SDR recording catch. I was going to log this as a pirate testing a homebrew rig, but instead it appears it was a ham.
There were frequent short transmissions, with a very drifty carrier. Each transmission, the carrier frequency would drift down about 1 kHz during the several minute long transmission.
Signals were weak at first, then got stronger, as the band opened. This was one side of the transmission. Mention of AM Rally.
Last heard at 1526.