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101. Re: [RFI] Cree LED Bulbs? (score: 1): Author: Dale <svetanoff@earthlink.net>; Date: Tue, 12 Mar 2013 11:16:16 -0500 (GMT-05:00); Kurt, This does amount to a serious scenario. If there is a switcher inside each lamphead (Mike says he has sent as unit to a friend for analysis), then there are 2 possible cures, neither of which i; /archives//html/RFI/2013-03/msg00065.html (9,691 bytes)
102. [RFI] "Fake" power supplies (score: 1): Author: Dale <svetanoff@earthlink.net>; Date: Thu, 14 Mar 2013 16:41:20 -0500 (GMT-05:00); All, In view of the continuing multiple threads regarding RFI to radio systems from various products and their power supplies, here is an article that I think sheds some light on the severity of the; /archives//html/RFI/2013-03/msg00071.html (8,782 bytes)
103. Re: [RFI] "Fake" power supplies (score: 1): Author: Dale <svetanoff@earthlink.net>; Date: Fri, 15 Mar 2013 00:30:18 -0500 (GMT-05:00); Roger, The issue is not whether these devices are "fake" power supplies or fake chargers - irrelevant. If they have fake components and maybe faked UL and FCC labels, then they are fakes as far as be; /archives//html/RFI/2013-03/msg00074.html (12,297 bytes)
104. Re: [RFI] Under-counter lighting that is quiet? (score: 1): Author: Dale <svetanoff@earthlink.net>; Date: Sun, 24 Mar 2013 14:47:25 -0500 (GMT-05:00); Peter, Beware of flourescent tube fixtures, too. Today, nearly all ballasts are switchers. The can be just as bad as the LED drivers. Make certain that you can return any light fixtures that create t; /archives//html/RFI/2013-03/msg00116.html (9,427 bytes)
105. Re: [RFI] Printed Circuit Board Design for Real-World EMI Control (Electromagnetic Compatibility is NOT Magic!) (score: 1): Author: Dale <svetanoff@earthlink.net>; Date: Sat, 30 Mar 2013 22:54:36 -0500 (GMT-05:00); David and All, Yes, Bruce Archambeault is a long-time EMC practitioner. He has worked at IBM's operation in Research Triangle Park, NC, for quite awhile now. He's very active and well-known within th; /archives//html/RFI/2013-03/msg00147.html (9,458 bytes)
106. Re: [RFI] TVI Question (score: 1): Author: Dale <svetanoff@earthlink.net>; Date: Wed, 24 Apr 2013 10:03:42 -0500 (GMT-05:00); This situation does sound like strong RF is getting into the audio amp stage of the TV. (Yes, the transistors in the audio output amp that drives the speakers are very nice detector diodes. Since the; /archives//html/RFI/2013-04/msg00026.html (9,785 bytes)
107. Re: [RFI] buying a AC adapter (score: 1): Author: Dale <svetanoff@earthlink.net>; Date: Mon, 29 Apr 2013 17:01:20 -0500 (GMT-05:00); Aaron, Get yourself a linear power supply. The linear that tore up your SW listening may very well have had a self-oscillation problem in the series regulator chip. (The popular 78-series regulators; /archives//html/RFI/2013-04/msg00087.html (9,493 bytes)
108. [RFI] Linear wall wart - heap cheap (score: 1): Author: Dale <svetanoff@earthlink.net>; Date: Mon, 6 May 2013 23:59:38 -0500 (GMT-05:00); Listmates, After seeing many posts along the way for people wanting/needing RF quiet wall wart supplies, here is something that might help. Follow this link: http://www.mpja.com/05-07-13.asp?r=166888; /archives//html/RFI/2013-05/msg00000.html (8,515 bytes)
109. Re: [RFI] Comments on RFI from Ductless Air Conditioning Units? (score: 1): Author: Dale <svetanoff@earthlink.net>; Date: Thu, 9 May 2013 14:27:35 -0400 (EDT); Jeff, The church I attend had 8 of these type of units installed 3 or 4 years ago. (The building dates from 1904, so ductless was the only practical route. Yes, our units resemble the Daiken ones to; /archives//html/RFI/2013-05/msg00008.html (11,368 bytes)
110. Re: [RFI] Fw: RF tight rooms - somewhat OT (score: 1): Author: Dale <svetanoff@earthlink.net>; Date: Sun, 12 May 2013 16:21:59 -0400 (EDT); Gary and All: I feel compelled to comment at this point because I had more than 13 years of engineering experience in the RF shielding industry. (I was employed by Lindgren RF Enclosures, Inc., based; /archives//html/RFI/2013-05/msg00027.html (14,659 bytes)
