How can private collections help uncover previously untold chapters in the history of radio broadcasting? This working paper explores the role of photographs, letters, and memorabilia sent by international radio stations to their listeners (1960s–90s) and exchanged among listeners themselves. These materials shed light on how unintended radio audiences emerged across Asia and Africa through the medium. Drawing on the author’s visit to the Azamgarh district and nearby towns in Uttar Pradesh, India, in March 2024, the piece recounts the serendipitous discovery of Afro-Asian radio networks.