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Re: [RFI] RFI Identification Help

To: "Dale" <svetanoff@earthlink.net>, <rfi@contesting.com>
Subject: Re: [RFI] RFI Identification Help
From: "John Geiger" <af5cc@fidmail.com>
Date: Wed, 13 Nov 2013 03:08:06 -0000
List-post: <rfi@contesting.com">mailto:rfi@contesting.com>
I pretty much determined it isn't coming from my house. This morning I had a little time before work, and the noise showed up again, so I turned off all circuit breakers except for the one that the shack was on. My daughters bedroom is on the same breaker, but I turned off all of the power strips in her room and that turned everything off. Also turned off everything else in the shack except for the power strip that the rig is one. That also powers the rotor and laptop. Those things are always on and the noise isnt always there.

It stayed on with everything off, so must be outside of my house. It went away shortly after I did this test. It doesn't seem to be on at night, so wonder what might run during the day with this type of cycling that wouldn't be running at night.

73 John AF5CC
----- Original Message ----- From: "Dale" <svetanoff@earthlink.net>
To: "John Geiger" <af5cc@fidmail.com>; <rfi@contesting.com>
Sent: Monday, November 11, 2013 4:33 PM
Subject: Re: [RFI] RFI Identification Help


John,

Locating the source is usually faster than speculating as to what it might be. Start with the usual - power the '706 with a battery supply and then turn off power in the ENTIRE house when you are hearing the noise. If the RFI goes away, the source is somewhere in your house and you can then start re-applying power one circuit breaker at a time until the noise returns. You then need to examine every device on that circuit.

If the RFI does not go away when you power down the house, then it is time for action. You will need to take the '706 mobile or portable and start traveling around the neighborhood, or even further. Incidentally, try using the rig in AM mode to see if you can hear the RFI better than with SSB. Keep us posted on how it goes.

73, Dale
WA9ENA


-----Original Message-----
From: John Geiger <af5cc@fidmail.com>
Sent: Nov 11, 2013 10:24 AM
To: rfi@contesting.com
Subject: [RFI] RFI Identification Help

I have an RFI problem that mostly shows up during the day, and affects most bands, although I notice it most on 15 and 12 meters as I am on those bands more during the day. It is a buzzing type noise that comes in around S6 or
so on my Icom 706MKII, and the NB won't do anything about it.  It doesn't
show up all of the time, but comes and goes,  It seems to cycle with 4
seconds on and 3 seconds off, and sometimes will cycle quicker than that.
Anyone else seen an RFI issue like this and have any idea what it might be?
It doesn't seem to occur at night.

73 John AF5CC

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