Search String: Display: Description: Sort:

Results:

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

Total 336 documents matching your query.

221. Re: [RFI] 20 Meter Noise Level (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Fri, 13 Mar 2009 14:00:59 -0400
Nah - you just run a cliplead between the aluminum foil around the TV and the aluminium foil hat you're wearing. 73, Pete N4ZR _______________________________________________ RFI mailing list RFI@con
/archives//html/RFI/2009-03/msg00043.html (8,661 bytes)

222. [RFI] 160M incoming RFI (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Fri, 13 Mar 2009 15:19:37 -0400
I have a very perplexing RF noise on 160M, which started a couple of weeks ago. It takes the form of a broad increase in the noise floor from about 1805 to 1825. On AM, CW and SSB it occurs with what
/archives//html/RFI/2009-03/msg00047.html (7,665 bytes)

223. Re: [RFI] Coaxial Choke (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Wed, 15 Apr 2009 17:14:33 -0400
I suspect, but don't know, that your results would be substantially the same with no balun at all. This whole current balun thing is a relatively recent phenomenon, and for 40-odd years most of us ne
/archives//html/RFI/2009-04/msg00052.html (13,106 bytes)

224. Re: [RFI] ATT U-Verse RFI issues??? (score: 1)
Author: Pete Smith N4ZR <n4zr@contesting.com>
Date: Tue, 21 Jul 2009 05:48:10 -0400
Judging by our local power company's practice, working on the HV does not require turning off the neighborhood. Sometimes they can shut down the offending leg, or if that won't work, what they do ins
/archives//html/RFI/2009-07/msg00022.html (9,796 bytes)

225. Re: [RFI] RF quiet UPS? (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Wed, 28 Oct 2009 16:45:13 -0400
Seems to me that needs may vary. For me, the most common scenario is the quick (usually squirrel-induced) dips that do nothing but cause my computers to reboot. I ran a 350VA UPS for years here to me
/archives//html/RFI/2009-10/msg00048.html (7,974 bytes)

226. [RFI] New switching wallwarts - RFI potential? (score: 1)
Author: Pete Smith N4ZR <n4zr@contesting.com>
Date: Tue, 12 Jan 2010 10:36:14 -0500
Recently, I have begun receiving a new type of wall-wart with various pieces of consumer equipment and, most recently, with my QS1R SDR. Ones I've seen have generally been for 5 volts at 1 amp, are m
/archives//html/RFI/2010-01/msg00039.html (8,078 bytes)

227. Re: [RFI] Working with the Power Company (was: Privileged treatment) (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Thu, 11 Feb 2010 05:44:00 -0500
You asked for success stories. Several years ago I was increasingly troubled by power line interference. I located a particularly bad case on a lightning interrupter at the corner of my lot, and file
/archives//html/RFI/2010-02/msg00041.html (11,372 bytes)

228. Re: [RFI] What the ARRL has power line noise? (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Thu, 11 Feb 2010 21:46:34 -0500
Not sure I understand your last sentence, Mike. 73, Pete N4ZR Visit the Contesting Compendium at http://wiki.contesting.com The World Contest Station Database, updated daily at www.conteststations.co
/archives//html/RFI/2010-02/msg00051.html (10,043 bytes)

229. Re: [RFI] Working with the Power Company (was: Privileged treatment) (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Fri, 12 Feb 2010 05:27:15 -0500
I totally agree on the 800 numbers - the other day when our cable was down, the phones were being answered in the Philippines. Snow? What's that? 73, Pete N4ZR Visit the Contesting Compendium at http
/archives//html/RFI/2010-02/msg00052.html (10,968 bytes)

230. Re: [RFI] Inbound RFI - strange source affecting 160 and 80 (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Mon, 22 Feb 2010 05:54:50 -0500
I have something similar that I can now see with some new software and my QS1R - only mine are ~80 KHz apart, peaking about 2.2 MHz, and are broad. I'd be glad to provide spectrum scope pictures to a
/archives//html/RFI/2010-02/msg00111.html (13,739 bytes)

