps our contest should include multipliers for portable and mobile rigs operating in the test areas. And the multiplier ought to offer MORE points for higher power. After 48 y; /archives//html/RFI/2004-04/msg00046.html (7,601 bytes)
58. RE: [RFI] BPL (score: 1): Author: "Jim Brown" <jimbrown.enteract@rcn.com>; Date: Sat, 17 Apr 2004 14:05:01 -0500; Some questions: 1. How many licensed hams are there within all of the BPL test sites? Have they been carefully selected to minimize the likelihood of interference occuring? 2. How many of them are ac; /archives//html/RFI/2004-04/msg00068.html (9,221 bytes)
59. RE: [RFI] More Thoughts on BPL (score: 1): Author: "Jim Brown" <jimbrown.enteract@rcn.com>; Date: Mon, 24 May 2004 08:22:12 -0500; There was an excellent (and frightening) piece on the NPR program "This American Life" this week that addressed the appointments of members to a science advisory panel on lead poisoning. I didn hear; /archives//html/RFI/2004-05/msg00157.html (9,111 bytes)
60. Re: [RFI] Ethernet, radio astronomy, and electric fences (score: 1): Author: "Jim Brown" <jimbrown.enteract@rcn.com>; Date: Fri, 28 May 2004 12:17:09 -0500; Is a significant component of the Ethernet stuff common mode? If so, it seems that common mode chokes should help, especially with MF and HF. These pictures strongly suggest that Ethernet may be a bi; /archives//html/RFI/2004-05/msg00186.html (7,648 bytes)

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