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21. [RFI] How to proceed? (score: 1)
Author: N4ZR <n4zr@comcast.net>
Date: Sun, 26 Jan 2020 21:56:46 -0500
Recently, I have experienced constant S8 line noise on 160 meters.  I've killed the power in my house and run the radio on batteries, with no change, so it's nothing inside.  When I drive down the ro
/archives//html/RFI/2020-01/msg00138.html (8,242 bytes)

22. Re: [RFI] How to proceed? (score: 1)
Author: N4ZR <n4zr@comcast.net>
Date: Mon, 27 Jan 2020 15:38:34 -0500
But at least as I understand it, that's just as true for arcing powerline equipment as for any connected RFI generator. 73, Pete N4ZR Check out the Reverse Beacon Network at <http://reversebeacon.net
/archives//html/RFI/2020-01/msg00151.html (11,231 bytes)

23. [RFI] AM Broadcast Intermod? (score: 1)
Author: N4ZR <n4zr@comcast.net>
Date: Tue, 28 Jan 2020 12:05:53 -0500
I'm embarrassed to admit that I had overlooked a noise-maker in my shack, my 1 TB USB disk drive.  I cleaned that up with a few turns of the DC power cable around a type 31 toroid, and now I've uncov
/archives//html/RFI/2020-01/msg00155.html (8,169 bytes)

24. Re: [RFI] SDR software that displays actual waveform of received signal???? (score: 1)
Author: N4ZR <n4zr@comcast.net>
Date: Mon, 3 Feb 2020 11:39:25 -0500
There's an app called SoundcardScope, available free on the net for non-commercial use,that may do what you want. 73, Pete N4ZR Check out the Reverse Beacon Network at <http://reversebeacon.net>, now
/archives//html/RFI/2020-02/msg00011.html (10,332 bytes)

25. [RFI] RFI from Seagate USB Disk Drive (score: 1)
Author: N4ZR <n4zr@comcast.net>
Date: Sat, 8 Feb 2020 20:37:32 -0500
Since there are probably a lot of those out there, I thought I'd report finding that my Seagate USB 3.0 2TB disk drive was a major source of broadband RFI 160-10 meters. Oddly, the problem wasn't wit
/archives//html/RFI/2020-02/msg00058.html (7,014 bytes)

26. Re: [RFI] Unbelievable (amazing) response time from utility company (score: 1)
Author: N4ZR <n4zr@comcast.net>
Date: Wed, 19 Feb 2020 11:35:26 -0500
I get pretty good service from BGE up here North of B'more, though the technician is learning on the job.  Regarding arcs disconnected from the power lines proper, my power company at my previous pla
/archives//html/RFI/2020-02/msg00094.html (14,800 bytes)

27. Re: [RFI] Afredi LAN-IQ SDR (score: 1)
Author: N4ZR <n4zr@comcast.net>
Date: Tue, 5 May 2020 10:33:23 -0400
Ah, that's a good point - my car has  a USB auxiliary port for audio, but I have no idea what current it can deliver, and the Afredi wants 900 ma.  Looks like a 24 watt Anker should meet that spec wi
/archives//html/RFI/2020-05/msg00019.html (9,508 bytes)

28. Re: [RFI] Noise centered around 20 meters (score: 1)
Author: N4ZR <n4zr@comcast.net>
Date: Tue, 26 May 2020 08:08:33 -0400
Amen, Scott.  A few years ago a whopping case of RFI at my house was traced to one of two bolts mounting a lightning arrester on a pole.  A woodpecker had undermined one of the bolts, causing it to g
/archives//html/RFI/2020-05/msg00108.html (11,279 bytes)

29. [RFI] "Marker RFI" (score: 1)
Author: N4ZR <n4zr@comcast.net>
Date: Sat, 22 Aug 2020 16:21:14 -0400
Here's an odd one.  I seem to have a new emitter in the neighborhood.  It puts out a broad, T7, rough-but-steady tone just below 50 KHz increments (7000, 7050, etc.) .  It is loudest on 40M - about S
/archives//html/RFI/2020-08/msg00020.html (7,259 bytes)

30. Re: [RFI] "Marker RFI" (score: 1)
Author: N4ZR <n4zr@comcast.net>
Date: Sun, 23 Aug 2020 09:05:20 -0400
Chuck and I hear these signals at 50-KHz spacing, more or less.  Another interesting data point: this morning, with 40 thoroughly closed (band noise at S1), the signal is not there.  It is fairly lou
/archives//html/RFI/2020-08/msg00025.html (9,710 bytes)

