Radio Habana Cuba is an international service so I wouldn't know why it would be on FM anywhere on the island. There is a domestic network called Radio Cadena Habana.
I do believe RHC is on FM in the major Cuban metropolitan areas...106.9 in La Habana comes to mind. Though the days of picking up Cuban FMs in the Florida Keys are long gone...so good luck trying to hear it outside of Cuba besides on SW.
The one thing that boggles my mind is not being able to find an internet stream of any Cuban TV nets. All the national radio nets stream online. Hell, an even more repressive socialist regime (DPRK) has their few hours of nightly TV broadcasting streamed! In HD, nonetheless!
Considering Cubans are taking to the internet (where possible) like ducks take to water, plus the overall curiosity of outsiders, it seems puzzling that there'd be no online video stream.