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RF Cafe Science & Engineering Crossword Puzzle
April 5, 2020

Working crossword puzzles can be contagious. This April 5, 2020, tech-themed crossword puzzle may even go viral. It contains only clues and terms associated with engineering, science, physical, astronomy, mathematics, chemistry, etc., which I have personally built over nearly two decades. That includes the cause for our planet's current dilemma. Many new words and company names have been added that had not even been created when I started in the year 2002. 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 5, 2020 - RF Cafe 

<click for full size to print>

1. Set of three-letter codes which are used by amateurs as abbreviations, hyph.

6. Unlicensed radio type for personal and business use (abbr., pl.)

9. Describes 99 Across

15. Coordinated Universal Time (abbr.)

16. Country of origin for this current 45 Across

18. Official engineering change document (abbr., pl.)

20. Chemical symbol for einsteinium

21. 2-way conversation, Ham term

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

24. Common average used for sinewaves (abbr.)

25. Voltage-Controlled Oscillator (pl.)

26. Part of a FOR loop

28. Data transmission pathway

30. Printer output resolution unit (abbr.)

32. Having power applied (slang)

33. Fast-Scan TV

34. Electronic Variable Optical Attenuator (abbr.)

37. Unit of weight

39. Cause EM signals to disperse randomly

43. Chemical symbol for neon

44. Chemical symbol for lithium

45. Describes a highly infectious agent of destruction like 99 Across

48. Shuttle Amateur Radio EXperiment

50. Chemical symbol for tantalum

52. Akin to an EE, CE, AE, etc.

53. Type of data conversion device (abbr.)

54. Shorthand for oxygen

56. Chemical symbol for praseodymium

57. Online service

59. Logarithmic ratio (abbr.)

62. Chemical symbol for thallium

64. Number that is divisible only by itself and 1

67. Early instrument for measuring the positions of the heavenly bodies

71. Internet protocol (abbr.)

73. 1.602E-19 Joules

74. Introduce unintended amplitude changes

76. Chemical symbol for beryllium oxide

77. Nearest and furthest points to the center of gravitational attraction for a body in orbit

78. RF computer network

79. Exponent that returns the original number

80. Gallium nitride chemical symbol

82. Rádio Nacional de Angola (abbr.)

84. Electrical safety organization (abbr.)

85. Key feature in a high level overvoltage protection device (pl.)

87. Ham's code for "Your net frequency is High."

90. Non-return to zero (abbr.)

91. Automatic network analyzer (abbr.)

92. Filter type that blocks frequencies in a specified band (abbr.)

93. Teflon (abbr.)

95. A sudden and temporary increase in voltage, current, or power

98. Beat frequency oscillator (abbr.)

99. Original name for 19 Down + "-19" (2 wds.)

100. Ham's code for "Shall I send more slowly?"

101. Electromagnetic wavelength unit

1. International phonetic alphabet letter "Q"

2. Official Space Shuttle designation (abbr.)

3. Multifunctional silicon devices (abbr.)

4. Transportation accident investigation agency (abbr.)

5. Chemical symbol for lawrencium

6. Divides the signal into pieces

7. Chemical symbol for bismuth

8. Signal-to-noise ratio (abbr.)

10. Type of current flow (abbr.)

11. Digital Enhanced Cordless Telephone

12. Engineering Change Order (abbr.)

13. Semiconductor device type (abbr.)

14. Network department (abbr.)

16. Error checking scheme (abbr.)

17. Modulation type (abbr.)

19. _____ + "-19"

22. Release volatile products from a liquid coating such as paint

25. Aircraft navigation system (abbr.)

26. Logic family (abbr.)

27. Type of optical network

29. Small DIP package (abbr.)

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

32. Base 16 number system (abbr.)

35. Volt-ohmmeter (abbr.)

36. PC follower

38. Chemical symbol for nobelium

40. A common battery cell size

41. Total radiated power (abbr.)

42. Prefix meaning ground or earth

46. Analog-to-Digital (abbr.)

47. Logical gate type (pl.)

49. ______ + 61 Down, cause of the current global 9 Across

51. Change connector type

55. Transmit Incremental Tuning (abbr.)

57. Automatic Testing, Evaluation & Reporting (abbr.)

58. Local Oscillator (abbr.)

60. Early predecessor to an online forum (abbr.)

61. Submicroscopic infectious agent that replicates only inside the living cells of an organism

63. One component of volume

64. Type of chart

65. Chemical symbol for molybdenum

66. Unit of energy

68. Chemical symbol for antimony

69. Chemical symbol for lanthanum

70. Type of reconfigurable memory (abbr.)

72. Oscillator type that is referenced to an external source (abbr.)

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

75. L-C resonating circuits

79. Circuit path with very high or infinite impedance

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

83. Boolean expression (pl.)

86. Colorado Springs military school (abbr.)

88. Unit of time (abbr.)

89. Stock symbol for Hewlett Packard

92. Beat frequency oscillator (abbr.)

93. Chemical symbol for plutonium

94. Chemical symbol for chlorine

96. Infrared (abbr.)

97. Chemical symbol for tin

98. Filter type that blocks frequencies in a specified band (abbr.)

See solution below


2020 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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