U.S. "Carr Collins Crazy water crystals" (a mineral treatment and patent medicine) was a well known advertiser, as was "Baby Chicks by Mail". Some listeners remember hearing religious programs were aired, sometimes with offers to send money in exchange for "autographed photos of J. Christ of Biblical fame". In the years following World War II and during and following the Korean War, U.S. troops returning by sea from the Orient heard their first US-based radio broadcasts from this station, which frequently aired a radio evangelist who offered "send five dollars for your free autographed picture of Jesus Christ with eyes that glow in the dark." The daytime line-up moved in 1972 to a U.S. station, KAMA 1060 (now KXPL) in El Paso, Texas. Around that time, a group of American investors ( Grady Sanders, Bob Hanna, John Ryman and Bruce Miller Earle) leased the station and turned it into an English language top 40 radio station, with XELO being changed to XEROK. In the 1970s and into the 1980s, the station promoted itself as X-Rock 80, The Sun City Rocker due to its proximity to the "Sun City", El Paso. In spring 1975, XEROK was the highest rated top 40 radio station in the United States, with the possible exception of New York's WABC, according to Arbitron. It is not generally known that XEROK was live in only brief periods of operation due to Mexican government restrictions on foreign language programming. At the beginning the programs were recorded, in real time, on tape and the tapes were carried by messenger to the transmitter site where they played after a 24-hour delay, a concept similar to voice-tracking used by many stations today; this allowed the announcers to announce real clock times, but not material that is required to be accurate and timely, such as accurate weather forecasts. The exception, by 1975, was "morning drive" programming, which was on a 4-hour delay that allowed for timely news and weather reports. Later, the recordings were made 12 hours ahead of time. Still later the station ran several parallel studios so that four shifts were recorded at a time. In 1977-78 studios were used at the tower near Satélite, Chihuahua for live operation. Eventually, the owners were granted permission from the FCC to install a 950 MHz studio-transmitter link (STL) across the border to feed the transmitter from El Paso live. The Mexican government