Ditter(s) on 13560.75 MHz

[zackers]

I've been sitting here listening to some sort of ditters on 13560.75 MHz on Sunday January 12 from about 1845Z to 1910Z (so far). In general there will be a string of 9 or 10 fast dits followed by a dit approximately every 1.3 seconds for several minutes, then two rapid dits and a long pause, then starting up again. There have been variations where seemingly random groups of fast dits in groups of 4 to 16 were sent. For a while there was another ditter about 50 Hz lower in frequency than the main one, which was only active for a couple minutes. It seemed to follow a similar pattern.

The frequency of the ditter seemed to slowly drift up and down over a few Hz range.

Right now (1910Z) it's been silent for several minutes.

[~SIGINT~]

23:50 UTC 06 DEC 2021 - Receiving "ditters" on 13560.700 kHz CW with similar patterns as described in the original post.
00:04 UTC - Signal off air.
00:10 UTC - Observing a similar signal on 13559.990 kHz CW.

RSPduo | Barker & Williamson antenna | Toronto, Ontario Canada

[Heathkit]

These are probably Part 15 HiFer ops.

73's