The Cuban Hams are pretty good techs. Knew the chief engineer for Radio Havana. Met him when I was living in OK. Had dinner with him and other ham friends. Then to my neighbors shack. Neighbor was an EME guy, super tech.
Arnie (Cuban Ham) was very current on RF devices other than tubes.
He claimed to be a technico not a politico. Did not believe him.
Don't know about the current situation. Haven't worked a Cuban station since '98 or '99, and they were all zampolits back then.
/johnny