I went back and checked my SDR recordings and found a very weak fax image starting at 1142 UTC, I think there was an earlier one also which is probably what Skipmuck picked up, on 6948.1 USB. I suspect this is VALPARAISO PLAYA ANCHA, CHILE (CBV) as they were received on 6942 USB at 2306 UTC 23 June 2019:
https://www.hfunderground.com/board/index.php/topic,55305.0.htmlThey are scheduled at 1130 UTC, although not on either of these frequencies. Maybe their schedule is more of a best guess than reality

Not perfect greyline conditions to Chile, but close.
Here is what I got. Weak, but 100% sure this is fax:
