Start with this brief de Forest biography from PBS

A biografia de Lee de Forest en Espanol

About the Audion

A really, really giant photo of the de Forest Audion

Manufacturer Svetlana shows how Lee's invention, the vacuum tube works

A 1916 article on the de Forest Audion from Thomas White Archives

Lee de Forest's Audion evolved out of Edison's lightbulb

Lee Miscellany

An article on Sound-on-Film from the 1947 SMPE Journal

De Forest v. Armstrong, 1934, US Supreme Court

Yes, there really was an Audion Piano

Learn about a 1920s era de Forest radio receiver

The End of Lee

In the end, de Forest was buried here