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Media & Entertainment · Recorded milestone

Broadcast radio

Recorded year1920

KDKA in Pittsburgh starts scheduled commercial radio broadcasting.

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Built on

Transatlantic radioRecorded · 1901enables
Triode amplifierRecorded · 1906enables

Led to

Home radio setRecorded · 1920enables
Radio commercialRecorded · 1922enables
Car radioRecorded · 1930enables
Baby monitorRecorded · 1937enables
Focus groupsRecorded · 1941enables
Metered audience ratingsRecorded · 1942enables
Transistor radioRecorded · 1954enables

Sources & evidence

Additional source

Dataset updated 2026-10-18. This individual record has not been separately re-reviewed.