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Total 236 documents matching your query.

1. [RFI] 160 meters RFI reduction using RF Choke on neighbors TV power cord (score: 1)
Author: Don Kirk <wd8dsb@gmail.com>
Date: Thu, 5 Dec 2013 21:28:23 -0500
I was asked to post the following info on rfi@contesting.com which I had also posted earlier today on the topband@contesting.com, so here it is. Within the last few months I noticed a raspy signal on
/archives//html/RFI/2013-12/msg00060.html (8,642 bytes)

2. Re: [RFI] Display for SDR-IQ (score: 1)
Author: Don Kirk <wd8dsb@gmail.com>
Date: Wed, 29 Jan 2014 15:48:24 -0500
Roger, Not sure what kind of scope functionality you are looking for (just audio or rf???). On my laptop I use a program called sound card scope and it allows you to capture audio waveforms. You can
/archives//html/RFI/2014-01/msg00020.html (7,663 bytes)

3. Re: [RFI] LED Bulbs (score: 1)
Author: Don Kirk <wd8dsb@gmail.com>
Date: Fri, 14 Feb 2014 06:56:17 -0500
"Making friendships with our neighbors and helping them with their electronics problems might get us further towards resolution than becoming a RF community organizer stirring up protests and ill fee
/archives//html/RFI/2014-02/msg00096.html (8,692 bytes)

4. Re: [RFI] ARRL to FCC... (score: 1)
Author: Don Kirk <wd8dsb@gmail.com>
Date: Wed, 26 Mar 2014 20:00:35 -0400
Hi Tom, I'm the one that reported the 3 Samsung Plasma TV cases to Ed and the ARRL, and in all cases the common mode chokes were the same (14 turns of a power cord on a 2.4" OD Fair-Rite #31 mix toro
/archives//html/RFI/2014-03/msg00207.html (25,039 bytes)

5. Re: [RFI] Keurig coffee vs Astron Rs35M (score: 1)
Author: Don Kirk <wd8dsb@gmail.com>
Date: Thu, 10 Apr 2014 10:06:14 -0400
We have a Keurig single cup coffee maker (MODEL B145) at work and it's a very high current device (1500 watt rating which would be 12.5 amps). On a 15 amp outlet circuit that typically uses 14 gauge
/archives//html/RFI/2014-04/msg00077.html (10,104 bytes)

6. Re: [RFI] FCC contact? (score: 1)
Author: Don Kirk <wd8dsb@gmail.com>
Date: Sun, 11 May 2014 19:35:00 -0400
Hi Ken, I think you need to take a step back. No matter were you look you will find sources of interference. The question is what source of interference is causing your problem. Therefore the first q
/archives//html/RFI/2014-05/msg00036.html (10,746 bytes)

7. Re: [RFI] Utility coming tomorrow to chase RFI (score: 1)
Author: Don Kirk <wd8dsb@gmail.com>
Date: Wed, 4 Jun 2014 12:11:51 -0400
"then it probably isn't noise from an arc on a power line" Power line arcing is often easy to identify by viewing the AM radio audio output on a scope (you typically see spikes at 120 hertz indicatin
/archives//html/RFI/2014-06/msg00025.html (8,416 bytes)

8. Re: [RFI] Utility coming tomorrow to chase RFI (score: 1)
Author: Don Kirk <wd8dsb@gmail.com>
Date: Fri, 6 Jun 2014 09:17:20 -0400
HI Paul, Here is a link to a youtube recording of what I hear on 136 MHZ AM using a small handheld scanner (Radio Shack Pro-94) that has the AM aircraft band when listening to power line noise (in th
/archives//html/RFI/2014-06/msg00040.html (12,213 bytes)

9. Re: [RFI] Utility coming tomorrow to chase RFI (score: 1)
Author: Don Kirk <wd8dsb@gmail.com>
Date: Fri, 6 Jun 2014 09:27:33 -0400
I previously said "Here is a link to a youtube recording of what I hear on 136 MHZ AM using a small handheld scanner (Radio Shack Pro-94)" By the way if you look at the audio waveform of the noise in
/archives//html/RFI/2014-06/msg00041.html (10,509 bytes)

10. Re: [RFI] Recommended Handheld VHF-UHF Yagi? (score: 1)
Author: Don Kirk <wd8dsb@gmail.com>
Date: Tue, 17 Jun 2014 08:14:15 -0400
Hi David, For power line noise direction finding I use a portable 4 element yagi for use on 136 MHZ AM (I don't currently have AM RX capabilities on UHF). If I had UHF capabilities I would use both a
/archives//html/RFI/2014-06/msg00101.html (10,248 bytes)

