Vacuum tube
device that controls electric current between electrodes in an evacuated container
gas-filled tube
traveling-wave tube
magic eye tube
disc seal triode
Crookes tube
Inductive output tube
X-ray tube
triode
pentode
pentode
tetrode
phototube
cavity magnetron
acorn tube
subminiature vacuum tube
photomultiplier tube
combination tube
Electron tube display
beam tetrode
Wunderlich
high-voltage shunt regulator tube
diode
cathode ray tube
image intensifier
klystron