We remember the film "American Graffiti" and the fictional station where Wolfman Jack worked. The actual station was of course XERB-XEPRS, but a more realistic model of the big Mexican rock 'n roll blaster of the '50's and early '60's would have been Mighty 690 XEAK. I spent a summer on a farm near Ukiah, north of the Bay Area and every night that was the station all the kids listened to and that the kids up and down the Central Valley listened to, like kids in the Midwest and mountain states listening to KOMA, or east coast kids often listened to WKBW at night. The old top 40 surveys from that era are educational, top 40 stations were programmed for maximum listenership; on the same survey you could find songs by Frank Sinatra, the Beach Boys, the Penguins, or the Mormon Tabernacle Choir. I think in that era XEAK transmitted from La Presa, somewhat southeast of Tijuana and fairly far from the coast. Although it was rated at 50kw there are some who think it actually ran closer to 100kw to help get the signal into LA.