| Answer | Crossword Clue |
|---|---|
| TRIODE | Certain electron tube |
| DIODE | Certain electron tube |
| BIODE | Electron tube |
| DIODE | Electron tube |
| TETRODE | Electron tube. |
| BULB | Electron tube. |
| TRIODE | Electron tube. |
| DIODE | Electron tube. |
| TRIODE | Electron tube |
| TETRODE | Electron tube |
| ANODE | Electron tube part |
| ANODES | Electron tube parts |
| DIODE | Electron tube type |
| ANODE | Electron-tube element |
| ABATTERY | Electron tube heater |
| TRIODE | Electron tube type |
| DIODE | Type of electron tube |
| DIODE | Two-element electron tube |
| DIODE | Electron tube with two elements |
| ANODE | Positive terminal of an electron tube |
| GRID | Wire mesh in an electron tube. |
| CATHODE | Electron source in a picture tube |
