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Kirt Blattenberger - RF Cafe Webmaster

Copyright: 1996 - 2024
    Kirt Blattenberger,


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 typing up your telephone line, and a nice lady's voice announced "You've Got Mail" when a new message arrived...

All trademarks, copyrights, patents, and other rights of ownership to images and text used on the RF Cafe website are hereby acknowledged.

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RF Cafe Engineering & Science Crossword Puzzle
December 23, 2018

Each week, for the sake of all avid cruciverbalists amongst us, I create a new technology-themed crossword puzzle using only words from my custom-created lexicon related to engineering, science, mathematics, chemistry, physics, astronomy, etc. This week's puzzle contains a special holiday message (colored clues) to all RF Cafe visitors. You will never find among the words names of politicians, mountain ranges, exotic foods or plants, movie stars, or anything of the sort. You might, however, see someone or something in the exclusion list who or that is directly related to this puzzle's theme, such as Hedy Lamarr or the Bikini Atoll, respectively. Enjoy!

cruciverbalist: [noun]  cruci- ("cross") +‎ verbal ("words") +‎ -ist ("agent, person") -- A person who constructs crosswords.

Reproduction of this puzzle without the express permission of RF Cafe is prohibited.
acr. = acronym, abbr. = abbreviation, pl. = plural, wds. = words

RF Cafe Engineering & Science Crossword Puzzle December 23, 2018

1. Electrical safety organization (abbr.)
3. Lowest ranges of system frequencies
9. Chemical symbol for chromium
11. Point of rotation
12. The largest asteroid
13. ___/IP scheme for networked connectivity
16. File name extension for an ASCII file
17. Form of energy arising from the kinetic energy of atoms and molecules
18. Boolean expression (pl.)
20. A common battery cell size
21. Switch position
23. Last stage in transmitter (abbr., pl.)
25. Chemical symbol for radon
26. Internet protocol (abbr.)
27. What kind of a number is divisible only by itself and 1
29. Negatively doped silicon
31. Stock symbol for Yahoo
34. _____ + 79 Across and a 17 Down + 22 Down + 30 Down from RF Cafe!
36. PCB metal area where component leads attach
38. Low- to mid- frequency RF connector
39. Base Station Transceivers (abbr.)
40. Effective Radiated Power (abbr.)
41. PC follower
42. BS__ - the degree held by many RF Cafe visitors
43. Chemical symbol for scandium
45. 1e-6 mA
47. 1/000 of an amp (abbr.)
48. Logarithmic ratio (abbr.)
50. Control language used by Hewlett Packard printers, abbr.
52. Things in a bill of material
54. Service-Independent Building Blocks
56. Electromagnetic (abbr.)
57. Chemical symbol for cesium
58. Test point (abbr.)
60. Greek letter
62. Local Oscillator (abbr.)
63. Amateur radio abbreviation for the Oceania region (abbr.)
65. Charged particle
67. International phonetic alphabet letter "U"
70. The cell band above DCN
72. Type of logic gate
73. Network department (abbr.)
74. Chemical symbol for niobium
75. Multifunctional silicon devices (abbr.)
76. Galilean moon
78. Unit of time (abbr.)
79. 34 Across + _________ and a 17 Down + 22 Down + 30 Down from RF Cafe!
84. Chemical symbol for platinum
85. Chemical symbol for erbium
86. Switch position
87. Chemical symbol for mercury
89. One port of an amplifier
90. Army-Navy specification prefix
92. The "O" in VCO (pl.)
93. Shorthand for telecommunications
97. High temperature substrate
101. Ovenized crystal oscillator (abbr.)
102. Agilent's EE design software (abbr.)
103. Time delay (abbr.)
104. Ratio of circumference to diameter
1. One type of electron spin
2. Described by a 1st-order equation
3. Opposite of top
4. System for guiding aircraft (abbr.)
5. Electromagnetic (abbr.)
6. Chemical symbol for silver
7. Cellphone band just below PCS
8. A trigonometry function that is the reciprocal of the cosine
9. Ceramic Dual Inline Package
10. Type of flip-flop
14. Min-to-max voltage of a waveform (abbr.)
15. Automatic network analyzer (abbr.)
16. Chemical symbol for aluminum
17. 34 Across + 79 Across and a _____ + 22 Down + 30 Down from RF Cafe!
19. The scalar component of velocity
22. 34 Across + 79 Across and a 17 Down + ___ + 30 Down from RF Cafe!
23. Moon of Saturn with retrograde orbit
24. Causes circuit path with very low or 0 ohms of impedance
25. Rádio Nacional de Angola (abbr.)
28. Its chemical symbol is Fe
30. 34 Across + 79 Across and a 17 Down + 22 Down + ____ from RF Cafe!
32. Heterojunction Bipolar Transistor
33. Number system which uses only the digits 0 to 7
35. Type of flip-flop
36. Has a positive phase wrt a reference
37. Silicon transistor type (abbr.)
41. Maximum distance in orbit around the sun
42. Inventor of the incandescent light bulb
44. The star Alpha Geminorum
46. Surrounding environmental conditions
47. Chemical symbol for magnesium
49. Chemical symbol for bismuth
51. Related to FM by a differential
53. Chemical symbol for einsteinium
55. Armored cable type
57. Torque transfer mechanism
59. PC Card - with 68 pin interface
61. Chemical symbol for tin
64. Filter type that blocks upper frequencies (abbr.)
66. Path followed by a heavenly body around a star
68. Band between RF and BB
69. Unix, Linux or Windows (abbr.)
71. Connector vendor
75. Small representative graphics
77. International phonetic alphabet letter "O"
80. One component of a complex number (abbr.)
81. Infrared (abbr.)
82. Part of a FOR loop
83. Chemical symbol for manganese
84. Rotated about a point
88. "The father of rocketry"
89. Satellite of Jupiter discovered by Galileo
91. Unit of time (abbr.)
94. End of transmission (abbr.)
95. Imaging device (abbr.)
96. Shorthand for oxygen
98. Chemical symbol for lanthanum
99. User Datagram Protocol
100. Degree of IC sophistication (abbr.)

See solution below


2018 Crosswords 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.

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

December 30
December 23
December 16
December 9
December 2
November 18

August 5
July 29
July 22
July 15
July 8
July 1
June 24
June 10
June 3
May 27
May 20
May 13
May 6

April 29
April 22
April 15
April 8
April 1
March 25
March 18
March 11
February 25
February 18
February 11
February 4
January 28
January 21
January 14
January 7









RF Cafe Engineering & Science Crossword Solution December 23, 2018

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