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@contesting.com
[mailto:rfi-bounces@contesting.com]On
Behalf Of Scott Ginsburg
Sent: Monday, June 14, 2004 8:50 PM
To: rfi@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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