Resources

Scripts for broadcasts from the Golden Age of Radio:
The Generic Radio Workshop Vintage Radio Script Library

Sound files of many Old Time Radio shows:
Internet Archive - Audio Archive
I found this introduction at the beginning of the Comedy of Danger, 1936. It was too long for the play but it is such a wonderful tribute to Radio I am writing it here under Resources.
"The Columbia Workshop believes in radio---in the past accomplishments and in its promise for the future. Radio has reduced the area of the world to a split-second of time for the transmission of human thought and feeling through man's literature, his music, his spoken words.
In the five centuries since Gutenberg invented movable type and gave the world the store of man's knowledge through the printed word, no discovery has promised greater potentialities for shaping the world's culture than the slim, swift path of the electric wave. With the speed of light, it cuts through the barriers of boundary, class, race and distance. While these words, electrically amplified one hundred trillion times from the microphone to the transmitters which hurl them on the air, are being sent to you on broadcast bands, a hundred other bands of the radio spectrum are busily engaged performing useful functions for man.
At this second, somewhere, twenty-thousand feet above the earth's surface, giant aerial transport Planes are winging their wayabove clouds, through night ans fog, following the straight invisible electric path of the radio beam signal which guides them unerringly to their destinations.
On the high seas or near treacherous shoals and reef-strewn waters, the signal of the radio compass station points the way for mariners when the stars are hidden and sextants useless. 
In hospitals throughout the world, electrical surgery and short wave artificial fever machines , radio's contribution to medicine, are helping scientists in their onslaught against disease and pain.
The purpose of this is to familiarise you, the reader, with the story behind Radio"