In article ,
"Rick KB1KIL" wrote:

13:30 UTC
9.570 KHZ

I wonder what's up with them today? Hardly any audio. Seems to be a little
mixing going on as well.

I listen to them now and then and have noticed low modulation on all of
their frequencies. Sometimes I also hear birdies in their transmissions.
I think they are into minimal processing with the aim of generating
maximum fidelity (maximum hf pre-emphasis).

Tim Brown