sentences:  XERF was not a continuation of XERA.The facilities of the old XERA border blaster, which had been created by John R. Brinkley, were confiscated by the Mexican government in 1939, and Villa Acuña did not have another high-power station until February 22, 1947, when the Compañía Radiodifusora de Coahuila, S.A., headed by Ramón D. Bósquez and Arturo González, signed XERF-AM on the air on 1570 kHz.The station used XERA's old transmission site, with a power of 50 kW (later increased to 100); its first day of broadcasting included a formal opening featuring programs from the chambers of commerce of both Villa Acuña and Del Rio, Texas and the presence of the Bishop of Saltillo.