Jack Armstrong, the All-American Boy was a radio

Radio

Radio is the transmission of signals through free space by modulation of electromagnetic waves with frequencies below those of visible light. Electromagnetic radiation travels by means of oscillating electromagnetic fields that pass through the air and the vacuum of space...

 adventure series which maintained its popularity from 1933 to 1951. The program originated at WBBM

WBBM (AM)

WBBM is an all-news CBS radio station in Chicago, Illinois broadcasting on the AM dial at 780 kHz. It is owned by CBS along with WBBM-TV....

 in Chicago

Chicago

Chicago is the largest city in the US state of Illinois. With nearly 2.7 million residents, it is the most populous city in the Midwestern United States and the third most populous in the US, after New York City and Los Angeles...

 on July 31, 1933, and was later carried on CBS

CBS

CBS Broadcasting Inc. is a major US commercial broadcasting television network, which started as a radio network. The name is derived from the initials of the network's former name, Columbia Broadcasting System. The network is sometimes referred to as the "Eye Network" in reference to the shape of...

, then NBC

NBC

The National Broadcasting Company is an American commercial broadcasting television network and former radio network headquartered in the GE Building in New York City's Rockefeller Center with additional major offices near Los Angeles and in Chicago...

 and finally ABC.

The storylines centered around the globe-trotting adventures of Armstrong (played by Jim Ameche

Jim Ameche

James Ameche was a familiar voice on radio, including his role as radio's original Jack Armstrong on Jack Armstrong, the All-American Boy....

 until 1938), a popular athlete at Hudson High School, his friends Billy Fairfield and Billy's sister Betty, and their Uncle Jim, James Fairfield, an industrialist.