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Traveling-wave tubes: The unsung heroes of space exploration

What do televisions and space exploration have in common? No, we're not talking about a cheesy physics joke; rather, this is the story of an often-overlooked piece of equipment that deserves a place in the annals of telecommunication history. Now, researchers have reviewed the history of TWTs.

from Top Technology News -- ScienceDaily https://www.sciencedaily.com/releases/2019/03/190327131913.htm
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