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View Full Version : RCA Electrons on Parade



MartinT
16-06-2010, 18:03
In case some of you didn't catch this, a couple of RCA videos that show how much went into making valves. Fascinating.

http://www.youtube.com/watch?v=QCksgN7kiv4

http://www.youtube.com/watch?v=J61hHMjxzC4&feature=related