During the Franco era, the only way to receive information in Spain was through French Radio from Toulouse. However, as the country became more democratic, a number of changes took place. Among them, the most notable was the arrival of a national radio station, branded es radio.
https://emisorasderadioonline.es/esradio-en-directo/
Aside from the Spanish Radio, there were semi-official radio stations that belonged to national trade unions and youth organizations. These stations were also free to determine the content of their news programs. In 1978, these semi-official radio stations merged into Radiocadena Espanola. This merger was followed by another one in 1988, which led to Radio Nacional de Espana.