Radio vacuum tube

A radio vacuum tube is a quest item $$

Gameplay
A repaired vacuum tube, able to contain a vacuum and thus the flow of an electric current. RS-979 is printed in white letters on the lower side.

Crafting
Three broken radio vacuum tubes are required to create radio vacuum tubes for Wren, during the quest the Importance of Communication.

Locations
Can be only be crafted at a tinker's workbench.