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RF Cafe Engineering & Science Crossword Puzzle
July 7, 2019

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. You will never find a word taxing your knowledge of a numbnut soap opera star or the name of some obscure village in the Andes mountains. You might, however, encounter the name of a movie star like Hedy Lamarr or a geographical location like Tunguska, Russia, for reasons which, if you don't already know, might surprise you.

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

Engineering & Science Crossword Puzzle July 7, 2019 - RF Cafe

<click for full size to print>

1. Equation

5. 2 Down + _______ + 13 Down + 15 Down spreadsheet, which performs 10 Down*

9. Greek letter

11. Switch position

12. Conductor size unit (abbr.)

14. Relative power level unit (abbr.)

17. Unit of inductance (abbr.)

18. Beat frequency oscillator (abbr.)

19. Hydrogen, argon, neon, xenon, etc.

20. Ovenized crystal oscillator (abbr.)

22. System for underwater navigation (pl.)

25. Masses

27. Chemical symbol for scandium

28. Unit of frequency (archaic, abbr.)

29. Key feature in a high level overvoltage protection device

30. Chemical symbol for berkelium

31. Chemical symbol for thallium

32. Unit of frequency (archaic, abbr.)

34. Chemical symbol for ruthenium

36. Multifunctional silicon devices (abbr.)

38. Radio signals from the cosmos (abbr.)

40. Chemical symbol for silicon

41. European equivalent to the U.L.

42. Software object reference name

43. Software engineering tool (abbr.)

44. Type of chart use for project planning

45. Electrical safety organization (abbr.)

48. Chemical symbol for radon

50. Unit of apparent power (abbr.)

51. Type of flip-flop

52. Chemical symbol for chlorine

54. Unix, Linux or Windows (abbr.)

55. Semiconductor and calculator company (abbr.)

57. Unit of length (abbr.)

58. 30 Hz to 300 Hz

59. Opposite of I.D.

61. Opposite of O.D.

62. Satellite EHF Communications for Mobile Multimedia

64. Large loudspeaker designed primarily to reproduce low frequency audio signals

67. Electronics Industry Association (abbr.)

68. Plane circular area (pl.)

69. Maximum Usable Frequency

70. Internet protocol (abbr.)

71. Cellphone band directly above DCS

73. Semiconductor device type (abbr.)

74. Unit of length (abbr.)

76. Designation for a DoD-defined component or system (hyp.)

80. Grouping of wires or cables

81. Code used for automating software tasks

1. What current is said to do (pl.)

2. __ + 5 Across + 13 Down + 15 Down spreadsheet, which performs 10 Down*

3. Numerical basis for decibels (abbr.)

4. Modulation type (abbr.)

5. Chemical symbol for cobalt

6. Type of logic gate

7. A common battery cell size

8. Reflected radar or sonar signal (pl.)

10. Mathematical calculation of RF component string (2 wds.)

12. Colorado Springs military school (abbr.)

13. 2 Down + 5 Across + ____ + 15 Down spreadsheet, which performs 10 Down*

15. 2 Down + 5 Across + 13 Down + ____ spreadsheet, which performs 10 Down*

16. Imaging device (abbr.)

18. Low- to mid- frequency RF connector

21. Transmit Incremental Tuning (abbr.)

23. Generate a periodic signal

24. Special diode type that can be switched (abbr.)

25. Largest broadcaster in the UK (abbr.)

26. Electrical terminal, normally left unconnected at one end

32. 1E6 nanoseconds

33. Constellation : The scales

35. Unit of time (abbr.)

36. Band between RF and BB

37. Opposite of a source (pl.)

39. Test equipment (abbr.)

45. PCB mask exposing ray (abbr.)

46. JavaScript (abbr.)

47. Amateur radio abbreviation for the Oceania region (abbr.)

49. Unit of time (abbr.)

51. Common average used for sinewaves (abbr.)

53. The "L" in VLF

56. Current-voltage phase mnemonic

57. Million multiply accumulate operations (abbr.)

60. Weatherproof cover for a radar antenna

61. Type of secondary radar system (abbr.)

62. Type of chart used to plot immittance

63. Output intercept point (abbr.)

65. One port of an amplifier

66. Increases voltage linearly

72. "Texting" (abbr.)

73. U.S. Spectrum allocation agency

75. Chemical symbol for strontium

77. Network department (abbr.)

78. Chemical symbol for einsteinium

79. One type of electron spin

See solution below


2019 Crossword Puzzle Archive

Visit the Crossword Express website - RF CafeTake 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.

All of these crossword puzzles were created using the fabulous Crossword Express (now called "Magnum Opus") software.

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Engineering & Science Crossword Solution July 7, 2019 - RF Cafe

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    Kirt Blattenberger,


RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while tying up your telephone line, and a nice lady's voice announced "You've Got Mail" when a new message arrived...

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