XHTF-FMXHTF-FM is a radio station on 100.3 FM in Monclova, Coahuila, Mexico, known as Estéreo Tiempo.WWW estereotiempo.com.mx/inde...HistoryXHTF received its concession on February 16, 1982. It was owned by Humberto Medina Ainslie with an ERP of 10 kW. It was sold to Martínez Ramón in 1986.