| Answer | Crossword Clue |
|---|---|
| DIODES | Vacuum tubes. |
| DIODES | Vacuum tubes |
| TRIODES | Vacuum tubes |
| DEGASSED | Made vacuum tubes |
| TETRODES | Certain vacuum tubes |
| TRIODES | Some vacuum tubes |
| NEON | Element in vacuum tubes |
| NEON | Inert gas in vacuum tubes |
| TRIODES | Vacuum tubes containing three elements |
| ANODES | Positive poles in vacuum tubes. |
| ENIAC | Computer with 18,000 vacuum tubes |
| ENIAC | Giant with 17,468 vacuum tubes |
| ARGON | Inert gas used in vacuum tubes |
| ENIAC | Computer that contained 17,468 vacuum tubes |
| DIODES | Vacuum tubes, used to rectify alternating currents. |
