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Hears about extremely old valves – Crossword Clue

Below are possible answers for the crossword clue Hears about extremely old valves.



Clue Length Answer
Hears about extremely old valves7 letterstriodes
  1. Definition: 1. a thermionic vacuum tube having three electrodes; fluctuations of the charge on the grid control the flow from cathode to anode which makes amplification possible