Casey Kasum was one of the voices of my childhood. In addition to top 40 he also was a DJ at an LA radio station. When I visited my grandmother in LA every summer for two weeks I would listen to him. I was rock deprived growing up with mostly Country Western music which I hated. One station was rock and it was daylight only.
Back in the 60's most music was AM and some big stations had powerful signals that you could hear at night (as many of you Philies phans know, catching night time signals from 1240 from far away.)
My other two voices of my childhood were Dick Clark and Wolfman Jack. I could often catch the Wolfman from San Francisco station at night.