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References: [ +from:n4zr@contesting.com: 336 ]

Total 336 documents matching your query.

241. [RFI] Ferrite bead disintegration (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Mon, 23 Aug 2010 09:10:57 -0400
I took apart a home-made 100 bead receiving-only common mode choke yesterday. As I peeled off the electrical tape I was surprised when each bead that came out of the wrapping disintegrated into dozen
/archives//html/RFI/2010-08/msg00055.html (7,732 bytes)

242. Re: [RFI] Ferrite bead disintegration (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Mon, 23 Aug 2010 10:12:27 -0400
They were lying in the grass, largely during the winter months, under no physical stress at all, unless sun heat might have been a factor due to the use of black vinyl electrical tape to wrap the bea
/archives//html/RFI/2010-08/msg00057.html (8,910 bytes)

243. Re: [RFI] Ferrite bead disintegration (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Tue, 24 Aug 2010 16:42:20 -0400
Not unless the lightning could find the choke on the cable rack in my garage. 73, Pete N4ZR The World Contest Station Database, updated daily at www.conteststations.com The Reverse Beacon Network at
/archives//html/RFI/2010-08/msg00066.html (9,790 bytes)

244. Re: [RFI] Ferrite bead disintegration (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Wed, 25 Aug 2010 05:40:24 -0400
Sure, but someone suggested that maybe my recent lightning strike had gotten it. When in use, it was lying on the ground at least 300 feet from my transmit antennas and tower. Also, winter is not lig
/archives//html/RFI/2010-08/msg00070.html (9,407 bytes)

245. Re: [RFI] Electric Dog Fences - What to Buy? (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Tue, 09 Nov 2010 11:45:37 -0500
Both we and our neighbors have been very satisfied with the Electronic Fence brand. The local franchisee is extremely professional, and the equipment is much better made than the stuff you can buy of
/archives//html/RFI/2010-11/msg00049.html (10,088 bytes)

246. Re: [RFI] RFI to TV (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Wed, 08 Dec 2010 11:37:28 -0500
John, have you carefully checked all your TV cabling, particularly the F connectors and splitters? I've had open shields that produced this sort of problem. 73, Pete N4ZR The World Contest Station Da
/archives//html/RFI/2010-12/msg00056.html (7,631 bytes)

247. Re: [RFI] RFI from Apple Airport Extreme (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Wed, 29 Dec 2010 17:17:10 -0500
Doesn't that suggest that you need common-mode choking on the antenna lead, and maybe some others, as K9YC suggested? 73, Pete N4ZR The World Contest Station Database, updated daily at www.conteststa
/archives//html/RFI/2010-12/msg00161.html (8,201 bytes)

248. Re: [RFI] Radiant floor heating (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Mon, 03 Jan 2011 15:45:34 -0500
Well, we are within days of embarking on a bathroom remodeling featuring a heated floor. I've looked at the thermostat/control units, and considering that they go in a standard single-gang outlet box
/archives//html/RFI/2011-01/msg00044.html (9,719 bytes)

249. [RFI] mystery noise (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Wed, 12 Jan 2011 14:50:17 -0500
I have a small active vertical for my QS1R receiver, mounted on my garage roof. Using the QS1R's panadaptor display, I can see that I have recurrent broad, strong noise sources every 54 KHz. When lis
/archives//html/RFI/2011-01/msg00108.html (7,301 bytes)

250. Re: [RFI] mystery noise (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Thu, 13 Jan 2011 06:33:02 -0500
I'm sure you guys are probably right about the switcher. I should have mentioned that the active antenna is perhaps 100 feet from my shack, and that I have a 10-turn coax choke on the feedline right
/archives//html/RFI/2011-01/msg00114.html (9,631 bytes)

251. [RFI] Revision of Part 15 (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Thu, 13 Jan 2011 16:38:03 -0500
-- 73, Pete N4ZR The World Contest Station Database, updated daily at www.conteststations.com The Reverse Beacon Network at http://reversebeacon.net, blog at reversebeacon.blogspot.com, spots at teln
/archives//html/RFI/2011-01/msg00124.html (6,531 bytes)

252. Re: [RFI] Gone then back (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Wed, 02 Feb 2011 08:16:26 -0500
Don't these sound a lot like simple inductors in series with the power going to the dimmer? I couldn't find the tech specs on the "lamp debuzzing coils", but... 73, Pete N4ZR The World Contest Statio
/archives//html/RFI/2011-02/msg00015.html (16,703 bytes)

253. Re: [RFI] Aquarium Heater (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Thu, 10 Feb 2011 10:14:26 -0500
OTOH, if the heater's thermostat is a standard thermo-mechanical type, you probably don't need to know all that. I tracked down a noise source a few years ago that turned to be an older, heated dog d
/archives//html/RFI/2011-02/msg00046.html (9,629 bytes)

254. Re: [RFI] Aquarium Heater (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Thu, 10 Feb 2011 11:45:43 -0500
Which many do, particularly with large and/or hunting dogs. It also provides water while outside in freezing weather, even if the dog comes in for the night. We have an outside cat who couldn't live
/archives//html/RFI/2011-02/msg00050.html (10,288 bytes)

255. Re: [RFI] Low voltage lighting solid state "transformers" (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Mon, 28 Mar 2011 10:52:55 -0400
Our new kitchen has 8 x 2-bulb Kichler halogen under-cabinet lights. Not a bit of noise, because the switching PSes are inside the metal cases, and perhaps because they are better designed to start w
/archives//html/RFI/2011-03/msg00103.html (9,220 bytes)

256. Re: [RFI] Possible Satellite Internet Interference (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Wed, 11 May 2011 12:07:00 -0400
Seems to me that the most important things to know would be how often this signal repeats, what the lowest frequency is on which it can be observed, and how high it extends. I'm betting on a switchin
/archives//html/RFI/2011-05/msg00054.html (9,395 bytes)

257. [RFI] Yet more wallwarts (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Mon, 20 Jun 2011 10:50:41 -0400
I just got done ordering three digital adapter boxes for the remaining analog TV sets in our house, a change required by Comcast's impending change to all-digital cable. Interestingly, they will rent
/archives//html/RFI/2011-06/msg00005.html (7,330 bytes)

258. [RFI] Video-card related severe RFI (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Mon, 08 Aug 2011 07:10:09 -0400
OK, here's a weird one - This weekend, I suddenly had severe RFI from 4 MHz to at least 21 MHz, which took the form of a buzz-saw noise with narrow, sharp peaks every 48 Hz. It was audible regardless
/archives//html/RFI/2011-08/msg00008.html (8,051 bytes)

259. Re: [RFI] Solar Panel RFI - Noise begins (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Sat, 20 Aug 2011 17:22:01 -0400
It might be more useful if you showed us a panoramic display with a wider band-spread, to see if there is a characteristic repetition every x KHz, or something similar. 73, Pete N4ZR The World Contes
/archives//html/RFI/2011-08/msg00021.html (8,333 bytes)

260. Re: [RFI] Signal or Noise on 14.200 (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Thu, 20 Oct 2011 07:52:01 -0400
Nor here, in West Virginia. I hope they fixed it. 73, Pete N4ZR The World Contest Station Database, updated daily at www.conteststations.com The Reverse Beacon Network at http://reversebeacon.net, bl
/archives//html/RFI/2011-10/msg00018.html (9,038 bytes)

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