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Total 420 documents matching your query.

341. Re: [RFI] LED lighting (score: 1)
Author: CR <ka5s@earthlink.net>
Date: Mon, 27 Jul 2015 18:05:13 -0400
Ed, W1RFI Lowell MI has been replacing their incandescents with LED's, and its pretty close; I'll throw an antenna on the car and check theirs for "harmful interference". Cortland KA5S ______________
/archives//html/RFI/2015-07/msg00089.html (9,003 bytes)

342. Re: [RFI] ARRL Board of Directors resolution related to FCC enforcement of radio-interference issues (score: 1)
Author: CR <ka5s@earthlink.net>
Date: Tue, 4 Aug 2015 09:01:58 -0400
That it went away quietly with no fanfare raises questions. You almost have to go to the pilot groups to find out the real details. "LightSquared ground based transmitters to interfere with GPS" as s
/archives//html/RFI/2015-08/msg00028.html (12,209 bytes)

343. Re: [RFI] Solar Panel/Controller Issue (RE: Bridie issue on 50.098) (score: 1)
Author: CR <ka5s@earthlink.net>
Date: Fri, 21 Aug 2015 15:53:26 -0400
On 8/21/2015 12:48 PM, Tom Lizak wrote: Has anyone had any problems with RFI from an array of solar panels via their controller/charging system ? I'm "looking forward" (not actually) to problems from
/archives//html/RFI/2015-08/msg00077.html (7,935 bytes)

344. Re: [RFI] New bulb? Acandescence in Finallly bulb (score: 1)
Author: CR <ka5s@earthlink.net>
Date: Sun, 13 Sep 2015 02:11:12 -0400
I just had a message returned as "The message's content type was not explicitly allowed," probably from leftover scraps of html; I'll try sending it again. When I was quite a bit younger (1956) my fo
/archives//html/RFI/2015-09/msg00020.html (9,509 bytes)

345. Re: [RFI] Auto quieting (score: 1)
Author: CR <ka5s@earthlink.net>
Date: Mon, 5 Oct 2015 04:35:58 -0400
Different problems may take different solutions. To carry RF current between poorly bonded body parts we will need low resistance, low inductance bonds, the proverbial short, wide strap or large gaug
/archives//html/RFI/2015-10/msg00009.html (10,276 bytes)

346. Re: [RFI] Auto quieting (score: 1)
Author: CR <ka5s@earthlink.net>
Date: Sun, 11 Oct 2015 03:26:13 -0400
On 10/11/2015 2:59 AM, Jim Brown wrote: Lessee -- it's an emergency, we're likely on emergency power, maybe QRP, and it's irrelevant that you're losing half the TX power in a feedline? Could be. We n
/archives//html/RFI/2015-10/msg00023.html (9,469 bytes)

347. Re: [RFI] Auto quieting (score: 1)
Author: CR <ka5s@earthlink.net>
Date: Sun, 11 Oct 2015 12:52:28 -0400
Paralleled Zipcord could give a good match. However, an antenna tuner/transmatch (e.g: http://www.zgitaly.it/italiano/area.asp?sez=5&id=32) doesn't compensate for loss in the feed line. Loss in the f
/archives//html/RFI/2015-10/msg00026.html (10,307 bytes)

348. Re: [RFI] Auto quieting (score: 1)
Author: CR <ka5s@earthlink.net>
Date: Mon, 12 Oct 2015 08:34:59 -0400
On 10/12/2015 2:15 AM, Roger (K8RI) wrote: On 10/10/2015 3:15 AM, Jim Brown wrote: On Fri,10/9/2015 10:31 PM, Roger (K8RI) wrote: I fail to see where two runs of RG8 size cables in a car, large SUV,
/archives//html/RFI/2015-10/msg00031.html (10,814 bytes)

349. Re: [RFI] Laser Christmas Lights (score: 1)
Author: CR <ka5s@earthlink.net>
Date: Sat, 5 Dec 2015 14:21:56 -0500
Unfortunately, the FCC then takes the position that is will not comment on active complaint cases, and in too many cases, it is not at all apparent that the FCC has done anything Maybe we could talk
/archives//html/RFI/2015-12/msg00053.html (9,051 bytes)

350. Re: [RFI] Tracing wires. (score: 1)
Author: Cortland Richmond <ka5s@earthlink.net>
Date: Thu, 21 Jan 2016 13:14:54 -0500
I found I could sweep a wall and locate a "hot" wire behind sheetrock, plaster, et cetera. I would press the button, then "sweep" the tip across a wall and watch for a red LED on it to illuminate. Wh
/archives//html/RFI/2016-01/msg00044.html (11,306 bytes)

