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Sounds like a repetitive first four notes of the original Dr. Who. intro
(1963).
Along with the waterfall display, it makes it even more disconcerting.
Especially the center line.
On Mon, Dec 17, 2018 at 12:52
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Hello Group:
I was transmitting Digital SSTV on the 40 meter band last Saturday morning
when I spotted a strange signal in the waterfall of the Web SDR that I was
running on my Chrome browser (I always keep an
