This is some sort of very slow wide shift FSK .

I've seen it reported elsewhere and heard it here too.

John K5MO

On Fri, Jan 30, 2026 at 5:07 PM D.J.J. Ring, Jr. <djringjr@gmail.com> wrote:
>
> People are reporting these strange CW signals across the 40m band.
>
> Weird CW signals
>
> Perhaps they are trying to emulate a mechanical key with no audio control (although a vertical wouldn’t sound like that)
>
> But what could be a purpose?
>
> Another weird thing is that those sigs are present on four frequencies simultaneously with S9+:
>
> 7041.50 kHz
> 7048.50 kHz
> 7063.00 kHz
> 7070.00 kHz
>
> Weird CW on 40m.
>
> Any thoughts on this?
>
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