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RF Cafe Christmas Theme Crossword Puzzle
December 20, 2020

Just in time for Christmas - a yuletide crossword puzzle for you to work in the last moments of work while waiting for the boss to give the order to leave early for the long holiday weekend. For the sake of avid cruciverbalists amongst us, each week I create a new crossword puzzle that has a theme related to engineering, mathematics, chemistry, physics, and other technical words. The clues with asterisks (*) are particular to this December 20th Christmas-themed crossword puzzle. As always, it contains no names of politicians, mountain ranges, exotic foods or plants, movie stars, or anything of the sort unless it/he/she is related to this puzzle's technology theme (e.g., Hedy Lamarr or the Bikini Atoll). The technically inclined cruciverbalists amongst us will appreciate the effort. Enjoy!

Reproduction of this puzzle without the express permission of RF Cafe is prohibited.

acr. = acronym, abbr. = abbreviation, pl. = plural, wds. = words

RF Cafe Christmas Theme Crossword Puzzle for December 20, 2020 - RF Cafe

1. Logarithmic ratio (abbr.)

3. The theme of this crossword puzzle *

9. Chemical symbol for radium

11. One axis of an ellipse

12. The stuff in the solder core

13. Broadband Signal Intrusion (abbr.)

16. Type of data conversion device (abbr.)

17. Erbium Doped Fiber Amplifier (abbr.)

18. Transformer interwinding connections

20. Chemical symbol for lithium

21. Filter type that blocks upper frequencies (abbr.)

23. Logic family (abbr.)

25. Chemical symbol for cobalt

26. Chemical symbol for lanthanum

27. Third largest asteroid

29. Color of most of the main object in this crossword matrix *

31. Transportation used by 19 Down *

34. High-speed circuit-switched data (abbr.)

36. Length times width

38. Abbreviation for "power"

39. Using the moon as a passive reflector to establish a signal path; moonbounce (abbr.)

40. Stock symbol for National Semiconductor

41. Part of this website's title

42. 1/000th of a liter (abbr.)

43. Chemical symbol for scandium

45. Internet protocol (abbr.)

47. A measure of receiver quality (abbr.)

48. Chemical symbol for erbium

50. A three-terminal power semiconductor device noted for high efficiency and fast switching (abbr.)

52. Holiday songs sung by 84 Down *

54. A crescent shaped figure formed on a sphere or plane by two intersecting arcs

56. Chemical symbol for neodymium

57. Chemical symbol for silver

58. Infrared (abbr.)

60. Network department (abbr.)

62. Front edge of a wing (abbr.)

63. 1e-6 mA

65. End of transmission (abbr.)

67. Type of ground strap wire

70. Engineering Change Notice (abbr.)

72. Electromagnetic (abbr.)

73. Network department (abbr.)

74. One component of a complex number (abbr.)

75. Analog-to-Digital (abbr.)

76. 10^-18th of a joule (abbr.)

78. Unit of time (abbr.)

79. Address of 17 and 19 Down (2 wds.) *

84. Chemical symbol for calcium

85. Chemical symbol for neon

86. Chemical symbol for tin

87. Chemical symbol for mercury

89. Chemical symbol for argon

90. Unit of time (abbr.)

92. Property of a lens that allows it to focus all wavelengths to the same point

93. Adding a termination

97. High temperature substrate

101. Graphics file extension

102. Greek letter

103. Opposite of O.D.

104. Upper frequency (abbr.)

1. Decimeter (abbr.)

2. Spurious signal produced in a receiver

3. Its chemical symbol is Co

4. Stock symbol for Harris Communications

5. One port of an amplifier

6. Test point (abbr.)

7. Amateur Radio Association (abbr.)

8. The plane figure enclosed by two radii of a circle and the arc between them

9. Periodic superimposed waveform amplitude variation

10. Army-Navy specification prefix

14. Galilean moon

15. Semiconductor device type (abbr.)

16. Decibel (abbr.)

17. Helpers of 19 Down *

19. Jolly old St. Nick *

22. Attenuator

23. Silvery slivers hung on the 3 Across tree *

24. Signal amplitude degradation due to inefficiency (pl.)

25. Early computer display screen resolution (abbr.)

28. Term for asymmetry of a statistical distribution

30. CB slang for CB radio or antenna

32. Filter type that blocks upper frequencies (abbr.)

33. Change from the initial value due to instability

35. Centimeter (abbr.)

36. Heavenly being that announced the birth of 77 Down *

37. Electromagnetic interference (abbr.)

41. Propulsion unit for 19 Down's 31 Across *

42. Delivery room for 77 Down *

44. Trigonometric function equal to the ratio between the side adjacent to a given angle, and the hypotenuse

46. Objects of endearment placed under the 3 Across tree *

47. Chemical symbol for niobium

49. Chemical symbol for ruthenium

51. Chemical symbol for gadolinium

53. 1.602E-19 Joules

55. Chemical symbol for nickel

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

59. Line extending out from center

61. Radio signals from the cosmos (abbr.)

64. Chemical symbol for selenium

66. Greek letter used for resistance

68. Chemical symbol for silver

69. Morse Code for "from"

71. Connector vendor

75. Association of North American Radio Clubs

77. He is the reason for the season *

80. Chemical symbol for radon

81. Test equipment (abbr.)

82. Unit of time (abbr.)

83. Switch position

84. A roaming person who sings 52 Across *

88. Shiny strings of 23 Down strung across the fireplace mantel *

89. A common battery cell size

91. Type of component package (abbr.)

94. Antenna gain unit (abbr.)

95. Intermodulation distortion (abbr.)

96. Chemical symbol for neptunium

98. Chemical symbol for lawrencium

99. 300 MHz to 3 GHz

100. Minutes of Use (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.

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.

December 27

December 20

December 13

December 7

November 29

Thanksgiving Day

November 22

November 15

November 8

November 1

October 25

October 18

October 11

October 4

September 27

September 20

September 13

September 6

August 30

August 23

August 16

August 9

August 2

July 26

July 19

July 12

July 5

June 28

June 21

June 14

June 7

May 31

May 24

May 17

May 10

May 3

April 26

April 19

April 12

April 5

March 29

March 22

March 15

March 8

March 1

February 23

February 16

February 9

February 2

January 26

January 19

January 12

January 5
















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