2.Reproduction of this puzzle without the express permission of RF Cafe is prohibited. ACROSS DOWN 1. Inventor of the high voltage generator that powers the Jacob's Ladder (first & last name) 8. Amateur Radio Association (abbr.) 9. High Data Rate 10. Plasma atmosphere layer of the sun (pl.) 15. Radio term for indicating the end of a transmission segment 17. Transportation accident investigation agency (abbr.) 19. Studies for a test just before taking it 20. Wrapped plastic insulation around an 2. Stock symbol for Boeing 3. The "E" in BER 4. Chemical symbol for radium 5. Chemical symbol for rhodium 6. Graphics workshop software 7. Chemical symbol for argon 10. Counter ElectroMotive Force (abbr.) 11. Type of logic gate (pl.) 12. Releasing volatile products from a liquid coating such as paint 13. Antenna (abbr.) 14. Network configuration type 16. Diode type whose capacitance is electrical joint 22. Part of this website's title 23. Feedback system used to maintain constant level (abbr.) 24. One component of a complex number (abbr.) 25. Solid state power amplifier (abbr.) 27. RF ____, the world's best engineering website 30. Complex Instruction Set Computer 31. Adjust 32. Chemical symbol for terbium 34. Base Station Transceivers (abbr.) 35. Chemical symbol for lawrencium 36. Generated an official engineering change document 39. Pointing device 41. Study for a test just before taking it 42. Mechanical engineering organization (abbr.) 43. Allowance for component tolerances 44. Push to Talk (abbr.) 46. Family of ICs with a certain component density level (abbr.) 48. Highest frequency at which a vertically incident radio wave will return from the ionosphere (2 wds.) Answer below: controlled by a reverse bias 18. Range of frequencies 19. In the same location 21. Specify system parameters 25. Chemical symbol for scandium 26. Unit of time (abbr.) 28. Chemical symbol for argon 29. 1/6 inch printer's measure 33. Light ray 35. Signal amplitude degradation due to inefficiency 37. International Telegraphy and Telephony Consultative Committee 38. Direct Memory Access (abbr.) 39. ELI the ICE ___ 40. One of four lines used in ferrite core memories 44. Ratio of circumference to diameter 45. Semiconductor and calculator company (abbr.) 46. Chemical symbol for lutetium 47. One port of an amplifier 3.Reproduction of this puzzle without the express permission of RF Cafe is prohibited. ACROSS DOWN 1. Decimeter (abbr.) 3. RF signal loss in a transmission line 1. International phonetic alphabet letter "D" (pl.) 9. Indium Gallium Arsenide semiconductor (abbr.) 13. 1/6 inch printer's measure 14. CDMA Development Group (abbr.) 15. Type of current 17. File name extension for an ASCII file 20. Local Oscillator (abbr.) 22. Snail and E are examples of this 24. Key feature in a high level overvoltage protection device 25. Akin to an EE, CE, AE, etc. 27. The "B" in BGA 30. A common battery cell size 31. Chemical symbol for einsteinium 32. Person responsible for program spending (abbr.) 33. Units of current 34. Stock symbol for Advanced Micro Devices 36. Chemical symbol for mercury 37. Chemical symbol for gallium 38. The UK's largest defense electronics contractor (abbr.) 40. Switch type with gauranteed default position 45. Crystal surface 48. Chemical symbol for francium 49. Chemical symbol for argon 50. Transition from solid to liquid phase 51. Type of capacitors 52. Current-voltage phase mnemonic 54. Filter type that blocks lower frequencies (abbr.) 56. Electronics manufacturer with "meatball" logo 57. Common gateway interface (abbr.) 58. Wiring assembly 63. Charged particle 64. Chemical symbol for bromine 65. Analog-to-Digital (abbr.) 67. Used to remove oxidation during soldering 69. Band between RF and BB 70. Software engineering tool (abbr.) 71. Geometric entity with only length 2. Unit of length (abbr.) 4. High-speed logic family 5. Graphics workshop software 6. Mass unit (abbr.) 7. Chemical symbol for gadolinium 8. Electronic warfare defense (abbr.) 10. High frequency semiconductor (abbr.) 11. MS's server-side script engine for dynamically-generated web pages (abbr.) 12. Type of current flow (abbr.) 16. Electronics Industry Association (abbr.) 18. Circuit makers 19. Nuclear explosion byproduct harmful to electronic (abbr.) 21. Chemical symbol for aluminum 23. Mathematical transform for going between frequency and time domains 24. He developed a "counter" for measuring radiation levels 26. BS__ - the degree held by many RF Cafe visitors 28. Chemical symbol for arsenic 29. Be behind in phase 32. Mr. Piper's famous yellow airplane 35. Ham abbreviation for "distant station" 36. One type of filter construction used in the 500 MHz to 1.5 GHz range 39. Scheme to maintain proper frequency (abbr.) 40. Is not passing electrical test 41. Flash caused by an electric current ionizing a gas or vapor 42. Filter type that blocks upper frequencies (abbr.) 43. Unit of current 44. Chemical symbol for iron 46. European equivalent to the U.L. 47. Type of modulation (abbr.) 53. Engineering Change Notice (abbr.) 55. A BPF specification (abbr.) 56. Image file format name extension 58. Chemical symbol for copper 59. Leaded component type 60. Chemical symbol for lithium 61. Discipline for aircraft navigation in 73. Opposite of O.D. 75. A common RS-232 serial bus command (abbr.) 76. Chemical symbol for chlorine 78. Once around a circuit 79. Chemical symbol for krypton 80. ______ House, technical book publisher 81. Northern lights - Aurora ... 82. Chemical symbol for magnesium Answer below: low visibility environments (abbr.) 62. Mr. Ohm's first name 64. One port on a BJT 66. SIP x 2 68. 30 kHz to 300 kHz 70. Logic gate output configuration (abbr.) 72. Engineering Change Order (abbr.) 74. Printer resolution abbreviation 75. Chemical symbol for chromium 77. Chemical symbol for lawrencium 78. Chemical symbol for lanthanum 79. Unit of length (abbr.)