I'm still catching up on my reading. For example...
From the Annals of the New York Academy of Sciences, Vol XXVII, pp. 215-243, 2 August, 1917:
Operating Features of the Audion by E. H. Armstrong.
The Audion was an electronic detecting or amplifying vacuum tube invented by American electrical engineer Lee de Forest in 1906.
Edwin Howard Armstrong was an American electrical engineer and inventor, best known for developing FM radio and the superheterodyne receiver system.
Enjoy!
From the Annals of the New York Academy of Sciences, Vol XXVII, pp. 215-243, 2 August, 1917:
Operating Features of the Audion by E. H. Armstrong.
The Audion was an electronic detecting or amplifying vacuum tube invented by American electrical engineer Lee de Forest in 1906.
Edwin Howard Armstrong was an American electrical engineer and inventor, best known for developing FM radio and the superheterodyne receiver system.
Enjoy!