31. [RFI] USB RFI (score: 1)
Author: N4ZR <n4zr@comcast.net>
Date: Fri, 18 Dec 2020 11:44:17 -0500
I used to think that my station was pretty much free of RFI, but recently I have discovered that on 80 and 160, running full legal power, I am experiencing occasional interruption of USB connections
/archives//html/RFI/2020-12/msg00085.html (7,654 bytes)

32. Re: [RFI] Pole mounted lightning arresters? (score: 1)
Author: N4ZR <n4zr@comcast.net>
Date: Mon, 11 Jan 2021 14:35:50 -0500
Ah, takes me back.  A few years ago at my old semi-rural location I started having severe RFI.  Turned out to be a lightning arrestor on a pole behind my garage. but here's the fun part - the noise s
/archives//html/RFI/2021-01/msg00032.html (10,010 bytes)

33. Re: [RFI] Pole mounted lightning arresters? (score: 1)
Author: N4ZR <n4zr@comcast.net>
Date: Mon, 11 Jan 2021 19:18:16 -0500
From my experience, if it is an electric fence it will be on continuously, and the individual "ticks" will be very discrete. 73, Pete N4ZR Check out the new Reverse Beacon Network web server at <http
/archives//html/RFI/2021-01/msg00049.html (10,376 bytes)

34. Re: [RFI] Pole mounted lightning arresters? (score: 1)
Author: N4ZR <n4zr@comcast.net>
Date: Mon, 11 Jan 2021 22:15:49 -0500
Well, definitely not an electric fence.  Sounds like 120 Hz to me. 73, Pete N4ZR Check out the new Reverse Beacon Network web server at <http://beta.reversebeacon.net>. For spots, please use your fav
/archives//html/RFI/2021-01/msg00052.html (8,948 bytes)

35. Re: [RFI] Pole mounted lightning arresters? (score: 1)
Author: N4ZR <n4zr@comcast.net>
Date: Tue, 12 Jan 2021 10:36:47 -0500
Not likely - those buried fences (at least all that I've seen) operate at VLF, and no ticking. 73, Pete N4ZR Check out the new Reverse Beacon Network web server at <http://beta.reversebeacon.net>. Fo
/archives//html/RFI/2021-01/msg00057.html (10,418 bytes)

36. Re: [RFI] New RFI (score: 1)
Author: N4ZR <n4zr@comcast.net>
Date: Tue, 12 Jan 2021 16:22:31 -0500
I was a little surprised by Dave's strong advice against entering a home where RFI is located.  On two occasions at my former townhouse QTH, I discovered that the source of RFI was "clickless" light
/archives//html/RFI/2021-01/msg00064.html (14,965 bytes)

37. Re: [RFI] New RFI (score: 1)
Author: N4ZR <n4zr@comcast.net>
Date: Tue, 12 Jan 2021 16:25:59 -0500
Using a Moxon antenna is another way to get a sharper null - there was an article in QST describing such an antenna, which I use with a shirt-pocket handi-talkie with 136 MHz AM aircraft band.  The n
/archives//html/RFI/2021-01/msg00065.html (11,326 bytes)

38. [RFI] Misnamed/Hijacked was: Re: New Interference at kk0sd (score: 1)
Author: N4ZR <n4zr@comcast.net>
Date: Wed, 24 Mar 2021 10:25:30 -0400
This thread is a beautiful illustration of how useful information can get lost when a thread is hijacked.  Ed's very informative post about small loop DFing was hidden under "New interference at KK0S
/archives//html/RFI/2021-03/msg00108.html (41,473 bytes)

39. Re: [RFI] Raspberry PI / Wall wart RFI (score: 1)
Author: N4ZR <n4zr@comcast.net>
Date: Fri, 2 Apr 2021 22:30:39 -0400
Jameco has a bunch of 5 and 12-volt linear wall warts for quite reasonable prices.  For example, their 5V unregulated 800 ma wall wart is $3.90, and a 12V 2 amp unit is $13.95.  There are a lot in be
/archives//html/RFI/2021-04/msg00006.html (10,299 bytes)

40. [RFI] Mystery signal on 40M (score: 1)
Author: N4ZR <n4zr@comcast.net>
Date: Thu, 8 Apr 2021 16:47:24 -0400
I've run across a signal on 40M that has me puzzled.  Because this reflector doesn't accept images, I have put an HDSDR image in Dropbox with a link address of https://www.dropbox.com/s/zgat3frt70zhr
/archives//html/RFI/2021-04/msg00043.html (7,617 bytes)

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