They primarily rely on the following methods for information:
* The Daily Prophet: This newspaper is their main source of news, although it is often biased towards the Ministry of Magic and doesn't always reflect the full truth.
* Word of mouth: They gather information from other witches and wizards they encounter, especially those who are fighting on the same side.
* Magical communication: They use the magical devices like the Floo Network and owls for communication, receiving updates from their allies and friends.
* The Order of the Phoenix: The Order acts as a network, distributing information and organizing resistance efforts.
Therefore, there isn't a specific radio station they use for news in the books.