I don't usually post videos but this one is very cool. It has been posted at audio asylum and the Klipsch forums.
Telefunken
This has long been one of my favorites. Finding his masters voice by the genius Max Fleischer for Western Electric. This animation was to explain to people how the talkies worked for the first sound movies. Brilliant!
Western Electric
1942 RCA Electrons On Parade Part 1 & 2 Great for tube newbies.