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Total 1809 documents matching your query.

321. Re: [RFI] Low RFI HDTV (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Mon, 29 Dec 2008 11:26:33 -0800
Which translates into 30-40% more power pulled out of the wall and onto your electricity bill. Especially in CA, we think about that a lot, where graduated rates rise to 0.35/kWh for half of the year
/archives//html/RFI/2008-12/msg00094.html (7,990 bytes)

322. Re: [RFI] Plasma (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Tue, 30 Dec 2008 12:47:44 -0800
That's not the way I read this spreadsheet. Indeed, if you sort on watts/sq inch, most of the plasma sets are grouped toward the bottom of the chart (least efficient) and most of the LCDs are grouped
/archives//html/RFI/2008-12/msg00099.html (7,682 bytes)

323. Re: [RFI] Car Advice (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Wed, 31 Dec 2008 09:38:20 -0800
I had MISERABLE luck with my Toyota Sequoia -- 100W on 20M crashed the car's computer and put me in "limp home" mode in the middle of the Nevada desert. Luckily I was able to reboot it by pulling bat
/archives//html/RFI/2008-12/msg00111.html (7,471 bytes)

324. Re: [RFI] You think YOU have RFI problems? ;-) (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Wed, 31 Dec 2008 09:49:28 -0800
I strongly disagree. Those communities are interlopers. I'm a native of WV, and lived there when Green Bank was built (not nearby, at the other end of the state). At that time, Green Bank was in the
/archives//html/RFI/2008-12/msg00112.html (10,749 bytes)

325. Re: [RFI] Car Advice (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Wed, 31 Dec 2008 12:19:00 -0800
Yeah, those production line workers sure don't need or deserve the money to feed and educate their kids. Let them go into bread lines. Give it to the executives who ran these companies into the groun
/archives//html/RFI/2008-12/msg00127.html (8,458 bytes)

326. Re: [RFI] You think YOU have RFI problems? ;-) (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Wed, 31 Dec 2008 15:01:28 -0800
These SHOULD be non-problems if the FCC were to enforce its own rules (Part 15, for example), and even write their own Rules so that non-radio equipment (washing machines, chargers for power tools, l
/archives//html/RFI/2008-12/msg00132.html (10,143 bytes)

327. Re: [RFI] Car Advice (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Wed, 31 Dec 2008 17:11:37 -0800
Modern cars are FULL of electronics. I've heard it said that there are multiple microprocessors scattered around the various systems. When I keyed up in that Toyota Sequoia, the first symptom was tha
/archives//html/RFI/2008-12/msg00134.html (8,296 bytes)

328. Re: [RFI] More cowbell? (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Wed, 31 Dec 2008 18:50:02 -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/msg00138.html (6,606 bytes)

329. Re: [RFI] OT: bouncing posts to Moderator Re: Car Advice (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Thu, 01 Jan 2009 00:12:42 -0800
Yes. Four so far today. :) Jim _______________________________________________ RFI mailing list RFI@contesting.com http://lists.contesting.com/mailman/listinfo/rfi
/archives//html/RFI/2009-01/msg00000.html (6,203 bytes)

330. Re: [RFI] More cowbell? (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Thu, 01 Jan 2009 13:29:46 -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/2009-01/msg00007.html (6,971 bytes)

331. Re: [RFI] Noisy routers (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Sun, 04 Jan 2009 20:27:18 -0800
This is an OLD WIVES TALE! The earth is NOT a sump into which noise is poured! A connection to EARTH IS NOT PART OF A CURE FOR NOISE OR RFI. Proper shielding and termination of cable shields IS. Whe
/archives//html/RFI/2009-01/msg00019.html (8,928 bytes)

332. Re: [RFI] A RF Quiet Electric Fencer needed (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Mon, 05 Jan 2009 14:24:20 -0800
That's exactly right. The relative strength of higher order harmonics (that's us) is directly proportional to the rise time. I don't know anything about electric fence circuitry, but if the major con
/archives//html/RFI/2009-01/msg00034.html (9,519 bytes)

333. Re: [RFI] Electric fencer RFI (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Tue, 06 Jan 2009 09:55:35 -0800
When thinking about solving these issues, it helps to realize that it's CURRENT flowing through an ANTENNA (the fence wire or unshielded wiring within the electronics) that causes us grief. No proble
/archives//html/RFI/2009-01/msg00039.html (6,951 bytes)

334. Re: [RFI] wiring a 2-way radio in a Honda car (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Thu, 08 Jan 2009 10:54:46 -0800
I'd be interested in seeing his response to my issues with my Toyota Sequoia, whose main computer locked up with 100 watts on 20M. Can you post contact information for Toyota? Thanks and 73, Jim K9YC
/archives//html/RFI/2009-01/msg00047.html (7,149 bytes)

335. Re: [RFI] CFLs and LEDs (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Sun, 11 Jan 2009 09:49:23 -0800
I would expect any RFI from an LED to be related to power conversion. 73, Jim K9YC _______________________________________________ RFI mailing list RFI@contesting.com http://lists.contesting.com/mail
/archives//html/RFI/2009-01/msg00062.html (7,925 bytes)

336. Re: [RFI] Fair Rite #31 Mix Material (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Sun, 11 Jan 2009 19:06:47 -0800
Of course. Fair-Rite INVENTED the #31 mix about five years ago. Since then, they have expanded and re-shaped their product line to build nearly HF suppression components in nearly all common form fac
/archives//html/RFI/2009-01/msg00070.html (10,800 bytes)

337. Re: [RFI] Fair Rite #31 Mix Material (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Sun, 11 Jan 2009 19:50:52 -0800
Paul, No, I don't see a half-inch o.d. donut toroid in #31 in the book. But perhaps the problem is that you may have preconceived notions about what form factors work for a given application. I've us
/archives//html/RFI/2009-01/msg00076.html (10,558 bytes)

338. Re: [RFI] Fair Rite #31 Mix Material (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Sun, 11 Jan 2009 20:07:47 -0800
This simple formula applies ONLY in the frequency range where the equivalent circuit is R + L in series. That circuit applies at low frequencies, in the spectrum where the part is used as an inductor
/archives//html/RFI/2009-01/msg00079.html (10,230 bytes)

339. Re: [RFI] Fair Rite #31 Mix Material (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Sun, 11 Jan 2009 20:09:14 -0800
Not below 5 MHz it wouldn't. #31 behaves very differently below about 5 MHz. Jim _______________________________________________ RFI mailing list RFI@contesting.com http://lists.contesting.com/mailma
/archives//html/RFI/2009-01/msg00080.html (8,959 bytes)

340. Re: [RFI] Fair Rite #31 Mix Material (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Sun, 11 Jan 2009 20:21:05 -0800
I'll make an educated guess. Fair-Rite makes cores for several uses. One major uses are inductors and transformers, where they are mostly working in the range where their resistance is small in propo
/archives//html/RFI/2009-01/msg00081.html (10,060 bytes)


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