On March 27, 1963, the public agency Patrimonio Indígena del Valle de Mezquital signed on its first radio station, XHD-FM, with a formal inauguration by President Adolfo López Mateos.
XEZG offered programming targeted at a rural audience, while XHD sought to serve a more urban population.
1982 saw PIVM's radio holdings expand even further, with new AM stations at Tlachinol and Huejutla de Reyes (also now part of RTH).
The name of the organization had changed to Patrimonio Indígena del Valle de Mezquital y la Huasteca Hidalguense (PIVMHH), and the station was known as Radio Mezquital y Huasteca Hidalguense.
XHZG and XHD simulcast, with 94.9 being receivable in Ixmiquilpan proper and 96.5 in the surrounding rural area.