1pc. ОВС-3-1 Backwave tube

NEW (wires have some damages)

datasheet: https://www.morkniga.ru/p831308.html

A reverse wave tube is an electrovacuum device in which, to generate microwave electromagnetic oscillations, the interaction of an electron flow with an electromagnetic wave running along a slowing system in the direction opposite to the direction of electron movement is used.

You will get exactly what you see on the photo.

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