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Total 1809 documents matching your query.

301. Re: [RFI] Kenwood TM-D700 (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Thu, 30 Oct 2008 11:08:57 -0700
1,000 uF is a good starting point. I'd also use a 0.47 uF non-lytic in parallel. 73, Jim K9YC _______________________________________________ RFI mailing list RFI@contesting.com http://lists.contesti
/archives//html/RFI/2008-10/msg00092.html (7,827 bytes)

302. Re: [RFI] Kenwood TM-D700 (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Sat, 01 Nov 2008 08:19:12 -0700
Bring a 12V battery up to full charge, then let it run down while running the radio, monitoring the voltage, and observing the result. To simulate installation in a typical vehicle, use 30 ft of #14-
/archives//html/RFI/2008-11/msg00001.html (6,938 bytes)

303. Re: [RFI] RFI (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Fri, 21 Nov 2008 10:21:44 -0800
Sounds like it needs my "bucket treatment" -- find a big bucket, fill it with water, put the charger in twice, take it out once. 73, Jim K9YC _______________________________________________ RFI maili
/archives//html/RFI/2008-11/msg00044.html (6,807 bytes)

304. Re: [RFI] ethernet EMI revisited - questions for the pros (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Sat, 29 Nov 2008 19:07:26 -0800
quite Mike, Before you buy anything, study my RFI tutorial if you haven't already. http://audiosystemsgroup.com/RFI-Ham.pdf The issue of 10MB or 100MB may not be as important as the the mechanisms th
/archives//html/RFI/2008-11/msg00057.html (10,376 bytes)

305. Re: [RFI] U-verse VDSL (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Tue, 02 Dec 2008 16:13:57 -0800
http://audiosystemsgroup.com/RFI-Ham.pdf 73, Jim K9YC _______________________________________________ RFI mailing list RFI@contesting.com http://lists.contesting.com/mailman/listinfo/rfi
/archives//html/RFI/2008-12/msg00001.html (6,713 bytes)

306. Re: [RFI] [TenTec] OT Florescent Ballast's (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Mon, 08 Dec 2008 21:57:43 -0800
Yes, that's what the Rules say. Please give me the phone number you call to cause them to be enforced. :) 73, Jim K9YC _______________________________________________ RFI mailing list RFI@contesting.
/archives//html/RFI/2008-12/msg00006.html (7,108 bytes)

307. Re: [RFI] Modem - Wireless - CAT 5 (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Wed, 10 Dec 2008 10:21:39 -0800
Hi Rick, What signal are you splitting? Are you talking about an actual Ethernet signal or a POTS line? Ethernet signals use at least two pairs in a CAT5 cable, and depending on the speed of the conn
/archives//html/RFI/2008-12/msg00008.html (7,585 bytes)

308. Re: [RFI] Toroids for Common Mode Chokes on CAT5 Cables (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Thu, 11 Dec 2008 09:55:48 -0800
Depending length of the cable, you may not need chokes on both ends. Check out my specific recommendations in http://audiosystemsgroup.com/RFI- Ham.pdf It depends on frequency/wavelength. The common
/archives//html/RFI/2008-12/msg00010.html (7,689 bytes)

309. Re: [RFI] RFI to a Home Theater System (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Fri, 12 Dec 2008 13:00:01 -0800
Send the following link to Polk Audio's "engineers." You should tell them that the author (me) is a Fellow of the AES, Chair of the AES Technical Committee on EMC, and Vice-Chair of the AES Standards
/archives//html/RFI/2008-12/msg00019.html (10,468 bytes)

310. Re: [RFI] CAT 5 SAGA (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Sat, 13 Dec 2008 09:57:14 -0800
DSL is pretty low frequency (a few MHz or less). Attenuation is going to be low on all pairs. What's different is noise immunity, and the blue pair will be the best (because it has the tighter twist)
/archives//html/RFI/2008-12/msg00024.html (6,741 bytes)

311. Re: [RFI] ATT Uverse RFI problem (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Mon, 15 Dec 2008 17:05:11 -0800
Many mailing lists, including this one, don't allow attachments. That's good, because it limits the nasty games than be played. I'd like to see your photos. Maybe you can post them somewhere with a l
/archives//html/RFI/2008-12/msg00027.html (7,829 bytes)

312. Re: [RFI] ATT Uverse RFI problem (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Tue, 16 Dec 2008 10:20:23 -0800
form, See Appendix One of http://audiosystemsgroup.com/RFI-Ham.pdf The cable clamp form would also work fine if it's big enough to accomodate the required number of turns. Again, see data in the tuto
/archives//html/RFI/2008-12/msg00037.html (8,392 bytes)

313. Re: [RFI] Nasty RFI wiping out higher bands (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Tue, 16 Dec 2008 15:43:34 -0800
What model do you have? I'm looking for one right now! Jim K9YC _______________________________________________ RFI mailing list RFI@contesting.com http://lists.contesting.com/mailman/listinfo/rfi
/archives//html/RFI/2008-12/msg00044.html (8,583 bytes)

314. Re: [RFI] DirecTV to ground or not to ground (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Sun, 21 Dec 2008 10:01:51 -0800
Yes. The NEC was written by very good engineers, and has included input from some with excellent background in audio, video, and RF. I haven't found anything in NEC that is in conflict with good engi
/archives//html/RFI/2008-12/msg00058.html (8,286 bytes)

315. Re: [RFI] DirecTV to ground or not to ground (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Tue, 23 Dec 2008 01:31:04 -0800
Why are you beating up on NEC? It's a very good safety code. It is not a textbook. You want to learn how things work and why the code is written the way it is, you study a textbook. 73, Jim K9YC ____
/archives//html/RFI/2008-12/msg00064.html (8,288 bytes)

316. Re: [RFI] Low RFI HDTV (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Tue, 23 Dec 2008 17:34:19 -0800
Search the archives of this list. Exactly this question came up only last week. Yes, plasma is BAD news for RFI (and also draws a lot more power out of the wall). Several guys chimed in with good thi
/archives//html/RFI/2008-12/msg00067.html (6,884 bytes)

317. Re: [RFI] Low RFI HDTV (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Tue, 23 Dec 2008 20:36:14 -0800
SANITY CHECK! Unless the shielding of your radios is beyond abysmal, spacing between your rigs and the monitors does not matter! What matters is distance between the radiating part of your transmitti
/archives//html/RFI/2008-12/msg00069.html (7,086 bytes)

318. Re: [RFI] DirecTV to ground or not to ground (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Wed, 24 Dec 2008 21:10:56 -0800
One reference is the tutorial cited below. While it's written for sound and video contractors, the fundamentals apply to hams. http://audiosystemsgroup.com/SurgeXPowerGround.pdf It all comes down to
/archives//html/RFI/2008-12/msg00073.html (9,932 bytes)

319. Re: [RFI] DirecTV to ground or not to ground (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Thu, 25 Dec 2008 23:50:24 -0800
Exactly right. All of those interconnections have inductance and resistance, lightning will be closer to one point in the building than others. In addition, there's voltage and current magnetically i
/archives//html/RFI/2008-12/msg00080.html (8,913 bytes)

320. Re: [RFI] Low RFI HDTV (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Sun, 28 Dec 2008 20:30:14 -0800
Check the archives. Discussion only 10 days ago. Several have noted that Sony LCDs they own are benign with respect to RFI. I've had my eye on a Sony XBR for a while and watching prices. Pulled the t
/archives//html/RFI/2008-12/msg00087.html (8,576 bytes)


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