Positively charged electrode that attracts the electrons.
Placed between cathode and anode to control the volume of electrons. vacuum tube
Heated (white-hot) to "boil off" electrons via thermionic emission. Positively charged electrode that attracts the electrons
Basic rectifiers, converting AC to DC.
Examples include "magic eye" tubes for signal display, thyratrons, and magnetrons. Key Technical Details and magnetrons. Key Technical Details