Deep Purple's biggest moment on the 6th April 1974. The California Jam. Purple headlined the show and chose to go on at sundown. What a show with Ritchie Blackmore at his absolute finest! Behind the stage was a wooden painted rainbow. The stage, designed by Imero Fiorentino Associates, was built around railroad box cars, platforms and hydraulic lifts, so each band's crew could be setting up whilst the previous act were still playing therefore reducing the gap between the bands. Legend has it tha