11. Re: [RFI] Recommended Handheld VHF-UHF Yagi? (score: 1)
Author: Don Kirk <wd8dsb@gmail.com>
Date: Tue, 17 Jun 2014 08:29:15 -0400
David, I should also mention that you might consider a small log periodic antenna that covers VHF and UHF, but don't know what's available (this would provide more frequency flexibility with just one
/archives//html/RFI/2014-06/msg00102.html (11,080 bytes)

12. Re: [RFI] Tecsun PL-660 for chasing RFI [Was: Is Icom IC-T90a AM-mode good for chasing RFI?] (score: 1)
Author: Don Kirk <wd8dsb@gmail.com>
Date: Tue, 23 Sep 2014 11:13:58 -0400
Cortland (KA5S) said "MY RFI hunting has almost all been with loops or yagis -- and by ear.", and my experience has been exactly the same. What's much more important than an S meter is the ability to
/archives//html/RFI/2014-09/msg00054.html (11,249 bytes)

13. [RFI] 160 meters RFI caused by low voltage bookcase lights (score: 1)
Author: Don Kirk <wd8dsb@gmail.com>
Date: Mon, 29 Sep 2014 13:25:21 -0400
Late last week I encountered interference on 160 meters which was repeating at 41 khz intervals, and this morning I was able to track the problem down to low voltage bookcase lights at my neighbors h
/archives//html/RFI/2014-09/msg00075.html (7,212 bytes)

14. Re: [RFI] 160 meters RFI caused by low voltage bookcase lights (score: 1)
Author: Don Kirk <wd8dsb@gmail.com>
Date: Wed, 1 Oct 2014 10:53:54 -0400
Hi Paul, My 4 turn shielded loop is very simple, and it's based on a design in the July 1977 issue of QST by W1FB (the article was called Beat the noise with a "scoop Loop". My 4 turn shield loop is
/archives//html/RFI/2014-10/msg00002.html (9,593 bytes)

15. [RFI] 160 meter boradband noise tracked down to apartment complex (score: 1)
Author: Don Kirk <wd8dsb@gmail.com>
Date: Fri, 24 Oct 2014 14:23:28 -0400
Recently noticed an increase in my noise level on 160 meters, and a about 3 weeks ago I tracked it down to a new apartment complex which is located 0.41 miles away. Today I noticed that the signal ha
/archives//html/RFI/2014-10/msg00043.html (8,803 bytes)

16. Re: [RFI] 160 meter boradband noise tracked down to apartment complex (score: 1)
Author: Don Kirk <wd8dsb@gmail.com>
Date: Fri, 24 Oct 2014 14:26:01 -0400
Oops, the link I provided in previous e-mail was for one of my videos associated with this case. The link to my website is : http://sites.google.com/site/broadbandrfi/ 73, Don (wd8dsb) ______________
/archives//html/RFI/2014-10/msg00044.html (9,194 bytes)

17. [RFI] Nintendo 3DS After Market Power Supply 160 meters RFI (score: 1)
Author: Don Kirk <wd8dsb@gmail.com>
Date: Tue, 11 Nov 2014 20:21:16 -0500
This past weekend I encountered interference on 160 meters that I tracked down to a neighbors Nintendo 3DS after market power supply. Full details can be found on a simple website I created to docume
/archives//html/RFI/2014-11/msg00010.html (6,815 bytes)

18. [RFI] Elimination of Treadmill RFI on 160 meters (score: 1)
Author: Don Kirk <wd8dsb@gmail.com>
Date: Thu, 8 Jan 2015 08:11:10 -0500
For many years my wife's treadmill caused strong interference on 160 meters when it was in use, and yesterday I was able to completely eliminate the RFI using a combination of two different filters.
/archives//html/RFI/2015-01/msg00015.html (6,904 bytes)

19. Re: [RFI] Elimination of Treadmill RFI on 160 meters (score: 1)
Author: Don Kirk <wd8dsb@gmail.com>
Date: Sat, 10 Jan 2015 02:49:37 -0500
Hi Chris, My picture was taken at a bad angle. I actually soldered the green wire coming from the treadmill (load side of the filter) to the case of the filter) as is the green wire on the line side
/archives//html/RFI/2015-01/msg00032.html (10,471 bytes)

20. Re: [RFI] RF getting into 4-port wirelss router. (score: 1)
Author: Don Kirk <wd8dsb@gmail.com>
Date: Mon, 12 Jan 2015 11:15:00 -0500
Hi Ken, May or may not be a related topic, but thought my following info might help you long term. I had been using a filter I built on my phone line that feeds my DSL modem (original filter design b
/archives//html/RFI/2015-01/msg00067.html (11,872 bytes)


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