This article from the Italian news source, AGI (quoted below) is brief and vague, but according to the Director of Vatican Radio, they will, “end all […] medium wave broadcasts and […] shortwave ones to most of Europe and the Americas.”

We will post more info once available–follow the tag Vatican Radio:

(Source: AGI)

Vatican City – Vatican Radio will end its short and mediumwave broadcasts on 1 July, strengthening its web service.

Spokesman of the Holy See and Director of Vatican Radio, Jesuit Father Federico Lombardi, announced: “From 1 July Vatican Radio will end all its medium wave broadcasts and its shortwave ones to most of Europe and the Americas, which are regions of the world where the rebroadcasting of programmes by the local Catholic radio and internet access are more developed.”