Reproduction of this puzzle without the express permission of RF Cafe is prohibited.  1. Emitting a radio wave 9. Band between RF and BB 10. Shorthand for oxygen 11. Time delay (abbr.) 12. Stock symbol for Hewlett Packard 14. Satellite EHF Communications for Mobile Multimedia 16. Half of DSB 18. Computer messaging service 21. 30 kHz to 300 kHz 23. Local Oscillator (abbr.) 24. Upward force generated by an airfoil 25. Brightest star in the sky 28. Electric coronal discharge 30. Software drafting tool (abbr.) 31. Programmable logic device (abbr.) 33. Type of logic gate (pl.) 35. Irratiated cosmic gas 37. Chemical symbol for radon 38. Unit of energy (pl.) 40. Stock symbol for Raytheon 41. Beat frequency oscillator (abbr.) 43. This website's title, with 39 Down 44. Chemical symbol for cesium 45. Mr. Morse's first name 46. Specialized mobile radio (abbr.) 49. Exponent that returns the original number 50. Positive voltage lead color 52. _____ Percy Maxim, founder of the ARRL 55. Chemical compound containing at least one oxygen atom as well as at least one other element (pl.) 57. Prefix meaning ground or earth 58. Filter type that blocks frequencies below and above a specified band (abbr.) 60. Chemical symbol for europium 61. Part of a screw that engages the driver (pl.) 62. Crystal filter type (abbr.) 64. What common optical device produces images by reflection 66. Type of data conversion device (abbr.) 68. Chemical symbol for neon 69. Ratio of circumference to diameter 70. Chemical symbol for beryllium 71. Added signal content to offset losses or distortion | 1. Computer display unit (pl.) 2. Microwaves & __ magazine 3. The antiparticle of an electron 4. Wheel attachment point 5. Referring to atoms 6. Time Division Multiplexing 7. Unit of inductance (abbr.) 8. World's first satellite navigation system (abbr.) 13. Ham's code for "Can you acknowledge receipt?" 15. Roller bearing devices on sides of rack-mounted equipment (pl.) 17. Company that markets Delphi software 19. Unit of processor calculation speed (abbr.) 20. Colorado Springs military school (abbr.) 22. Upper frequency (abbr.) 26. Useful distance between Tx and Rx (pl.) 27. Unintended frequency products from a mixer 29. Chemical symbol for krypton 32. ___-AZIMUTH telescope mount 34. Created an impenetrable physical barrier 36. Soaks up RF energy 37. International phonetic alphabet letter "R" 39. This website's title, with 43A 42. Cooling device 43. Its chemical symbol is Ce 44. Pass-Fail ________, defining limits for acceptance test 47. Unit of inductance (abbr.) 48. 36 inches 51. What is the name of the unit of angular measurement equal to one ninetieth of a right angle 53. Government program to bring electricity to farms (abbr.) 54. Placed a blocking template over a PCB layout 56. Chemical symbol for xenon 59. Attenuator 61. Communication between stations by reflecting the radio waves off of the ionosphere (pl.) 63. Ham abbreviation indicating contacts with all major land masses 65. Indium phosphide 67. Chemical symbol for cobalt 70. Chemical symbol for beryllium |
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