Across
- 3. — Audio broadcast device
- 8. — Radio show
- 10. — Early radio term
- 12. — Transmitted sound wave
- 13. — Broadcast band
- 15. — Adjusting frequency
- 16. — Old radio tube
- 17. — Control switch
- 18. — Voice on air
- 19. — Crackling noise
- 20. — Short catchy tune
Down
- 1. — Recording room
- 2. — Sound input tool
- 4. — Station selector
- 5. — Send over airwaves
- 6. — Spoken reports
- 7. — Radio audience
- 9. — Signal measure
- 11. — Sound output
- 14. — Signal receiver