[Elecraft] OT: Digital Signals on 20M

[Iain MacDonnell - N6ML]

I've heard, in the last couple of days, that the ARRL Intruder Watch is
looking into this.

     ~Iain / N6ML


Dave Larson wrote:
> It's peaking at 10 over here at a heading of 130 degrees from SE Michigan.
> 
> Dave, K8AA
> 
> ----- Original Message ----- 
> From: "Kenneth Moorman" <nu4i at cox.net>
> To: <Elecraft at mailman.qth.net>
> Sent: Friday, March 27, 2009 11:44 AM
> Subject: [Elecraft] OT: Digital Signals on 20M
> 
> 
>> For the past several days I have been seeing a couple of powerful digital
>> signals, S9+, between 14.018 to 14.032MHz.  They seem to be comprised of 4
>> or 5 discrete frequencies rapidly moving around in a bandwidth of about
>> 2Khz.  When working with a narrow filter it is possible to work through
>> them, with difficulty.  With a wide filter, 2.8KHz set to the center of
>> their bandwidth it sounds like a group of castanets clicking away with
>> slightly different tones.  I might have just discounted them but for the
>> fact that I have just recently gotten a "poor man's" panadapter using a
>> Rockmite and Z10000 amp from Clifton Labs with the Rocky software 
>> monitoring
>> my K3's IF output.  These two signals have been here every time I get on 
>> 20M
>> and are quite impressive in the amount of bandwidth they occupy.  I have 
>> not
>> seen this on any other band.  Forgive my ignorance of digital modes, but I
>> just don't recall hearing this sort of signal before.  Can anyone let me
>> know what this might be?
>>
>> Ken, NU4I
>>
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