Extra Class License

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Across
  1. 3. DX signals via ionosphere
  2. 5. Digital Signal Processing in receivers
  3. 11. Matching antenna orientation
  4. 14. Basis of all radio communication
  5. 18. Converts AC to DC in circuits
  6. 19. Circuit for SSB generation
  7. 24. Frequencies in GHz range
  8. 25. Reduces specific interference
  9. 26. Amplitude and frequency techniques
  10. 27. Volunteer examiner for tests
  11. 30. Combines signals in SSB radios
  12. 31. Knowledge of advanced ham resources
  13. 32. Matching for maximum signal transfer
  14. 33. Cards confirming international contacts
  15. 34. Modes like RTTY and FT8
  16. 35. Stable source for rigs
  17. 36. Basic and efficient antenna
  18. 37. Multi-band HF antenna design
  19. 38. Access to all amateur bands
  20. 39. 4 Advanced exam content for Extra Class
Down
  1. 1. Signal weakening over distance
  2. 2. HF disruption due to solar activity
  3. 4. Creates precise radio frequencies
  4. 5. Focus of antenna radiation pattern
  5. 6. Signal reflected by ionosphere
  6. 7. Efficient power transfer
  7. 8. Circuit used in filtering
  8. 9. Broadband directional antenna
  9. 10. Unit for signal strength comparisons
  10. 12. For tuning circuits
  11. 13. Access to orbital relays
  12. 15. Exclusive Extra portions of HF bands
  13. 16. Advanced abbreviations like QRZ and QSX
  14. 17. Matches radio to antenna
  15. 20. Oscillator for resonance testing
  16. 21. Generates stable frequencies
  17. 22. Specific frequency ranges for Extras
  18. 23. Yagi, quad, and long-wire planning
  19. 28. Design and troubleshooting focus
  20. 29. For sharp frequency selectivity