| Answer | Crossword Clue |
|---|---|
| TRIODES | Some old TV tubes |
| TRIODES | Old TV tubes |
| strontium | a soft malleable ductile metallic element of the alkaline-earth group occurring only in combination and used especially in color TV tubes, in crimson fireworks, and in the production of some ferrites see element table |
| XENON | Gas used in TV tubes |
| YTTRIA | Powder used in color TV tubes |
| TRIODES | Tubes in old TVs |
| YTTRIUM | Element used in old television tubes |
