[Elecraft] OT: Digital Signals on 20M

[dyarnes]

Ken,

I don't know what they are, but I hear them too--on all radios.

Dave W7AQK


----- Original Message ----- 
From: "Kenneth Moorman" <nu4i at cox.net>
To: <Elecraft at mailman.qth.net>
Sent: Friday, March 27, 2009 8:44 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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