351. Re: [RFI] can a tower re-radiate RFI? (score: 1)
Author: Cortland Richmond <ka5s@earthlink.net>
Date: Sat, 23 Jan 2016 21:16:36 -0500
On 1/23/2016 1:42 PM, WW3S wrote: its very broadbanded, from AM broadcast band to about 5 mhz, then fades out....its about 20 over 9, I can null part of it out with the noise blanker, but its obvious
/archives//html/RFI/2016-01/msg00058.html (8,074 bytes)

352. Re: [RFI] Solar Power RFI (score: 1)
Author: Cortland Richmond <ka5s@earthlink.net>
Date: Sun, 31 Jan 2016 00:43:41 -0500
Even if a device using or generating RF meets Part 15 limits (its unlawful to sell otherwise) it can still cause harmful interference -- which makes it illegal for us to turn it on/(see § 15.15 Gener
/archives//html/RFI/2016-01/msg00114.html (10,313 bytes)

353. Re: [RFI] cops zero in on noisy grow light ballasts (score: 1)
Author: Cortland Richmond <ka5s@earthlink.net>
Date: Wed, 17 Feb 2016 16:00:34 -0500
I'm using Dragon naturally speaking; it's quicker to speak the text than it is to type it, fix the mistakes, retype the mistakes I added fixing the mistakes, and run spell checker again. Cortland ___
/archives//html/RFI/2016-02/msg00098.html (9,182 bytes)

354. Re: [RFI] RFI cured with 1/4 wave wire (score: 1)
Author: Cortland Richmond <ka5s@earthlink.net>
Date: Sun, 21 Feb 2016 08:00:32 -0500
On 2/20/2016 10:29 PM, Jim Brown wrote (in replying; single bar) : Can I attach my radial system (which I would disconnect from the copper pipe driven into the ground) to my L-network coupler and ISO
/archives//html/RFI/2016-02/msg00111.html (10,083 bytes)

355. Re: [RFI] Topband: Tecsun 660 (score: 1)
Author: Cortland Richmond <ka5s@earthlink.net>
Date: Tue, 8 Mar 2016 16:46:31 -0500
On 3/8/2016 4:19 PM, Hare, Ed W1RFI wrote: I can't imagine this reliably working well. If noise gets onto long, overhead power lines, it will radiate for a long distance. The noise radiated by lines
/archives//html/RFI/2016-03/msg00008.html (8,912 bytes)

356. Re: [RFI] Topband: Tecsun 660 (score: 1)
Author: Cortland Richmond <ka5s@earthlink.net>
Date: Sun, 13 Mar 2016 08:29:36 -0400
I had a post-military (comms and avionics) second career of ~30 years in EMC engineering, and found a small untuned loop works well on some hand held radios, not so well on others. Loops like the one
/archives//html/RFI/2016-03/msg00014.html (8,884 bytes)

357. Re: [RFI] Topband: Tecsun 660 (score: 1)
Author: Cortland Richmond <ka5s@earthlink.net>
Date: Mon, 14 Mar 2016 05:06:54 -0400
It's been years since I tested mine before it died but as I recall, it was quite sensitive in the HF range if you use a 50 ohm signal generator. A short whip is something like 10,000 ohms of impedanc
/archives//html/RFI/2016-03/msg00025.html (8,929 bytes)

358. Re: [RFI] House Ground (score: 1)
Author: Cortland Richmond <ka5s@earthlink.net>
Date: Wed, 16 Mar 2016 12:13:29 -0400
On 3/16/2016 2:24 AM, Robert Nobis wrote: Many modern, small profile, PCs have a built in power supply (switching) and are connected to the AC mains with a two wire cord/plug, without a green wire. M
/archives//html/RFI/2016-03/msg00052.html (9,303 bytes)

359. Re: [RFI] House Ground (score: 1)
Author: Cortland Richmond <ka5s@earthlink.net>
Date: Wed, 16 Mar 2016 13:32:01 -0400
On 3/16/2016 12:55 PM, Robert Nobis wrote: it is not totally clear to me how one could realistically insulate (or isolate) the various I/O lines from such computers. For example USB ports or audio in
/archives//html/RFI/2016-03/msg00058.html (8,963 bytes)

360. Re: [RFI] House Ground (score: 1)
Author: Cortland Richmond <ka5s@earthlink.net>
Date: Wed, 16 Mar 2016 13:40:09 -0400
On 3/16/2016 1:01 PM, dalej wrote: All the Apple products I've owned since 1988 never had an issue with RFI from any of them. Yes indeed -- but we know the kind of people who make sure they at least
/archives//html/RFI/2016-03/msg00059.html (8,942 bytes)

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