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

Dale J. dj2001 at mn.rr.com
Wed Jun 16 19:37:00 EDT 2004


Sounds like electrical storm static. Otherwise I don't know, never 
heard anything like that at my QTH.  Would be good if you could ID it.

Dale, K9VUJ


On Jun 16, 2004, at 18:21, Scott Ginsburg wrote:

>
> Alex, KR1ST, has done me a huge favor by posting
> a couple of .wav files on his website which contain
> about 10 seconds each of my HF noise, one recorded
> on AM, the other on upper sideband.
>
> They are:
>
> http://www.kr1st.com/k1oa/k1oanoise-20M-AM-6-15-04.wav
> http://www.kr1st.com/k1oa/k1oanoise-20M-USB-6-15-04.wav
>
> If anyone needs longer samples please let me know and
> I can generate another file.
>
> 					tnx and 73,
> 					Scott, K1OA
>
>
>> Can you record this noise at it's worse and put it in a .wav file so 
>> we can
>> listen to it. Hearing it can give us some ideas.
>> ----- Original Message ----- From: "Scott Ginsburg" <k1oa at comcast.net>
>> To: <rfi at contesting.com>
>> Sent: Monday, June 14, 2004 8:50 PM
>> 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
>>>
>>>
>>> _______________________________________________
>>> RFI mailing list
>>> RFI at contesting.com
>>> http://lists.contesting.com/mailman/listinfo/rfi
>
>
> _______________________________________________
> RFI mailing list
> RFI at contesting.com
> http://lists.contesting.com/mailman/listinfo/rfi
>



More information about the RFI mailing list