| Answer | Crossword Clue |
|---|---|
| DIODE | Form of vacuum tube. |
| TRON | Word form meaning "vacuum tube" |
| TRIODE | Type of vacuum tube |
| MAGNETRON | Type of vacuum tube |
| TETRODE | Type of vacuum tube |
| ENIAC | Vacuum tube innovation of 1946 |
| ELEMENT | One of the electrodes in a vacuum tube. |
| NIKOLATESLA | Inventor of an A.C. motor and transformer, X-ray technology, and a vacuum tube amplifier: 2 wds. |
