For Guest,Kendall--are you sure Beemer played Superman? The Ranger was a show out of Detroit, Superman from New York. Supposedly Beemer was disallowed from other roles during the run of the Ranger show (ended 1954), but did play Preston briefly after that. Checking Superman pages shows that only Bud Collyer (Collier) played Superman/Clark Kent during the radio years, and the animated cartoons (movies and TV) 'til his death.

For Mark--I remember Nabisco Shredded Wheat as the sponsor of Straight Arrow; Quaker Puffed Wheat (Sparkies) & Quaker Puffed Rice sponsored Preston.

FYI, the other major radio show from the Ranger/Preston company was The Green Hornet, who was the grand (or great-grand) nephew if the Lone Ranger. All three originated in Detroit and had much the same repetory company playing in each of those shows.