In 1947, his radio show debuted as a summer replacement for The Jack Benny Show. It ran Sundays at 7 and was sponsored by Lucky Strike. Episode titles such as "Interview With Beauty Contest Loser," "Singing Cowboy Parody," and "Spoofs on Fan Magazines And Disc Jockeys" go a long way in telling the story.
As good as the radio show may have been, in didn't last long--Paar quickly made the jump to television. It was good while it lasted, and episodes are still available.