| Answer | Crossword Clue |
|---|---|
| TRIODES | Vacuum tubes containing three elements |
| triodes | vacuum tube containing three elements, usually anode, cathode, and control grid |
| triode | vacuum tube containing three elements, usually anode, cathode, and control grid |
| transistors | A portable radio using circuits containing transistors rather than vacuum tubes |
| transistor | A portable radio using circuits containing transistors rather than vacuum tubes |
| TRIODE | Vacuum tube with three elements |
