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101. Re: [RFI] Semiconductor firms & EMI (score: 1): Author: Cortland Richmond <ka5s@earthlink.net>; Date: Wed, 21 Jul 2004 12:58:59 -0700 (GMT-07:00); You mistake my meaning, Jim. It is rare a mfr will admit its own products need additional mitigation. I've been working in EMC since 1987, computers, telecom and now medical equipment, and they're al; /archives//html/RFI/2004-07/msg00160.html (7,539 bytes)
102. RE: [RFI] BPL (score: 1): Author: "Cortland Richmond" <ka5s@earthlink.net>; Date: Wed, 21 Jul 2004 20:55:31 -0700; However... if I am not mistaken, recording and rebroadcast of public service comms is forbidden by the Communications Act. One would have to use a simulated communication, or Amateur 6 or 10 meters F; /archives//html/RFI/2004-07/msg00167.html (7,157 bytes)
103. RE: [RFI] Amateur transceiver must accept interference? (score: 1): Author: "Cortland Richmond" <ka5s@earthlink.net>; Date: Fri, 23 Jul 2004 23:05:15 -0700; Any receiver operating between 30 and 960 Mhz (and radar detectors in their own ranges) must meet specific FCC Part 15 requirements. These deal with things like LO radiation. A device containing or i; /archives//html/RFI/2004-07/msg00179.html (8,137 bytes)
104. [RFI] Recording actual PS comms for BPL effects demo (score: 1): Author: "Cortland Richmond" <ka5s@earthlink.net>; Date: Sun, 25 Jul 2004 09:18:33 -0700; I'm also no lawyer, but I imagine that sites which record transmissions are probably violating the Communications Act. Sites which merely repeat (for no charge) what's being received real-time are IM; /archives//html/RFI/2004-07/msg00181.html (7,828 bytes)
105. Re: [RFI] toroids (score: 1): Author: Cortland Richmond <ka5s@earthlink.net>; Date: Sun, 15 Aug 2004 06:51:14 -0700 (GMT-07:00); Well done, Ian; clear, concise, and useful. One sentence of your post particularly resonates with me (heh!): "In fact there are *no* exact equivalents between different manufacturers - they don't eve; /archives//html/RFI/2004-08/msg00021.html (7,325 bytes)
106. Re: [RFI] toroids (score: 1): Author: Cortland Richmond <ka5s@earthlink.net>; Date: Sun, 15 Aug 2004 07:07:47 -0700 (GMT-07:00); GOOD topic! I like Tom's approach myself; it's easy to do. Some of the folks I've worked with (and for) require more. And the impedance in a fixture is not a CERTAIN predictor of performance on a wir; /archives//html/RFI/2004-08/msg00022.html (7,387 bytes)
107. Re: [RFI] Editorial on BPL in Electronic Design Magazine (score: 1): Author: Cortland Richmond <ka5s@earthlink.net>; Date: Tue, 17 Aug 2004 08:39:50 -0700 (GMT-07:00); Pete, Corridor uses a microwave signal carried in a surface-wave mode (think of it as a waveguide with no walls) on wires to route high-speed data. The concept dates back to "G-line." In Corridor's a; /archives//html/RFI/2004-08/msg00037.html (7,898 bytes)
108. Re: [RFI] Documenting Power Line Noise (score: 1): Author: Cortland Richmond <ka5s@earthlink.net>; Date: Tue, 24 Aug 2004 14:25:18 -0700 (GMT-07:00); Ford, May I suggest a passenger-witnessed and recorded video with a portable or mobile radio? Cortland RIchmond KA5S --Original Message-- My question? How do I document my lack of noise today, so I c; /archives//html/RFI/2004-08/msg00062.html (7,512 bytes)
109. [RFI] BPL: NTIA report discussed in Conformity Magazine (score: 1): Author: "Cortland Richmond" <ka5s@earthlink.net>; Date: Tue, 7 Sep 2004 22:45:44 -0700; Conformity Magazine, covering EMC,Safety and other regulatory compliance matters, has some remarks on the interim supplement to part 1 of the NTIA report. http://www.conformity.com/current_newsbreaks; /archives//html/RFI/2004-09/msg00042.html (6,700 bytes)
110. RE: [RFI] Earth isolation (score: 1): Author: Cortland Richmond <ka5s@earthlink.net>; Date: Thu, 9 Sep 2004 10:08:07 -0700 (GMT-07:00); Jumping in late here... the green wire, AC safety ground must be able to carry enough current to open a fuse or circuit breaker if a hot-to-chassis AC power short develops, and to keep the chassis-to; /archives//html/RFI/2004-09/msg00060.html (10,203 bytes)
