|
Lee De Forest was the first person to place a third electrode into the thermionic valve, this he did in 1906.
See The Audion and De Forest.
See The 'Electro' Audion of 1911.
See Type T Tubular Audion Bulb.
See A History of the Grid.
See DV and DL valves.
See Isolantite.
See Centenary of Lee de Forest's Birth.
| 