231. [RFI] Surge Suppressors and EMI (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Thu, 18 Mar 2010 07:23:27 -0400
Has anyone explored the EMI suppression capabilities of the Staples Model 16949 Surge Protector? The spec sheet promises "150 KHz -100 MHz, up to 58 dB." Of course the "up to" renders the spec meanin
/archives//html/RFI/2010-03/msg00072.html (6,935 bytes)

232. [RFI] Replacing EMI components in a computer power supply (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Mon, 22 Mar 2010 10:39:53 -0400
The supply appears to have places for two toroidal inductors and a shunt capacitor on the input side. Would it make sense to try to find and install these pieces, or am I better off just buying and i
/archives//html/RFI/2010-03/msg00085.html (7,030 bytes)

233. [RFI] Lessons learned re computer RFI (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Fri, 26 Mar 2010 17:10:51 -0400
I bought a Qualtek 857-06/48 from Mouser (common and differential mode), figuring that it would fit in place of the filter-less IEC connector on the power supply. It didn't, so I took out my Dremel t
/archives//html/RFI/2010-03/msg00099.html (7,485 bytes)

234. [RFI] Surge suppressor distance from panel (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Sun, 11 Apr 2010 11:13:10 -0400
I just ran across something I'd never seen before in the specs for a surge suppressor (brand not important). It said "DO NOT install this device if there is not at least 10 meters (30 feet) or more o
/archives//html/RFI/2010-04/msg00031.html (6,973 bytes)

235. Re: [RFI] Surge suppressor distance from panel (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Sun, 11 Apr 2010 12:43:31 -0400
It is Staples house brand, UL listed. 73, Pete N4ZR The World Contest Station Database, updated daily at www.conteststations.com The Reverse Beacon Network at http://reversebeacon.net, blog at revers
/archives//html/RFI/2010-04/msg00034.html (8,603 bytes)

236. [RFI] Sudden Computer Racket (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Fri, 25 Jun 2010 07:31:13 -0400
Yesterday afternoon I suddenly experienced a violent increase in the noise on my receiver. Looking with a spectrum analyzer program and a broadband SDR, I can see that the noise consists of peaks at
/archives//html/RFI/2010-06/msg00028.html (8,040 bytes)

237. Re: [RFI] Sudden Computer Racket (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Fri, 25 Jun 2010 14:31:23 -0400
Well, Jim wins the prize - it was the sound card, even with no cables attached. Fortunately, it wasn't very expensive, so in the wastebasket it goes. Thanks, everyone. 73, Pete N4ZR The World Contest
/archives//html/RFI/2010-06/msg00031.html (8,207 bytes)

238. Re: [TowerTalk] metal-on-metal interference (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Sat, 24 Jul 2010 07:25:05 -0400
For sure - I had terrible line noise a few years ago that was traced to a lightning arrestor on top of a nearby pole. Seems a woodpecker had undermined one of the two lag bolts - it had come loose an
/archives//html/RFI/2010-07/msg00024.html (9,963 bytes)

239. Re: [RFI] Bad QRN on HF (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Sun, 15 Aug 2010 09:22:29 -0400
Considering what 20M sounded like here last night, I would agree - certainly it is not unusual for propagation to carry thunderstorm noise thousands of miles. 73, Pete N4ZR The World Contest Station
/archives//html/RFI/2010-08/msg00019.html (9,928 bytes)

240. Re: [RFI] Am I hosed? RFI problems (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Mon, 16 Aug 2010 08:20:45 -0400
One very useful tool is a software-defined receiver and the associated spectrum display software. for example, I was troubled with an audible increase in the noise floor at the bottom end of 160. The
/archives//html/RFI/2010-08/msg00030.html (15,917 bytes)

Current List: 221 - 240
Page: [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17]
This search system is powered by Namazu