1125 UTC I came across this strange signal (to me) what is this on both frequencies at the same time?
it repeats break then repeat again.

Audio 1:
https://voca.ro/1jihO0DhOBYHAudio 2:
https://voca.ro/1kFUeepBB7hlS 3 to 4 via University of Twente Netherlands sdr, must set filters to 6.76 KHz.