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RF Cafe Engineering & Science Crossword Puzzle
December 1, 2019

For two decades, I have been creating custom engineering- and science-themed crossword puzzles for the brain-exercising benefit and pleasure of RF Cafe visitors who are fellow cruciverbalists. This December 1, 2019, puzzle uses as part of its grid the common schematic symbol for a MOSFET dual gate, n-channel, depletion mode transistor. A database of thousands of words is used which I have 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. 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.

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 December 1, 2019 - RF Cafe 

<click for full size to print>

1. Crude circuit prototype made of discrete components

8. Point in an revolving object's orbit that is farthest to the body it is orbiting

13. Switch position

14. Amateur Radio Direction Finding (abbr.)

15. Semiconductor On Insulator (abbr.)

16. Airport Surveillance Radar (abbr.)

17. Science of light transmission

19. Geometrical figure defined as a curve in which every point is equidistant from a fixed point

20. Chemical symbol for argon

21. A keyboard key

23. One type of electron spin

25. Cable manufacturer with HQ in Richmond, IN

30. Official Space Shuttle designation (abbr.)

31. Logic family

32. Computer messaging service

33. Unix, Linux or Windows (abbr.)

34. Described by a 1st-order equation

35. Ham's code for "Shall I increase power?"

36. Created an impenetrable physical barrier

41. Satellite TV system

42. Army-Navy specification prefix

43. Device for matching antenna impedance to transmitter impedance

44. Test equipment (abbr.)

46. Mass unit (abbr.)

47. Chemical symbol for erbium

48. Video Graphics Array (abbr.)

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

53. Mr. de Forest's first name

55. Weatherproof cover for a radar antenna

57. Slang for when a professor hints at an exam problem (abbr.)

59. 1E6 nanoseconds

60. Programmable logic device (abbr.)

61. A common RS-232 serial bus command (abbr.)

62. Chemical symbol for einsteinium

63. Miniature RF connector

65. Cooling devices

66. Type of distribution, squared

67. Chemical symbol for rubidium

68. Telex-Over-Radio (abbr.)

69. Part of a male connector (pl.)

72. Its chemical symbol is Na

77. Output intercept point (abbr.)

79. Electrical safety organization (abbr.)

81. What kind of nuclear reaction powers both the sun and a hydrogen bomb

83. Satellite TV system

84. On-the-air meeting of hams at a set time, day and radio frequency

85. That which has mass and occupies space (pl.)

86. Sets a steady-state voltage reference

1. Transmitted a signal

2. End of transmission (abbr.)

3. Negatively charged ions

4. Lowest range of system frequencies

5. Type of logic gate

6. Type of data conversion device (abbr.)

7. Radio frequency interference (abbr.)

8. Online service

9. Type of chart

10. Hydrogen, argon, neon, xenon, etc.

11. Chemical symbol for einsteinium

12. Cell phone manufacturer

15. Chemical symbol for scandium

18. Type of data storage IC (abbr.)

22. What a capacitor is used for regarding energy

24. Write-Once (abbr.)

25. 10 decibels (pl.)

26. Electromagnetic interference (abbr.)

27. PCB metal area where component leads attach

28. Thread cutting tools

29. Polymer having the elastic properties of natural rubber

37. Galilean moon

38. Army-Navy specification prefix

39. Puts on an even plane

40. Unit of energy

45. Exalted-Carrier Single Sideband (abbr.)

46. An electron tube in which bunching of electrons is produced by electric fields, used in radars & microwave ovens (pl.)

49. Horizontal Cartesian coordinate

50. Type of high frequency circuit substrate (abbr.)

51. Receiver power level circuitry (abbr.)

54. Hides data within a message

56. ELI the ICE ___

58. Ham's code for "What is your location?"

64. Chemical symbol for molybdenum

65. Name of the fixed point from which the distances to any point on a parabola are connected by a linear relation

70. Bands between RF and baseband

71. Mate to a bolt

72. System On Chip

73. Exponent that returns the original number

74. Opposite of O.D.

75. Popular computer device interface (abbr.)

76. Degree of IC sophistication (abbr.)

78. U.K. equivalent of the IEEE

80. Chemical symbol for lutetium

82. One port of an amplifier

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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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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