| Answer | Crossword Clue |
|---|---|
| BALUN | Radio device |
| DETECTOR | Radio device. |
| BALUN | Radio converting device |
| ALARM | Clock-radio device |
| RADAR | Radio detecting device. |
| EARPHONE | Pocket-radio device |
| KNOB | Radio tuning device |
| WALKIE | Half a radio device |
| RADAR | Radio detecting and locating device. |
| COHERER | Device used to detect radio waves |
| SELECTOR | Tuning-in device on a radio. |
