Hi. I think this is a encrypted communication.
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Initially I thought it might be encryption of some kind, it kind of sounds a bit like old voice inversion encryption. So I ran the signal through a voice inversion decoder, and I still ended up with junk.
Of course, that does not mean it is not some other kind of encryption, or some combination of encryption techniques.
However, the data is the same every cycle. That means if it is encrypted communications of some kind it is the same ~20 second loop, over and over for hours, with no changes.
Encrypted source or not, it still seems like a junk transmission. The other day a different waveform showed up, it looked like Gaussian noise or possibly PSK of some kind, on the same two frequencies (9008 and 9024 kHz). It was never really strong enough for me to do much with it, conditions were poor. But the 2 signals started at the same time and ended at the same time, so possibly connected. And while this possible signal was up the normal DSB was not seen.
T!