[RFI] need ideas on hunting down QRN-like noise source

[Scott Ginsburg]

I can hear it on my moble rig when sitting in my
driveway. It is much weaker than when listening on
the big antenna, but it's definitely in there.


Wes Attaway (N5WA) wrote:
> If you hear the noise on your main radio can you go outside
> and also hear it on your mobile rig?
> 
> -----Original Message-----
> From: rfi-bounces at contesting.com
> [mailto:rfi-bounces at contesting.com]On
> Behalf Of Scott Ginsburg
> Sent: Monday, June 14, 2004 8:50 PM
> To: rfi at contesting.com
> Subject: [RFI] need ideas on hunting down QRN-like noise
> source
> 
> 
> 
> I'm currently plagued with two sources of HF RFI, and for
> the
> moment am concentrating on locating one of them. Any help
> I can get from the RFI sleuths on the list would be greatly
> appreciated!
> 
> The noise in question showed up about a month ago, and
> appears
> as a combination of white noise and random, rapid static
> crashes.
> The static crashes, or bursts, sound a lot like heavy QRN.
> 
> It is typically the loudest on 14 MHz, and can be heard from
> 7-24 MHz
> when it's at its worst, with peaks on 14 MHz of 10 over S9.
> I hear no
> buzzing when listening on AM. My noise blanker has no
> effect.
> 
> Its presence can't be correlated with weather. I hear it on
> both wet
> and dry days, wind or no wind.
> 
> It seems to peak from a certain direction when I listen on
> my HF log
> periodic. I've driven the neighborhood streets (up to 2 mi
> away) with my
> 706 and hamstick in the car and can hear what I think is the
> noise in
> certain locations, but never loud enough to be a "smoking
> gun". I
> verified it's not coming from my house, by killing power and
> listening
> in the driveway on my 706 to the noise.
> 
> Early morning is typically very quiet. At 6:30 AM local time
> I usually
> hear only silence, or a few weak bursts of noise which sound
> like the
> problem. It typically peaks by noon. I almost always hear it
> in the
> evening and at night.
> 
> Any hints anyone might have as to what a possible source
> might be or
> the best way to continue trying to track this down would be
> appreciated.
> 
>                                                   73,
>                                                   Scott,
> K1OA
> 
> 
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