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Total 22 documents matching your query.

1. [RFI] Identification help (score: 1)
Author: "Dan Zimmerman N3OX" <n3ox@n3ox.net>
Date: Wed, 29 Nov 2006 21:46:12 -0500
I have a strange source of very strong interference, especially on 80m, but I've heard it at least on 40m and 17m as well. I haven't quite figured out the pattern in frequency where it's worst, but b
/archives//html/RFI/2006-11/msg00080.html (7,073 bytes)

2. Re: [RFI] RFI/EMI MAJOR Problems (score: 1)
Author: "Dan Zimmerman N3OX" <n3ox@n3ox.net>
Date: Wed, 29 Nov 2006 23:34:31 -0500
Is that it? If so, you need 1/4 wave radials for each band you're interested in to provide a low impedance place for the RF to flow. Otherwise, all of your "grounds," which should just be static/saf
/archives//html/RFI/2006-11/msg00083.html (8,259 bytes)

3. Re: [RFI] Philips Energy Saving Bulbs? (score: 1)
Author: "Dan Zimmerman N3OX" <n3ox@n3ox.net>
Date: Mon, 4 Dec 2006 09:51:14 -0500
I can hear them with a small AM receiver a foot from the lamp, but I haven't noticed otherwise. I can run some tests; I don't think I've got the same brand, but the whole house is energy-efficient li
/archives//html/RFI/2006-12/msg00007.html (7,250 bytes)

4. [RFI] MFJ-1026 Sense Antenna Strategy (score: 1)
Author: "Dan Zimmerman N3OX" <n3ox@n3ox.net>
Date: Wed, 31 Jan 2007 06:15:41 -0500
I've got a noise coming from a (somewhat) nearby apartment building on 80m that I'd like to null with my new MFJ-1026. It seems, though, that everything I try to null the noise also nulls signals fro
/archives//html/RFI/2007-01/msg00037.html (7,649 bytes)

5. Re: [RFI] Noise is everywhere (was Solar Arrays) (score: 1)
Author: "Dan Zimmerman N3OX" <n3ox@n3ox.net>
Date: Thu, 10 May 2007 09:41:17 -0400
This is the scariest part of the whole thing. The noise floor just goes up and up. Still, after operating from the actual suburbs and an apartment complex for the last six years, I would be happy to
/archives//html/RFI/2007-05/msg00010.html (8,303 bytes)

6. [RFI] Exasperating noise ID (score: 1)
Author: "Dan Zimmerman N3OX" <n3ox@n3ox.net>
Date: Mon, 3 Sep 2007 22:57:06 -0400
Just started thinking about 160m again for the season and THIS started up: Recordings in LSB mode, AGC on, 2.3kHz SSB filter: http://www.n3ox.net/files/1830_160noise_090307.mp3 http://www.n3ox.net/fi
/archives//html/RFI/2007-09/msg00003.html (8,878 bytes)

7. Re: [RFI] Exasperating noise ID (score: 1)
Author: "Dan Zimmerman N3OX" <n3ox@n3ox.net>
Date: Mon, 3 Sep 2007 23:49:55 -0400
John, Good comments and probably a very good lead-in to communications with the owners... Dan _______________________________________________ RFI mailing list RFI@contesting.com http://lists.contesti
/archives//html/RFI/2007-09/msg00005.html (6,728 bytes)

8. Re: [RFI] CFL bulbs - NO WAY (score: 1)
Author: "Dan Zimmerman N3OX" <n3ox@n3ox.net>
Date: Fri, 19 Oct 2007 11:44:04 -0400
Possibly true of anyone here who's not a climate scientist and is talking about Al Gore, conservation, hybrid cars, CFLs, cradle to grave energy costs of various lighting sources.... and all in a fo
/archives//html/RFI/2007-10/msg00086.html (9,751 bytes)

9. [RFI] Might be of interest to the list... (score: 1)
Author: "Dan Zimmerman N3OX" <n3ox@n3ox.net>
Date: Sat, 20 Oct 2007 10:53:29 -0400
http://www.topix.com/forum/news/global-warming _______________________________________________ RFI mailing list RFI@contesting.com http://lists.contesting.com/mailman/listinfo/rfi
/archives//html/RFI/2007-10/msg00100.html (6,277 bytes)

10. Re: [RFI] Testing & Comparing Compact Fluorescents? (score: 1)
Author: "Dan Zimmerman N3OX" <n3ox@n3ox.net>
Date: Wed, 31 Oct 2007 10:10:36 -0400
Was that with the radio very near the bulb? Well, I know you didn't get your 160m totals by letting even a whiff of interference in anywhere near your house ;-) I think for the slightly more casual
/archives//html/RFI/2007-10/msg00145.html (9,819 bytes)

