Reproduction of this puzzle without the express permission of RF Cafe is prohibited. 
| ACROSS | DOWN | 1. Element used for super accurate clocks 4. The "E" in laser 8. Chemical symbol for ruthenium 11. _____ + 19 Across... to you! 13. Transition from solid to liquid phase 15. Nickname given to a satellite (pl.) 18. Official Space Shuttle designation (abbr.) 19. 10 Across + ______... to you! 20. Common gateway interface (abbr.) 21. Constellation : The lion 23. Chemical symbol for erbium 25. Low- to mid- frequency RF connector 27. Common shorthand reference for a capacitor (pl.) 28. An alloy whose resistance barely changes with temperature 31. European spectrum allocation agency (abbr.) 34. Chemical symbol for radium 36. Input intercept point (abbr.) 38. Constellation : The crow 41. 3 GHz to 30 GHz 43. Chemical symbol for aluminum 44. Probable location of an element's electron 45. One factor of a polynomial 46. The "E" in TEM 47. Chemical symbol for scandium 48. Positive voltage lead color 49. Aircraft tracking system (pl.) 50. Method of self-detection and self-fixing transmission of digital data (abbr.) 51. Chemical symbol for arsenic 56. x, y, or z on Cartesian coordinates 58. Complex resistances 61. 10^-9 numerical prefix 62. Digital encoding of the transmission mode in the vertical sync portion of an SSTV image (abbr.) 64. Unit of time (abbr.) 65. Akin to EEs, CEs, AEs, etc. 66. Common average used for sine waves (abbr.) 68. PC Card - with 68 pin interface 71. Code for a type of electrical wire insulation (abbr.) 72. Part of CAD 73. Quantum electron property 74. Turns on the computer 76. Chemical symbol for silicon 78. Rotary electrical transformer used for measuring degrees of rotation 79. Enclosure (pl.) | 1. Type of flip-flop 2. Sets a steady-state voltage reference 3. SIP x 2 (pl.) 5. Small DIP package (abbr.) 6. Its chemical symbol is I 7. Chemical symbol for neodymium 8. Flip-flop control input 9. The "U" in UHF 10. Stationary charges 12. Permeability-tuned oscillator (abbr.) 13. 1/000 of an amp (abbr.) 14. Test equipment (abbr.) 16. Computer monitor cable type (abbr.) 17. Test equipment that provides a time-domain signal display (pl.) 21. Filter type that blocks upper frequencies (abbr.) 22. Linux Operating System (abbr.) 24. Computer interconnection scheme (abbr.) 26. Logic gate output configuration (abbr.) 29. What a capacitor is used for regarding energy 30. Uncharged atomic particle 32. An efficient microstrip corner shape 33. Rotating disk 35. Portion of a circle 36. Type of digital filter (abbr.) 37. Attenuator 39. Unit of length equal to 5.5 yards 40. Voice of America 41. Below ELF 42. U.S. Spectrum allocation agency 43. Amateur Radio Association (abbr.) 52. Peak Inverse Voltage 53. Miniature RF connector 54. Finite-Element Model 55. Last stage in transmitter (abbr., pl.) 57. Brightest star in the sky 59. Does a total memory transfer 60. Computer character set (abbr.) 61. Classical physics guy, British 63. Electronic component package type (abbr.) 65. Unit of admittance 67. Physical barrier 69. Chemical symbol for cesium 70. One port of an amplifier 71. Unit of weight (pl.) 75. Chemical symbol for praseodymium 77. Filter type that blocks frequencies in a specified band (abbr.) |
Answer below

|