According to our friends at priyom.org, this is a Russian military signal, but I'm not clear as to it's purpose. I am clear however on the fact that I've never heard it before, so this is a PF.

Recorded in Oxford on 14/03/21 at 01:27 hrs UTC using a Wellbrook ALA1530 magnetic loop, outdoors.

Thanks for watching, keep safe, 73.

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