Andy,

What was the frequency ?

Somewhere in the vicinity of the 80 meter band, probably....
It is drifting a few Hz around 3593.55 kHz.
A mixer/BPF/PA is on the workbench. It will eventually
become GPS disciplined.

QRSS would be an interesting way for those of us who don't and won't use CW
to cross the Atlantic on topband.  No comments from Scarborough please !

Didn't you see the screenshot of a mysterious signal that
M0BMU posted a few days ago?

73
Johan SM6LKM