[Boatanchors] All boatanchors defeated. What was it?

[McDonald, J Douglas]

I'm a listener only on my boatanchors.

Tonight all of them were totally defeated. Up until right now, 755 PM CDT, there was
some something going on on 40 meters, between roughy 7020 and 7025 kHz CW.
I abruptly stopped.

A smaller version continues on 7010-7013.

Every few seconds a dense cluster of CW signals appeared, sending call signs,
then stopping all dead. They were typically 100 Hz apart, not on a grid, so some
were as close as 25 Hz.

Even the R390a with at 100 hZ and the audio filter could nowhere near
separate them .. and my ear barely could even with that help.

My Airspy at 40 hZ bandwidth and 1000 order filter could do the job, barely.
At 40 Hz ringing got fairly bothersome at the high speed.
These had to be computer generated signals because of the time clustering.

Some sort of contest?

A new fad?

Doug McDonald