I've been hearing this lately on the low end of the 20m CW band. A noise
that sounds like a distant machine gun. There's a burst a few seconds
long, and then a response -- obviously from another station.
These signals are wide-ish, taking up a few kHz. The K3 DSP noise
blanker reduces their amplitude a little but doesn't eliminate them.
I'm pretty sure they are not amateur signals -- they are not on
'digital' frequencies, they are in fact too wide to be legal in the
CW/digital part of the band, and they are very loud.
Does anybody know what they are?
--
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco
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