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RF Cafe Science & Engineering Crossword Puzzle
April 26, 2020

This April 26, 2020, tech-themed crossword puzzle is bigger than most, figuring that unfortunately many people have more time to kill due to the situation described in the sentence formed by 5 Down, 8 Down, 44 Down, 74 Down, 77 Down, and 80 Down. Otherwise, i contains only clues and terms associated with engineering, science, physical, astronomy, mathematics, chemistry, etc., which I have personally built over nearly two decades. 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 26, 2020 - RF Cafe 

<click for full size to print>

1. BlackBerry or Palm for example (abbr.)

4. NIST radio station (broadcasts time signals)

7. A star that suddenly becomes much brighter and then gradually returns to its original brightness over a period of weeks to years

10. Resistive component of a capacitor's lumped element model (abbr.)

13. Dimension, with units

14. Chemical symbol for europium

15. Band between RF and BB

16. Acronym for the U.S. EPA standards imposed on automobile manufacturer vechile emissions

18. Schema for computer or device presentation to the operator (abbr.)

19. It can follow an MS

21. Gun safety and education organization (abbr.)

22. 30 kHz to 300 kHz

23. 36 in. (abbr., pl.)

25. Powers pneumatic devices

27. Minutes of Use (abbr.)

29. A keyboard key

30. It connects the software to the hardware

32. Mate a plug to a jack

35. Fraction of incident light or radiation reflected by a surface or body

38. A type of digital modulation (abbr.)

40. Web's most popular radio frequency engineering site (2 ltrs. + 1 wd.)

43. The "V" in VLF

44. Unit of luminosity

48. Another name for a test lead

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

50. Move in a raster pattern

52. Asynchronous Communication Interface Adapter (abbr.)

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

56. Product of force x distance from a point (pl.)

59. Soaks up RF energy

62. Front end of a rocket

63. Electromagnetic (abbr.)

64. Morse Code for "from"

65. Volts divided by resistance

66. Insert a doping ion into a semiconductor lattice

70. Abruptly limited the amplitude of a signal

74. Morse Code for "from"

76. Another word for each complete winding of an inductor

78. International phonetic alphabet letter "E"

79. Chemical symbol for helium

81. Nuclear explosion byproduct harmful to electronic (abbr., pl.)

84. Negative terminal

87. 2/3 of a triac

89. Use the wheel on a mouse

92. Peak envelope power (abbr.)

93. Manned rocket series that went to the moon

95. Plasma atmosphere layer of the sun

98. Greek mathematician who wrote the book "Elements of Geometry"

101. Angular speed unit

103. Intermodulation distortion (abbr.)

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

105. Greek letter

106. A common battery cell size

108. ___-AZIMUTH telescope mount

109. Low Noise Amplifier (abbr.)

111. Chemical symbol for calcium

112. 36 inches

114. Test equipment (abbr.)

117. Coefficient of temperature (abbr.)

118. Color code for "9"

120. Family of ICs with a certain component density level (abbr.)

121. BlackBerry or Jordana for example (abbr., pl.)

122. Volt, meter, pint, pound, eg.

123. Adjust a pot

1. Ratio of circumference to diameter

2. 1/4-turn fastener

3. Anatech Electronics Inc., (abbr.)

4. Wired Equivalent Privacy (abbr.)

5. 5 Down + 8 Down + 44 Down +74 Down + 77 Down + 80 Down, a message about current worldwide shutdowns.

6. Chemical symbol for beryllium

7. Chemical symbol for neon

8. 5 Down + 8 Down + 44 Down +74 Down + 77 Down + 80 Down, a message about current worldwide shutdowns.

9. Colorado Springs military school (abbr.)

10. High-speed logic family

11. Fail-____ switch

12. __ engineering, what many visitors of the 40 Across website do

13. Radio signal that is reflected back to earth from one of the layers of the ionosphere (2 wds.)

17. Goes beyond published limits

20. Singulated piece of IC wafer

21. Negation prefix

24. Semiconductor lamp

26. RF computer network

27. International phonetic alphabet letter "M"

28. Notch type filter (abbr.)

30. Send Morse Code

31. Read-only (abbr.)

33. Chemical symbol for erbium

34. ___/IP scheme for networked connectivity

36. Mr. de Forest's first name

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

39. Synchronous Digital Hierarchy

41. Chemical symbol for argon

42. Wireless transmitting device that opens a car door remotely

44. 5 Down + 8 Down + 44 Down +74 Down + 77 Down + 80 Down, a message about current worldwide shutdowns.

45. RF radiating structure

46. Named a software object

47. Automatic Calibration System (abbr.)

50. Type of component package (abbr.)

51. European equivalent to the U.L.

53. Galilean moon

54. Chemical symbol for argon

56. Degree of IC sophistication (abbr.)

57. Original Equipment Manufacturer (abbr.)

58. Surface Mount Technology

59. Type of data conversion device (abbr.)

60. The UK's largest defense electronics contractor (abbr.)

61. Electronic component package type (abbr.)

67. Chemical symbol for platinum

68. Chemical symbol for lutetium

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

71. Current-voltage phase mnemonic

72. Unit of inductance (abbr.)

73. Chemical symbol for polonium

74. 5 Down + 8 Down + 44 Down +74 Down + 77 Down + 80 Down, a message about current worldwide shutdowns.

75. Science of assuring operation amid dense EM background noise (abbr.)

77. 5 Down + 8 Down + 44 Down +74 Down + 77 Down + 80 Down, a message about current worldwide shutdowns.

79. The computer in 2001: A Space Odyssey

80. 5 Down + 8 Down + 44 Down +74 Down + 77 Down + 80 Down, a message about current worldwide shutdowns.

82. Chemical symbol for praseodymium

83. System On Chip

85. Attenuator topology (hyph.)

86. Circuit path with very high or infinite impedance

87. U.S. military organization (abbr.)

88. S12 or S21 (abbr.)

90. Numerical basis for decibels (abbr.)

91. Chemical symbol for lawrencium

93. Chemical symbol for aluminum

94. Type of chart

96. Used lubricant

97. Nordic Mobile Telephone

99. Internet address (abbr.)

100. 10E-2 numerical prefix

102. Military Auxiliary Radio System

105. ____ earth elements

107. Ticker symbol for Analog Devices

108. Test document for verifying proper function (abbr.)

110. Logic family

111. Metric system (abbr.)

113. Chemical symbol for aluminum

115. Network department (abbr.)

116. Greek letter used for frequency

119. PC follower

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.

2024 | 2023 |2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 | 2014 | 2013 | 2012 | 2011 | 2010 | 2009 | 2008 | 2007 | 2006 | 2005 | 2004 | 2003 | 2002 | 2001 | 2000 | Sudoku


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.

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Engineering & Science Crossword Solution April 26 - RF Cafe

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