Crossword puzzle clue "certain vacuum tube"

Here are the possible solutions for certain vacuum tube clue

Answer
Clue
Relevancy
diode
Clue
Certain vacuum tube
Definition
a type of electron tube
tetrode
Clue
Certain vacuum tube
triode
Clue
Certain vacuum tube
anode
Clue
Vacuum tube part
___ dark space (region in a vacuum tube)
Vacuum tube part.
Definition
a positively charged electrode
anodes
Clue
Vacuum tube terminals
Vacuum tube parts
Definition
ANODE, a positively charged electrode

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