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1. Re: [RFI] 120v halogen lights (score: 1): Author: stuart benner <w3stu@myactv.net>; Date: Mon, 5 Apr 2004 12:55:06 -0400; The reduction in life of an incandescent lamp when operated on DC versus AC is attributable to a phenomenon known as "DC notching." With DC applied, the tungsten molecules migrate within the filament; /archives//html/RFI/2004-04/msg00020.html (10,109 bytes)
2. RE: [RFI] TV cable splitters (score: 1): Author: "Stu Benner" <w3stu@myactv.net>; Date: Tue, 1 Feb 2005 21:39:25 -0500; Jim, I agree with Mike that an insertion loss like you measured (3.5 dB) is quite high. If you meant a splitting loss of 3 db (which is the nominal value for a two-way splitter since power is divided; /archives//html/RFI/2005-02/msg00003.html (8,374 bytes)
3. Re: [RFI] Electric company problem (score: 1): Author: "Stu Benner" <w3stu@myactv.net>; Date: Sat, 10 Dec 2005 12:24:27 -0500; Sorry Mike, the short answer is that raising the antenna will have little effect on the signal amplitude. Fixing the problem at the source is the solution. The description of your dealings with the p; /archives//html/RFI/2005-12/msg00022.html (8,481 bytes)
4. Re: [RFI] Digital TV Box Generates 121.5MHz Signal (score: 1): Author: "Stu Benner" <w3stu@myactv.net>; Date: Fri, 20 Jan 2006 07:24:59 -0500; I would be surprised to learn that this doesn't happen more often. The sample clock used in a large number of video CODECs is 13.5 MHz. 121.5 MHz is the 9th harmonic of that frequency, therefore, the; /archives//html/RFI/2006-01/msg00089.html (7,861 bytes)
5. Re: [RFI] Fan Noise on Repeater (score: 1): Author: "Stu Benner" <w3stu@myactv.net>; Date: Tue, 9 May 2006 07:34:45 -0400; Rod, A few questions for you to help better understand the problem: 1) On what band does the repeater operate? 2) What make and model are the repeater radios? 3) What is the operating voltage of the; /archives//html/RFI/2006-05/msg00001.html (8,304 bytes)
6. Re: [RFI] Fan Noise on Repeater (score: 1): Author: "Stu Benner" <w3stu@myactv.net>; Date: Tue, 9 May 2006 17:02:15 -0400; Dale, you're right on point. Actually, a number of my questions (#4, #5, #8) were digging at understanding what the CE coupling paths may be and what the power source impedances may have looked like; /archives//html/RFI/2006-05/msg00007.html (14,884 bytes)
7. Re: [RFI] 1Hz Noise (score: 1): Author: "Stu Benner" <w3stu@myactv.net>; Date: Tue, 23 May 2006 06:56:47 -0400; Kelly, Two possibilities quickly come to mind: 1) an electric fence charger 2) the local oscillator (L.O.) of a scanning receiver The repetition rate of (1) is usually a bit lower than 1 Hz. The sign; /archives//html/RFI/2006-05/msg00036.html (7,446 bytes)
8. Re: [RFI] GB> OT - Broadband Over Gas Lines (score: 1): Author: "Stu Benner" <w3stu@myactv.net>; Date: Mon, 18 Sep 2006 17:52:14 -0400; An ultrawideband (UWB) transmission is somewhat similar in concept to direct-sequence spread spectrum. The bandwidth of the signal is, however, much broader. The power spectral density of the signal; /archives//html/RFI/2006-09/msg00021.html (8,830 bytes)
9. Re: [RFI] Home networking birdies (score: 1): Author: "Stu Benner" <w3stu@myactv.net>; Date: Tue, 19 Sep 2006 22:46:52 -0400; Don, I believe you may have missed the "smoking gun" or maybe I don't quite understand how you did the tests. It appears that the Netgear hub, not the router, is the primary source of your problem. Y; /archives//html/RFI/2006-09/msg00026.html (11,606 bytes)
10. Re: [RFI] Winding RG-6 around a toroid (score: 1): Author: "Stu Benner" <w3stu@myactv.net>; Date: Tue, 19 Sep 2006 22:52:05 -0400; The impedance introduced on the outside of the shield by wrapping the coax around the toroid will have no effect on the desired signal *inside* the coax. If you were too aggressive with the installat; /archives//html/RFI/2006-09/msg00027.html (8,078 bytes)
11. Re: [RFI] DFing an HF RFI source (score: 1): Author: "Stu Benner" <w3stu@myactv.net>; Date: Mon, 2 Oct 2006 21:22:33 -0400; Kelly, This is not a direct answer to your question but may lead you down a path to the source. My first guess at the source of this problem would be an electric fence, which would be an impulse (bro; /archives//html/RFI/2006-10/msg00009.html (9,673 bytes)
12. [RFI] Celwave Isolator Specifications (score: 1): Author: "Stu Benner" <w3stu@myactv.net>; Date: Thu, 5 Oct 2006 07:35:18 -0400; I've scoured the web and tried contacting Celwave/RFS/Ferrocom/Alcatel in an attempt to locate the specifications/data sheet for the Celwave Model CD220-B isolator. Can anyone provide to me this info; /archives//html/RFI/2006-10/msg00015.html (7,398 bytes)
13. Re: [RFI] Intermod/Rectification (score: 1): Author: "Stu Benner" <w3stu@myactv.net>; Date: Mon, 23 Oct 2006 18:10:17 -0400; Mike, Although you stated that there seems to be some dependency on weather conditions, I would recommend that you first verify that the problem is not a function of your receiver. Have you observed; /archives//html/RFI/2006-10/msg00041.html (9,633 bytes)
14. Re: [RFI] intermod/rectification (score: 1): Author: "Stu Benner" <w3stu@myactv.net>; Date: Wed, 25 Oct 2006 22:10:06 -0400; I agree with much of what Earl says. There are usually lots of other poorly bonded joints at places other than in your antenna system. Consider using some sort of loop antenna with which you can DF t; /archives//html/RFI/2006-10/msg00045.html (11,966 bytes)
15. Re: [RFI] Interference on TV using 2 meters (score: 1): Author: "Stu Benner" <w3stu@myactv.net>; Date: Thu, 26 Oct 2006 09:11:30 -0400; They key data point in your post is that you terminated the antenna input to the TV and the interference remained. This eliminates cable system leakage as the primary interference coupling path (mayb; /archives//html/RFI/2006-10/msg00049.html (9,627 bytes)
16. Re: [RFI] Haolgens AND . . . (score: 1): Author: "Stu Benner" <w3stu@myactv.net>; Date: Tue, 21 Nov 2006 20:16:23 -0500; The reduction in life of an incandescent lamp when operated on DC versus AC is attributable electromigration, a phenomenon in lamps commonly called "DC notching." With DC applied, the tungsten molecu; /archives//html/RFI/2006-11/msg00078.html (10,139 bytes)

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