Crossword puzzle clue "radio tube gas"

Here are the possible solutions for radio tube gas clue

Answer
Clue
Relevancy
argon
Clue
Radio tube gas
Vacuum tube gas
Fluorescent tube gas
Vacuum-tube gas
Definition
an inert gaseous element
xenon
Clue
Radio tube gas
anode
Clue
___ ray (stream of positive ions in a gas-discharge tube)
Definition
a positively charged electrode
argo
Clue
Gas in a vacuum tube
neon
Clue
Tube gas
Definition
a gaseous element

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