| Answer | Crossword Clue |
|---|---|
| ALLPASS | Radio signal term |
| BEEP | Radio signal. |
| BEAM | Radio signal. |
| ATEST | Periodic radio signal |
| TONE | Radio time signal |
| BEEP | Radio time signal |
| BEAMS | Radio-signal directions. |
| ANTENNA | Radio signal catcher. |
| SOS | Radio code signal. |
| PREAMP | Radio signal booster |
| BEAM | Radio signal for pilots. |
| TUNEIN | Receive, as a radio signal |
| BEAM | Radio signal from a landing field. |
| BEAM | Radio signal for guidance of aviators. |
| NOISE | All but the signal, in radio |
