RF Cafe Engineering & Science Crossword Puzzle
April 28, 2019

Since 2000, I have been creating custom technology-themed crossword puzzles 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 April 28, 2019 - RF Cafe

1. An abrupt change in a parametric value (pl.)

14. Network configuration type

15. Readability, Signal, and Tone (QoS report type)

16. RF ____, the world's best engineering website

18. Part of this website's title

20. "Texting" (abbr.)

21. Personal Digital Cellular

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

23. Chemical symbol for lutetium

24. Original Equipment Manufacturer (abbr.)

28. Type of e-mail address system (abbr.)

29. Electronic component package type (abbr.)

30. A compiler directive

33. Elementary particle

35. The design component of total product cost (abbr.)

36. Official Space Shuttle designation (abbr.)

37. Miniature threaded RF connector (pl.)

38. Automatic Packet Position Reporting System (abbr.)

39. Precision approach radar (abbr.)

40. Chemical symbol for molybdenum

42. Units of current

44. Unit of inductance (abbr.)

45. Temporary Engineering Change document (abbr.)

47. A common battery cell size

48. Chemical symbol for strontium

49. Aircraft navigation system (abbr.)

51. In geometry, what is a figure having ten straight sides called

52. Navigational device that measures star positions

53. Peripheral Component Interface (abbr.)

54. Part of a FOR loop

56. Chemical symbol for polonium

57. Original Equipment Manufacturer (abbr.)

58. 30 kHz to 300 kHz

60. Tom _______, "High Frequency Electronics" magazine editor (c2014)

62. Type of logic gate

63. Powers pneumatic devices

65. Shorthand for electronic magazine

66. Battery cell chemistry type (abbr.)

68. Digital storage oscilloscope (abbr.)

69. Temporary Engineering Change document (abbr.)

70. Form a resistor lead

71. Society of Civil and Structural Engineers (abbr.)

72. Digital pattern coding type

73. Precision landing system (abbr.)

75. 24 hours

76. Opposite of I.D.

77. The system than converts common website names to IP addresses (abbr.)

79. Low Noise Amplifier (abbr.)

81. BlackBerry or Palm for example (abbr.)

83. Chemical symbol for radon

84. One of the W's in WWW

85. Powers pneumatic devices

86. Term used in soldering to describe the condition that occurs when the metals being soldered are hot enough to melt the solder so it flows over the surface

88. Type of source used by a Norton equivalent circuit

2. Network department (abbr.)

3. Official Space Shuttle designation (abbr.)

4. College grounds

5. Type of logic gate (pl.)

6. Total radiated power (abbr.)

7. Integrated Services Digital Network (abbr.)

8. Negative temperature coefficient (abbr.)

9. Multifunctional silicon devices (abbr., pl.)

10. Radio navigation systems

11. Discipline for aircraft navigation in low visibility environments (abbr.)

12. BS__ - the degree held by many RF Cafe visitors

13. Unintentionally impressing a signal on a transmission line

17. Radio receiver scheme which mixes a second frequency (LO) with the incoming radio signals

19. 10E-15 numerical prefix

23. Long Range Aid to Navigation

25. Lowest power level capable of being demodulated (abbr.)

26. Another word for a directional radiating device (2 wds.)

27. What is the study of objects travelling faster than sound

28. Silicon transistor type

31. Miniature threaded RF connector

32. Solid state power amplifier (abbr.)

33. Military Auxiliary Radio System

34. Type of logic gate (pl.)

41. Have a chemically induced effect

43. International phonetic alphabet letter "H"

45. ___/IP scheme for networked connectivity

46. Common gateway interface (abbr.)

49. Variable crystal oscillator (abbr.)

50. Type of data storage IC

55. Used logic gates

56. Part of a male connector (pl.)

59. The "F" in EMF

60. Type of chart

61. "Texting" (abbr.)

62. International phonetic alphabet letter "O"

64. Effective frontal area presented to a microwave interrogation system (abbr.)

65. Type of formation for a pushrod end where it connects to a control arm (hyph., pl.)

67. First lines in software that call external libraries

68. Decibels above or below a dipole antenna (abbr.)

74. Volt, meter, pint, pound, eg.

77. Deutsche Industrie Normenausschuss

78. Adjust a pot

79. Computer communication scheme (abbr.)

80. Flash caused by an electric current ionizing a gas or vapor

81. Abbreviation for "power"

82. Automated Test Equipment (abbr.)

84. Write-Once (abbr.)

87. Chemical symbol for tin

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.

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

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Cruciverbalist:

A cruciverbalist is a person who is skilled at creating or solving crossword puzzles. The term is a combination of "cruci-" from "crucifix," meaning cross, and "verbalist" from "verbal," indicating a person who deals with words. cruciverbalists are often responsible for designing crossword puzzles, and they possess a deep knowledge of wordplay, vocabulary, and the techniques used in constructing and solving crosswords. They aim to make puzzles that are both challenging and enjoyable for crossword enthusiasts.