Engineering News

From Engadget:

Pretty much the only place you see vacuum tubes any more is inside a quality audio amp. But, once upon a time, they were the primary ingredient in any piece of electronic equipment, including computers. The glass tubes have since been replaced with the smaller, less fragile and cheaper to manufacture silicon transistor. There are, however, disadvantages, to transistors. For one, electrons tend to move more slowly though the semiconductors, and two, they're highly susceptible to radiation. The second of those problems doesn't affect us much here on Earth, but for NASA it poses a major obstacle. Engineers have finally managed to combine the advantages of both vacuum tubes and silicon transistors, though, in what has been dubbed "nano vacuum tubes."

Read the whole article