111. Re: [RFI] RF tight rooms - somewhat OT (score: 1): Author: Dale <svetanoff@earthlink.net>; Date: Sun, 12 May 2013 15:37:11 -0500 (GMT-05:00); Roger, A darned good chance that the room you were in was made by Lindgren RF Enclosures, and probably was one of their DEI rooms. "DEI" = "Double Electrically Isolated", meaning that the inner and o; /archives//html/RFI/2013-05/msg00030.html (12,207 bytes)
112. Re: [RFI] Comments on RFI from Ductless Air Conditioning Units? (score: 1): Author: Dale <svetanoff@earthlink.net>; Date: Sun, 12 May 2013 21:51:20 -0500 (GMT-05:00); David, Be certain to specify FCC Part 15 Class B limits. Those are the limits applicable to home and office environments. After that, it will then be up to you to determine if Part 15, Class B limits; /archives//html/RFI/2013-05/msg00037.html (12,116 bytes)
113. Re: [RFI] Comments on RFI from Ductless Air Conditioning Units? (score: 1): Author: Dale <svetanoff@earthlink.net>; Date: Mon, 13 May 2013 10:47:35 -0500 (GMT-05:00); Cortland, Thank you for the update on exempted items per Part 15. However, I note the wording "not cause harmful interference" still applies. That's great, but as has been noted many times in this fo; /archives//html/RFI/2013-05/msg00042.html (12,502 bytes)
114. Re: [RFI] Charge Pump IC's & RFI? (score: 1): Author: Dale <svetanoff@earthlink.net>; Date: Sun, 30 Jun 2013 13:56:17 -0500 (GMT-05:00); David, Cortland, Jim, and All, As said by others, the chip makers do not need to meet RFI requirements, but it is the users (in this case, the makers of end devices which sue the chips) that are resp; /archives//html/RFI/2013-06/msg00054.html (10,286 bytes)
115. Re: [RFI] Apple and Motorola Wall Chargers (score: 1): Author: Dale <svetanoff@earthlink.net>; Date: Fri, 16 Aug 2013 12:54:32 -0400 (EDT); Michael, A "quiet" switcher (that term should be classed as an oxymoron) may well not disturb your radios or other equipment, but it sure can raise havoc with 160m and AM b'cast band reception. I hav; /archives//html/RFI/2013-08/msg00005.html (11,103 bytes)
116. Re: [RFI] Keyboard RFI (score: 1): Author: Dale <svetanoff@earthlink.net>; Date: Thu, 22 Aug 2013 14:12:36 -0500 (GMT-05:00); Charlie, While the hash noise must truly be bad news, that 50V on the CATV line could be even worse. Is that 50VDC or 50VAC? If it is AC, it sounds as if there is significant leakage current (or coup; /archives//html/RFI/2013-08/msg00018.html (9,485 bytes)
117. Re: [RFI] KG2V's new RFI rule of thumb... (score: 1): Author: Dale <svetanoff@earthlink.net>; Date: Sat, 24 Aug 2013 15:05:41 -0500 (GMT-05:00); Gentlemen, To a great extent, I also agree with Charlie's "rule". However, the REAL problem exists in two areas: regulatory bodies (such as the FCC and the EU Commission, among others) and manufactur; /archives//html/RFI/2013-08/msg00034.html (13,255 bytes)
118. Re: [RFI] Quiet Dimmers For 120V Incandescents (score: 1): Author: Dale <svetanoff@earthlink.net>; Date: Sat, 24 Aug 2013 23:40:14 -0500 (GMT-05:00); Jim, Full disclosure: I have not purchased dimmers in at least 5 years or so. OTOH, my house has 4 dimmers for incandescent lights and 3 speed controls for ceiling fans (these are wall-mounted like a; /archives//html/RFI/2013-08/msg00036.html (9,330 bytes)
119. Re: [RFI] Recent RFI status - Direct TV and Dish? (score: 1): Author: Dale <svetanoff@earthlink.net>; Date: Mon, 26 Aug 2013 23:37:10 -0500 (GMT-05:00); Mike, It sounds to me like the manufacturer of the switcher wall wart bothered to put RFI suppression on only 1 side of the line, rather than both sides. I'll also guess that there is no line-to-line; /archives//html/RFI/2013-08/msg00065.html (11,560 bytes)
120. Re: [RFI] ONE wallwart (score: 1): Author: Dale <svetanoff@earthlink.net>; Date: Sat, 31 Aug 2013 12:52:19 -0500 (GMT-05:00); Charlie, Yes, there are places to go get "clean" linear power supplies, but they are getting fewer by the year. There are 2 commercial vendors I can recommend, strictly on the basis if having been a; /archives//html/RFI/2013-08/msg00072.html (12,234 bytes)

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