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References: [ +from:cw_de_n5op@sbcglobal.net: 103 ]

Total 103 documents matching your query.

1. [RFI] Power Line Noise (score: 1)
Author: Kimberly Elmore <cw_de_n5op@sbcglobal.net>
Date: Thu, 25 Feb 2010 13:00:34 -0800 (PST)
K3LR suggested that I submit this here because there are a lot of you that know a lot more about this than I do. So, here goes: Recently, I've noticed some pretty severe, intermittent power linenoise
/archives//html/RFI/2010-02/msg00112.html (9,779 bytes)

2. Re: [RFI] Power Line Noise (score: 1)
Author: Kimberly Elmore <cw_de_n5op@sbcglobal.net>
Date: Thu, 25 Feb 2010 14:42:21 -0800 (PST)
I took a side trip and found that the pole belongs to the Oklahoma Electric Cooperative (OEC) and is pole number 31W19-4. It is currently not generating any noise, but that's only a temporary conditi
/archives//html/RFI/2010-02/msg00114.html (7,767 bytes)

3. [RFI] More on Power Line Noise (score: 1)
Author: Kim Elmore <cw_de_n5op@sbcglobal.net>
Date: Sun, 28 Feb 2010 10:22:04 -0600
After having convinced myself that I had found The Culprit, located 1/2 mi east of me, responsible for my recent increase in power line QRN. I'm now not so sure. I've driven past that point several t
/archives//html/RFI/2010-02/msg00118.html (8,201 bytes)

4. Re: [RFI] Ferrite bead disintegration (score: 1)
Author: Kimberly Elmore <cw_de_n5op@sbcglobal.net>
Date: Mon, 23 Aug 2010 08:57:07 -0700 (PDT)
Could they have been immersed (more or less) in water then exposed to freezing? That could have imposed enough stress. Also, as long as the pieces of the beads themselves remain held together, they w
/archives//html/RFI/2010-08/msg00058.html (10,214 bytes)

5. Re: [RFI] Ferrite bead disintegration (score: 1)
Author: Kim Elmore <cw_de_n5op@sbcglobal.net>
Date: Mon, 23 Aug 2010 21:37:38 -0500
Lightning will most certainly do that! I had a strike that blew up the beads on a 1:1 balun on my F12 Sigma 80. It also vaporized the center conductor of the transmission line within the balun. If yo
/archives//html/RFI/2010-08/msg00065.html (8,598 bytes)

6. Re: [RFI] Ferrite bead disintegration (score: 1)
Author: Kimberly Elmore <cw_de_n5op@sbcglobal.net>
Date: Wed, 25 Aug 2010 14:57:41 -0700 (PDT)
Good point and one I was ignorant of! Kim Elmore, N5OP The performance of split beads is very sensitive to the length of the air gap between the faces, which is why the faces are so highly polished a
/archives//html/RFI/2010-08/msg00074.html (13,360 bytes)

7. [RFI] Power Line Noise Conundrum (score: 1)
Author: Kim Elmore <cw_de_n5op@sbcglobal.net>
Date: Sat, 09 Oct 2010 13:39:20 -0500
I have a recurring power line RFI issue. At one point, it seemed to have been remedied, but has returned. It sounds similar to what I had earlier in the spring. That was repaired by the power company
/archives//html/RFI/2010-10/msg00021.html (8,388 bytes)

8. [RFI] POwer line noise (cont) (score: 1)
Author: Kim Elmore <cw_de_n5op@sbcglobal.net>
Date: Mon, 11 Oct 2010 07:20:00 -0500
After a night of rain, we have a foggy morning. I was expecting quiet on the bands. but absolutely NOTHING has changed! I still have 120 Hz power line noise of S9 + 20 dB on 40 M in AM mode with 6 kH
/archives//html/RFI/2010-10/msg00029.html (6,465 bytes)

9. [RFI] Alternative Noise Sources? (score: 1)
Author: Kimberly Elmore <cw_de_n5op@sbcglobal.net>
Date: Tue, 12 Oct 2010 06:32:33 -0700 (PDT)
Ever since I became aware of the new noise source somewhere near my QTH, I've been driving around, looking for it. Every morning, I leave home early and drive along the main roads where two different
/archives//html/RFI/2010-10/msg00033.html (7,483 bytes)

10. [RFI] Power Line RFI... Solved (I think) (score: 1)
Author: Kim Elmore <cw_de_n5op@sbcglobal.net>
Date: Tue, 12 Oct 2010 21:26:00 -0500
I appreciate all the advice you've all given -- it has been very informative. With all of that said, I must admit that I think I wound up solving the problem quite unintentionally. In fact, I have to
/archives//html/RFI/2010-10/msg00036.html (7,664 bytes)

