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RF Cafe Engineering & Science Crossword Puzzle
December 29, 2019

This week's puzzle features a special end-of-the decade message, comprised of three words and clues, for RF Cafe visitors. As with my hundreds of previous engineering and science-themed crossword puzzles, this one contains only clues and terms associated with engineering, science, physical, astronomy, mathematics, chemistry, etc., which I have built up 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 December 29, 2019 - RF Cafe 

<click for full size to print>

ACROSS DOWN
1. Vacuum tube element that generates free electrons for current flow
5. German physicist after whom the uncertainty principle is named
12. PC follower
13. Chemical symbol for aluminum
15. 300 Hz to 3 kHz in audio (abbr.)
16. Mr. de Forest's first name
17. Computer monitor resolution measure (abbr.)
18. BS__ - the degree held by many RF Cafe visitors
20. Atmospheric condensation cool surfaces
21. Digital voltmeter (abbr.)
23. Attenuator (pl.)
25. Lights
28. CB slang for CB radio or antenna
29. Ham-ese for Young Lady
30. Telex-Over-Radio (abbr.)
31. Run through compliance testing
33. Nikola _____
35. Stock symbol for Lockheed Martin
36. Radio Direction Finding (abbr.)
38. Chemical symbol for radium
39. Logarithmic ratio (abbr.)
41. Opposite of a LO
42. Online auction site
44. Thin layer of material deposited a surface
45. Internet protocol (abbr.)
46. Unit of frequency (archaic, abbr.)
47. Chemical symbol for terbium
48. The cell band above DCN
50. Innovative Power Products, Holbrook, NY (abbr.)
52. Microprocessor vendor
55. Mated to a receptacle
56. Permeability-tuned oscillator (abbr.)
57. Modulation type (abbr.)
59. With 38 Down, this website's title
61. Effect (named after its discoverer) that is the variation in the width of the base in a BJT due to a variation in the applied base-to-collector
63. The Brits call it a valve
65. Stock symbol for Raytheon
66. End of Life (abbr.)
67. Chemical symbol for gold
68. Akin to EEs, CEs, AEs, etc. (abbr., pl.)
69. Electromagnetic interference (abbr.)
70. Unit of inductance (abbr.)
72. Chemical symbol for strontium
73. Army-Navy specification prefix
74. Determined the similarity of two waveforms as a function of a time
75. Software device for tracking elapsed time (pl.)
1. _____ + 9 Down + 14 Down!
2. Radio signals from the cosmos (abbr.)
3. Transformer interwinding connections
4. Voltage-current phase mnemonic
6. 1.602E-19 Joules
7. Band between RF and BB
8. Form of energy involving the flow of electrons
9. 1 Down + ___ + 14 Down!
10. Chemical symbol for beryllium
11. An abbreviation for "receiver"
14. 1 Down + 9 Down + ____!
17. Chemical symbol for palladium
19. Electromagnetic (abbr.)
21. 24 hours
22. Degree of IC sophistication (abbr.)
24. Brightest star in the Aquila constellation
25. Inductor inserted into antenna element to increase the effective electrical length (2 wds.)
26. Modulation technique (abbr.)
27. Adjust a pot
28. The "E" in FET
30. Chemical symbol for thallium
32. Opposite of O.D.
34. Measure a waveform at regular intervals
37. Powerful mathematics software used by engineers
38. With 59 Across, this website's title
40. Filter type that blocks frequencies below and above a specified band (abbr.)
41. 1/100 meter (abbr.)
43. Chemical symbol for ytterbium
49. Chemical symbol for copper
50. U.K. equivalent of the IEEE
51. BlackBerry or Palm for example (abbr.)
53. Chemical symbol for nobelium
54. Special diode type that can be switched (abbr.)
55. Circuit for firing a radar magnetron (abbr.)
56. Mate to a socket
58. A type of average (pl.)
60. Prefix for 10E-18
62. Chemical symbol for radium
63. Short for terminal
64. Unit of time (abbr.)
66. Using the moon as a passive reflector to establish a signal path; moonbounce (abbr.)
68. Degree of IC sophistication (abbr.)
69. Chemical symbol for erbium
70. Unit of length (abbr.)
71. Chemical symbol for helium
73. Chemical symbol for argon

See solution below

 

2019 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.

2020 | 2019 | 2018 | 2017 | 2016 | 2015 | Sudoku

December 29

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December 15

December 8

December 1

November 24

November 17

November 10

November 3

October 27

October 20

October 13

October 6

September 29

September 22

September 15

September 8

September 1

August 25

August 18

August 11

August 4

July 28

July 21

July 14

July 7

June 30

June 23

June 16

June 9

June 2

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May 19

May 12

May 5

April 28

April 21

April 14

April 7

March 31

March 24

March 17

March 10

March 3

February 24

February 17

February 10

February 3

January 27

January 20

January 13

January 6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Engineering & Science Crossword Solution December 29, 2019 - RF Cafe

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

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