Ham radio challenge

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Across
  1. 2. code
  2. 3. contact
  3. 7. league
  4. 8. signal-extender
  5. 10. ham-record
  6. 12. noise-limiter
  7. 14. simple-antenna
  8. 16. makes-dits
  9. 17. messaging
  10. 19. load
  11. 20. dig-mode
  12. 21. sound
Down
  1. 1. antenna-orientation
  2. 4. point-to-point
  3. 5. was
  4. 6. cycles
  5. 8. teletype
  6. 9. joiner
  7. 11. directional
  8. 13. dit-dah
  9. 15. manufacturer
  10. 18. antenna-metal