11. Re: [RFI] Actually an AFI Question ... (score: 1)
Author: Kim Elmore <cw_de_n5op@sbcglobal.net>
Date: Thu, 03 Feb 2011 21:18:45 -0600
About the only way you can manage that in a straightforward manor is with good, old-fashioned AM. Or, alternatively, a two-tone input to an SSB transmitter. Both with plenty of power. But this does r
/archives//html/RFI/2011-02/msg00030.html (12,610 bytes)

12. Re: [RFI] RFI free UPS (score: 1)
Author: Kim Elmore <cw_de_n5op@sbcglobal.net>
Date: Tue, 28 Jun 2011 21:43:16 -0500
I have an older CyberPower Systems 1200 kVA UPS that includes comms to the computer. I've never heard a peep out of it, much less any hash. Kim N5OP _______________________________________________ RF
/archives//html/RFI/2011-06/msg00033.html (7,817 bytes)

13. Re: [RFI] Smart meters (score: 1)
Author: Kim Elmore <cw_de_n5op@sbcglobal.net>
Date: Sun, 15 Jan 2012 12:38:29 -0600
Oklahoma Gas and Electric installed smart meters in my city as an initial experimental tryout. I can run about a kW (peak) output. Mine works fine, causes me no interference and I don't bother it. No
/archives//html/RFI/2012-01/msg00020.html (9,137 bytes)

14. Re: [RFI] Interference (score: 1)
Author: Kim Elmore <cw_de_n5op@sbcglobal.net>
Date: Tue, 17 Jan 2012 18:50:04 -0600
Is the intermittent nature random or is it periodic? If it's periodic it *might* be a doorbell transformer. Big maybe. Kim N5OP _______________________________________________ RFI mailing list RFI@co
/archives//html/RFI/2012-01/msg00063.html (10,225 bytes)

15. Re: [RFI] Is a low pass filter necessary? (score: 1)
Author: Kim Elmore <cw_de_n5op@sbcglobal.net>
Date: Thu, 10 May 2012 22:52:38 -0500
Even though I know that modern rigs don't need one and that modern amplifiers don't need one and that VHF TV is dead as a door nail (or is that coffin nail?), I anachronistically use one. The inserti
/archives//html/RFI/2012-05/msg00012.html (7,936 bytes)

16. Re: [RFI] Lightning Protection (score: 1)
Author: Kim Elmore <cw_de_n5op@sbcglobal.net>
Date: Sun, 01 Jul 2012 22:39:41 -0500
I'm a research meteorologist at the National Severe Storms Laboratory and work with both Dave Rust and Don MacGorman, both lightning physicists there. I asked them about these corona brushes and was
/archives//html/RFI/2012-07/msg00016.html (8,180 bytes)

17. Re: [RFI] Lightning Protection (score: 1)
Author: Kim Elmore <cw_de_n5op@sbcglobal.net>
Date: Mon, 2 Jul 2012 08:08:39 -0500
No, not effective. Again, because *everything else* is in corona (tower legs, rivets, weld sputters, bolt threads, nut shoulders, joints of all kinds) and because lightning propagation isn't driven b
/archives//html/RFI/2012-07/msg00021.html (9,293 bytes)

18. Re: [RFI] Samsung refrigerator RFI (score: 1)
Author: Kim Elmore <cw_de_n5op@sbcglobal.net>
Date: Wed, 08 Aug 2012 22:13:52 -0500
I guess I'm lucky: I have an LG front-loading washer and gas dryer, along with an LG refrigerator and a Sears dishwasher (which is made by, I think, Bosch) and I have never heard any of them. And, I
/archives//html/RFI/2012-08/msg00049.html (8,425 bytes)

19. [RFI] HDTV: Plasma vs LCD (score: 1)
Author: Kimberly Elmore <cw_de_n5op@sbcglobal.net>
Date: Thu, 20 Dec 2012 14:44:13 -0800 (PST)
I've read many reports if severe RFI from plasma TVs. It's about time for us to upgrade form our old NTSC Sony to something better. The plasma screens seem to be less expensive for a given picture qu
/archives//html/RFI/2012-12/msg00076.html (7,222 bytes)

20. Re: [RFI] HDTV: Plasma vs LCD (score: 1)
Author: Kim Elmore <cw_de_n5op@sbcglobal.net>
Date: Mon, 24 Dec 2012 11:57:41 -0600
Thanks to all that took time to respond! I made my choice and it wasn't plasma! A 47" 1080p LCD/LED Panasonic. It should prove a big step up from our current Sony CRT NTSC unit. 73 & MX, Kim N5OP ___
/archives//html/RFI/2012-12/msg00113.html (8,392 bytes)


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