11. Re: [RFI] Testing & Comparing Compact Fluorescents? (score: 1)
Author: "Dan Zimmerman N3OX" <n3ox@n3ox.net>
Date: Wed, 31 Oct 2007 13:01:57 -0400
You just need Faraday lampshades with AC line filters where the line passes through ;-) I'm jealous. I wish I could improve my noise situation by doing something inside my house but my noise doesn't
/archives//html/RFI/2007-10/msg00152.html (8,320 bytes)

12. Re: [RFI] Cellphone-Jammer Fad - Harmful to Ham Radio? (score: 1)
Author: "Dan Zimmerman N3OX" <n3ox@n3ox.net>
Date: Sun, 4 Nov 2007 23:32:20 -0500
Very unlikely that a battery operated jamming device would be any more broadband than necessary. _______________________________________________ RFI mailing list RFI@contesting.com http://lists.cont
/archives//html/RFI/2007-11/msg00001.html (6,711 bytes)

13. Re: [RFI] impulsive RFI (score: 1)
Author: "Dan Zimmerman N3OX" <n3ox@n3ox.net>
Date: Mon, 3 Mar 2008 18:37:53 -0500
(So a Pringles can an be Good demonstration of the difference between a waveguide above cutoff vs. a waveguide below cutoff ;-) _______________________________________________ RFI mailing list RFI@co
/archives//html/RFI/2008-03/msg00009.html (6,939 bytes)

14. [RFI] False Alarm (score: 1)
Author: "Dan Zimmerman N3OX" <n3ox@n3ox.net>
Date: Sat, 27 Sep 2008 16:59:00 -0400
I was out trying to locate some arcing on my 20/17m relay switched Moxon, which became noisy on 17m recently. I built W1TRC's ultrasound listening device about a year ago to try to help me track down
/archives//html/RFI/2008-09/msg00047.html (8,322 bytes)

15. Re: [RFI] DTV and Power line RFI (score: 1)
Author: "Dan Zimmerman N3OX" <n3ox@n3ox.net>
Date: Mon, 6 Oct 2008 22:12:33 -0400
Well Mike, I'll keep an ear on those lines for you ;-) _______________________________________________ RFI mailing list RFI@contesting.com http://lists.contesting.com/mailman/listinfo/rfi
/archives//html/RFI/2008-10/msg00026.html (7,863 bytes)

16. Re: [RFI] Powerline Bandwidth Characteristics (score: 1)
Author: "Dan Zimmerman N3OX" <n3ox@n3ox.net>
Date: Sun, 12 Oct 2008 13:14:46 -0400
Greg, I think "narrowband" sources that have lots of 60Hz and harmonics in them might be things like light dimmers and switching power supplies that operate at a higher carrier frequency. Let's say
/archives//html/RFI/2008-10/msg00045.html (9,262 bytes)

17. Re: [RFI] Powerline Bandwidth Characteristics (score: 1)
Author: "Dan Zimmerman N3OX" <n3ox@n3ox.net>
Date: Sun, 12 Oct 2008 14:23:01 -0400
OK, here's a picture of what happens on 160m when a 10kHz square wave source is modulated with a 60Hz filtered square wave (Don't worry about the filtering, I thought it was necessary, the picture i
/archives//html/RFI/2008-10/msg00046.html (8,824 bytes)

18. Re: [RFI] Low RFI HDTV (score: 1)
Author: "Dan Zimmerman N3OX" <n3ox@n3ox.net>
Date: Sun, 28 Dec 2008 22:22:20 -0500
away in favor of LCD and eventually LED technology. Going away in the long run?? Maybe. But my uncle just bought a new plasma TV last week when his DLP TV gave it up. He's not fond of LCD because of
/archives//html/RFI/2008-12/msg00084.html (8,083 bytes)

19. Re: [RFI] Low RFI HDTV (score: 1)
Author: "Dan Zimmerman N3OX" <n3ox@n3ox.net>
Date: Sun, 28 Dec 2008 22:22:59 -0500
Oh, and by the way, all consumer electronics are hostile to ham radio until proven innocent ;-) 73 Dan _______________________________________________ RFI mailing list RFI@contesting.com http://lists
/archives//html/RFI/2008-12/msg00085.html (7,991 bytes)

20. Re: [RFI] CFL's & UV - Hoax or Real? Real but Overstated? (score: 1)
Author: Dan Zimmerman N3OX <n3ox@n3ox.net>
Date: Mon, 23 Feb 2009 21:36:16 -0500
Well, I'm not going to watch a video, but here's a link to the FDA's page of information on CFLs: http://www.fda.gov/CDRH/radhealth/products/cfl.html " Do CFLs emit UV? All fluorescent lamps emit som
/archives//html/RFI/2009-02/msg00109.html (8,297 bytes)

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