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RF Cafe Engineering & Science Crossword Puzzle
July 21, 2019

Unlike all of the other engineering and science-themed crossword puzzles I have ever seen, every word and clue - without exception - in these RF Cafe puzzles has been personally entered into a very large database of relevant terms. The list has been built over nearly two decades of creating these crossword puzzles. Let me know if you would like a custom crossword puzzle built for your company, school, club, etc. (no charge). These custom-made engineering and science-themed crossword puzzles are done weekly for the brain-exercising benefit and pleasure of RF Cafe visitors who are fellow cruciverbalists. The jury is out on whether or not this type of mental challenge helps keep your gray matter from atrophying in old age, but it certainly helps maintain your vocabulary and cognitive skills at all ages. A database of thousands of words has been built up over the years and contains only clues and terms associated with engineering, science, physical, astronomy, mathematics, chemistry, etc.

cruciverbalist: [noun] cruci- ("cross") +‎ verbal ("words") +‎ -ist ("agent, person") -- A person who constructs or works crosswords.

Reproduction of this puzzle without the express permission of RF Cafe is prohibited.
acr. = acronym, abbr. = abbreviation, pl. = plural, wds. = words

	1. The "F" in CFL bulbs 2. One component of a complex number (abbr.) 3. Exactly the same in mathematics 4. Switch position 5. Chemical symbol for tantalum 6. Stock symbol for Linear Technologies 9. Early instrument for measuring the positions of the heavenly bodies 11. Unit of time (abbr.) 15. Chemical symbol for mercury 16. Logarithmic reflectivity unit 17. Stock symbol for Boeing 19. Type of logic gate (pl.) 20. 1,000 seconds (abbr.) 22. Test point (abbr.) 24. 10E1 numerical prefix 26. A common battery cell size 27. ELI the ICE ___ 28. Using air pressure as power 29. Type of data conversion device (abbr., pl.) 32. JavaScript (abbr.) 34. Chemical symbol for selenium 36. PhD 38. Chemical symbol for antimony 40. Unit of weight 43. Greek letter 45. Time delay (abbr.) 46. Science of assuring operation amid dense EM background noise (abbr.) 48. What is the measure of heat intensity called 49. An area of poor radio communication, too distant for ground wave and too close for sky waves (2 wds., pl.) 50. Weight (abbr.) 51. European Telecommunications Standards Institute (abbr.) 53. Chemical symbol for arsenic 55. Unit of capacitance (abbr.) 57. Deutsche Industrie Normenausschuss 62. Read-only (abbr.) 63. Chemical symbol for palladium 64. A common battery cell size 65. Type of current 67. Chemical symbol for erbium 68. Modulation technique (abbr.) 72. Small unit of capacitance (abbr.) 73. Crystal face 74. Chemical symbol for europium 75. Length times width 78. Chemical symbol for lawrencium 82. Greek letter (micro) 83. Chemical symbol for gold 85. Chemical symbol for europium
ACROSS
1. Slang for an electronic 86 Across (2 wds.) 7. Equalizer (abbr.) 8. 1e-6 mA 10. One type of electron spin 12. Unit of time (abbr.) 13. Units of heat 14. Workplace safety group (abbr.) 16. Logarithmic ratio (abbr.) 18. The "G" in GPS 20. Chemical symbol for krypton 21. Radio signals from the cosmos (abbr.) 23. Return-to-Zero (abbr.) 24. Digital storage oscilloscope (abbr.) 25. Send junk e-mail 28. BlackBerry or Palm for example (abbr.) 30. A common battery cell size 31. Rádio Nacional de Angola (abbr.) 32. Intel x86 command for " jump if above" 33. Chemical symbol for einsteinium 35. Chemical symbol for neodymium 37. Exalted-Carrier Single Sideband (abbr.) 39. On-the-air meeting of hams at a set time, day and radio frequency 41. Popular computer device interface (abbr.) 42. Optical cross-connect (abbr.) 44. Type of aircraft dope	47. Time Division Multiplexing 50. BER, 8 bits at a time 52. Software engineering tool (abbr.) 54. Runge-_____ method in differential equations 56. Chemical symbol for cadmium 58. Type of component package (abbr.) 59. Band between RF and BB 60. Official Space Shuttle designation (abbr.) 61. Infrared (abbr.) 63. Type of chart 64. Positive electrode 66. One system's phonetic letter "z" 68. Last stage in a transmitter (abbr.) 69. Chemical symbol for chromium 70. Type of logic gate 71. Web's most popular radio frequency engineering site (2 ltrs. + 1 wd.) 76. Type of modulation (abbr.) 77. Automated universal inductance tester - watch that 3rd letter, (abbr.) 79. Antenna radiated power measurement (abbr.) 80. Chemical symbol for scandium 81. Chemical symbol for ruthenium 82. 1/000 of an amp (abbr.) 84. BS__ - the degree held by many RF Cafe visitors 86. The Brits call it a valve (2 wds.)

See solution below

2019 Crossword Puzzle Archive

Take a well-deserved break and try your hand at some of these goodies. Every word in the RF Cafe crossword puzzles is specifically related to engineering, mathematics, and science. There are no generic backfill words like many other puzzles give you, so you'll never see a clue asking for the name of a movie star or a mountain on the Russia-China border.

RF Cafe Engineering & Science Crossword Puzzle July 21, 2019

RF Cafe Engineering & Science Crossword Puzzle
July 21, 2019