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Re: [RFI] An interesting RFI "noise" on 40 meters

To: rfi@contesting.com
Subject: Re: [RFI] An interesting RFI "noise" on 40 meters
From: David Cole <dave@nk7z.net>
Reply-to: dave@nk7z.net
Date: Sat, 25 Apr 2015 04:59:33 -0700
List-post: <rfi@contesting.com">mailto:rfi@contesting.com>

Be sure to do the home power off test first!  I was helping a fellow
last year track some bad RFI, and he refused to do that test, so I
stopped helping.  He finally did the test, and low and behold he was
causing his own RFI...  

He was kind enough to call me and let me know it was his stuff causing
the RFI, so we tracked it down to a touch lamp.  

He assumed it was the power company for four years, and put up with a 10
over S9 signal across most of 80 meters...  He had some sort of custom
loop strung around under his house eves he bought from a fellow who
looks at your home on Google, and then asks you for measurements, then
creates the loop.  Needless to say, this thing picks up every LED in the

He was floored when the touch lamp was unplugged, and his issue ended...
He is now replacing lots of things in his home to rid himself of RFI.
Thanks and 73's,
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On Thu, 2015-04-23 at 22:12 +0000, Kenneth G. Gordon wrote:
> So, now I have a "new" one...at least for me. Some sort of 
> weird-sounding, very unstable raucus oscillation sound. Appears about 
> every 12 kHz from 7002 kHz to at least 7350 kHz, although that is as far 
> as I've so far tuned for it.
> Wanders back and forth at 2 to 3 kHz while it is on, then suddenly stops 
> for up to 30 seconds following a slight "pop", then resumes. Seems to 
> start out somewhat "quiet" then build in intensity over a period of about 
> 20 to 30 seconds.
> Signal level is 10dB over S-9 throughout the entire spectrum. Normal band 
> noise level during the day here is S-9.
> Receiver is an FT-890 in USB mode. In AM mode, it isn't nearly as 
> annoying, although still strong.
> I have a short .WAV file of it if anyone would care to listen to it. I 
> cannot find anything on the ARRL's sounds of RFI list to match it.
> Ideas?
> Ken W7EKB
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