A weblog by Greg Williams, K4HSM discussing mostly amateur radio and FCC issues.
Friday, May 25, 2012
The return of the vacuum tube
Peer inside an antique radio and you'll find what look like small light bulbs. They're actually vacuum tubes—the predecessors of the silicon transistor. Vacuum tubes went the way of the dinosaurs in the 1960s, but researchers have now brought them back to life, creating a nano-sized version that's faster and hardier than the transistor. It's even able to survive the harsh radiation of outer space.