Flipped the SRF-M37V on at 0430L and had a quick scan. There on 570 Khz were the familiar time pips of Cuban AM radio.
570 Khz, 0830 UTC, Radio Rebelde
Propagation peaked a few minutes later and I got a positive ID. Interesting they ID as Radio Rebelde and not Radio Reloj. 2009 WRTH shows 570 Khz as a Radio Reloj outlet. But the ID was there, plain as day. A good haul on the ultralight. Distance figures out to about 1393 miles.