111. [RFI] 40 meter intruder? (score: 1): Author: Cortland Richmond <ka5s@earthlink.net>; Date: Thu, 9 Sep 2004 17:23:09 -0700 (GMT-07:00); The ARRL web site reports widely a heard intruder on 40 meters, consisting of closely spaced carriers at 7238.063, 7238.150, 7238.237 and 7238.412 kHz. http://www.arrl.org/news/stories/2004/09/09/103; /archives//html/RFI/2004-09/msg00061.html (7,654 bytes)
112. RE: [RFI] 40 meter intruder? (score: 1): Author: "Cortland Richmond" <ka5s@earthlink.net>; Date: Thu, 9 Sep 2004 20:08:54 -0700; continuing: What's significant about 7238? Well, it's in the LSB of 7240. Since the signal is heard over such a wide area, we might do well to telephone ops in or near Prescott AZ known to have "big; /archives//html/RFI/2004-09/msg00062.html (7,258 bytes)
113. Re: [RFI] Where to protect control cables? (score: 1): Author: Cortland Richmond <ka5s@earthlink.net>; Date: Mon, 4 Oct 2004 18:08:19 -0700 (GMT-07:00); Dan, I'd ask "Where does stray RF flow now, and where do I want it to flow when I'm done?" I imagine you really do not need RF in or on your control cables to begin with, and with this in mind, the q; /archives//html/RFI/2004-10/msg00003.html (7,341 bytes)
114. Re: Re: [RFI] 160 Meter Interference (score: 1): Author: Cortland Richmond <ka5s@earthlink.net>; Date: Wed, 6 Oct 2004 13:18:58 -0700 (GMT-07:00); I have had some luck hunting down noise sources using small nonresonant loops on a handheld, wideband receiver. I demonstrated the method at the Puget Sound area Mike and Key Club's September meeting; /archives//html/RFI/2004-10/msg00021.html (8,315 bytes)
115. RE: [RFI] Part 15 equivalents in other countries? (score: 1): Author: Cortland Richmond <ka5s@earthlink.net>; Date: Tue, 12 Oct 2004 10:50:02 -0700 (GMT-07:00); Also from Google: (excerpt) DRAFT NEW RECOMMENDATION ITU-R SM.[DOC.1/19] TECHNICAL AND OPERATING PARAMETERS AND SPECTRUM REQUIREMENTS FOR SHORT-RANGE RADIOCOMMUNICATION DEVICES (Question ITU-R 213/1); /archives//html/RFI/2004-10/msg00030.html (7,905 bytes)
116. RE: [RFI] Astron fan circuit noise (score: 1): Author: "Cortland Richmond" <ka5s@earthlink.net>; Date: Fri, 15 Oct 2004 07:59:01 -0700; I agree with Dale. (We're in the same line of work.) I've heard EMI from DC brushless fans before. Usually, not enough to be a problem, but quite similar to what you've noted. Probably, some fans hav; /archives//html/RFI/2004-10/msg00035.html (7,669 bytes)
117. Re: Ie: [RFI] Ferrite Beads (score: 1): Author: Cortland Richmond <ka5s@earthlink.net>; Date: Fri, 22 Oct 2004 12:39:46 -0700 (GMT-07:00); When I had to interview job applicants who claimed EMI experience, I liked to hand them a ferrite cylinder or clip-on and ask three questions: 1. What is it? 2. What does it do? 3. How? Cortland KA5S; /archives//html/RFI/2004-10/msg00100.html (7,290 bytes)
118. Re: [RFI] RF Impedance measurement (score: 1): Author: Cortland Richmond <ka5s@earthlink.net>; Date: Mon, 25 Oct 2004 09:27:14 -0700 (GMT-07:00); George, I have several of these devices and I prefer the MFJ-259B, as it is easier for me to operate. However, we all have different needs; the AEA/Timewave CIA and VIA, and their predecessors, are p; /archives//html/RFI/2004-10/msg00121.html (7,752 bytes)
119. Re: [RFI] NOISE GADGETS (score: 1): Author: "Cortland Richmond" <ka5s@earthlink.net>; Date: Wed, 10 Nov 2004 20:24:07 -0800; For whatever it may be worth, in a "previous life," our equipment ran at 135 ohms for doing balance and noise tests on VF gear. DSL was 100 ohms. Cortland ____________________________________________; /archives//html/RFI/2004-11/msg00032.html (7,479 bytes)
120. Re: [RFI] DSC Alarm Panel 75 Meters/False Alarms (score: 1): Author: "Cortland Richmond" <ka5s@earthlink.net>; Date: Wed, 17 Nov 2004 12:59:26 -0800; 9802. This chapter does not apply to: (a) Any employee of a service dealer while the employee is engaged in activities within the normal scope of the employer's business. (b) The repair, service, or; /archives//html/RFI/2004-11/msg00048.html (9,391 bytes)

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