'The invention of the traveling-wave tube' -- subject(s):
Traveling-wave tubes
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Yes, a traveling wave tube or TWT is a pulsed device.
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That would be a TWT amplifier (traveling wave tube).
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A tubing wave is one that produces a tube, a tube is when the
lip of the wave breaks in a circular form, and does it far from the
face of the wave, letting a surfer enter it and being able to ride
it.