to make the station turn a large profit by selling 15–30-minute blocks of time to radio proselytizers. The preachers were able to pay for the time by asking their listeners to send them donations. Because they had such a large following and made so much money, the radio evangelists were willing to pay sizable fees for airtime. In addition to the paid brokered programming, Wolfman began broadcasting his own pre-recorded shows on three different high-powered Mexican stations at different times of the day: XERB, XERF, and XEG in Monterrey, Nuevo León, powered at 100,000 watts. Wolfman courted advertisers who enjoyed his brand of rock and roll music and his howling personality. According to his biography, by 1971, Wolfman was making a profit of almost $50,000 a month. The Mexican company executives that leased XERB noticed this and got greedy. They wanted to throw him out and make all the money themselves. The owners bribed Mexican officials into politically squeezing Wolfman off the air. The Mexican government acquiesced by passing a law prohibiting Pentecostal and Evangelical religious programming on Mexican airwaves. Since XERB made most of its profits from airtime sold to the prayer-cloth preachers, Wolfman could no longer make payments to the owners each month. "That was it," Wolfman remembered. "In one stroke they cleaned out 80 percent of all the money we were expecting to make." He and Kosofsky had to return control of the station to the Mexican owners. Some years later, the Mexican government repealed that law and allowed radio preachers back on the air. But, without Wolfman Jack howling over the airwaves, XERB never duplicated the fame he had brought it. The XERB call sign was recycled in 1986 for a radio station in Cozumel, in the state of Quintana Roo with no relation to the old XERB. XEPRS: The Soul Express With Wolfman out of the way, the station owners tried to duplicate his successful formula. They changed the call letters to XEPRS (“The Soul Express”), programmed at night with soul music, mostly for the African-American and Latino neighborhoods around Los Angeles. The Wolfman still broadcast for over a year while under the new ownership, until April 15, 1972. Airchecks of that last show are still available online; tapes of old Wolfman shows could be heard on XEPRS as late as 1980. In the summer of 1972, George Lucas filmed Wolfman Jack using the studios