[GreenKeys] mystery Signal on 4004kc I can't decode (with plastic tty)

[Dave Mayfield]

I hear it there all the time, I don't know what it is either. But it's 
just below where the MARS guys hold there nets, so perhaps it some MARS 
traffic.

Dave
W9WRL.com

kf6pqt wrote:
> Its 850 shift... Anybody have any idea what this is, and what the
> correct settings are?
>
> Thanks,
> Jason kf6pqt
>
>