Two daytime reports on 600 AM; around 2PM in downtown Saint Petersburg, dxing outside(only place to dx without interference from routers, printers etc)..........a very faint not listenable signal, so faint that at first I could not even determine the language, but then patience paid off, and I heard English and a commercial, so it had to be Jacksonville.
About 90 minutes later in eastern Hernando county, it was clearly and listenable, AM 600 out of Jacksonville.
At night, in Saint Petersburg, it is Cuba; will have to check to see what is on 600 AM at night in eastern Hernando county.
During the four years (ending in 2016) that I was spending most of January on Treasure Island (about 7 miles west of downtown St. Pete), a very weak 600 from Jacksonville was what I was hearing. But on the beach, I could null it and hear WVOG (1kw) from New Orleans. At night, it was all Cuba.