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RF Cafe Engineering & Science Crossword Puzzle
March 24, 2019

Since 2000, I have been creating custom technology-themed crossword puzzles for the brain-exercising benefit and pleasure of RF Cafe visitors who are fellow cruciverbalists. The jury is out on whether or not this type of mental challenge helps keep your gray matter from atrophying in old age, but it certainly helps maintain your vocabulary and cognitive skills at all ages. A database of thousands of words has been built up over the years and contains only clues and terms associated with engineering, science, physical, astronomy, mathematics, chemistry, etc. 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

RF Cafe Engineering & Science Crossword Puzzle March 24, 2019

1. High electron mobility transistor
5. Common use for a capacitor
11. Voice of America
12. Resistive component of a capacitor's lumped element model (abbr.)
14. Battery cell chemistry type (abbr.)
16. Ham's code for "What is the name of your station?"
18. Chemical symbol for tantalum
19. Compliment to a zero in a polynomial
20. Typically 300 Hz to 5 kHz audio frequency (pl.)
23. The shortest-duration modulation state in a spread spectrum system
24. Make and break circuits
26. Type of data conversion device (abbr., pl.)
27. Aircraft navigation system (abbr.)
29. Continuous Tone Coded Squelch System (abbr.)
30. Chemical symbol for silicon
31. Semiconductor lamp
33. Filter type that blocks frequencies in a specified band (abbr.)
36. Fraction of incident light or radiation reflected by a surface or body
38. Type of logic gate
40. Unit of capacitance (abbr.)
41. Chemical symbol for plutonium
42. Chemical symbol for xenon
43. What is the study of objects travelling faster than sound
45. Chemical symbol for aluminum
46. Galilean moon
47. European equivalent to the U.L.
48. Unit of atmospheric pressure (abbr.)
49. One tier of a PCB (pl.)
51. Chemical symbol for einsteinium
52. Design for Manufacturability (abbr.)
53. Coefficient of temperature (abbr.)
55. Thin metallic shield material around coax cable (pl.)
59. Science of assuring operation amid dense EM background noise (abbr.)
61. BASIC program command
63. The most common conductor metal
64. European Telecommunications Standards Institute (abbr.)
65. X-ray film image (pl.)
67. Microwave Theory and Techniques Society (abbr.)
69. Type of current flow (abbr.)
70. Opposite of USB
71. Set of poles
72. Voltage-current phase mnemonic
75. 1/000 of an inch
77. Geometrical name for a three dimensional solid having eight plane faces
78. Official engineering change document (abbr., pl.)
2. 1.602E-19 Joules
3. Isolated charges
4. Loose end of a cable
6. BS__ - the degree held by many RF Cafe visitors
7. Chemical symbol for cesium
8. Path followed by a heavenly body around a star (pl.)
9. Constellation : The lyre
10. Founder of the ARRL (2 wds.)
13. Meet all test requirements
15. Akin to an EE, CE, AE, etc.
16. Ham's code for "Does my frequency vary?"
17. Boolean expression (pl.)
18. Temporary Engineering Change document (abbr.)
19. Peak Inverse Voltage
20. Controlled impedance transmission line on a substrate (pl.)
21. Cellphone band just below PCS
22. Ratio of output to input power, voltage, current, light, etc.
24. Chemical symbol for scandium
25. Weight (abbr.)
28. Remove oxygen from or add hydrogen to a compound
32. Adds an impurity to a semiconductor
33. Assemble
34. Web's most popular radio frequency engineering site (2 ltrs. + 1 wd.)
35. Time duration of an energy signal (2 wds.)
37. Constellation : The lion
38. Gun safety and education organization (abbr.)
39. Type of memory
41. Precision approach radar (abbr.)
44. Equal about an axis
50. Web page language
54. Cause the temperature to drop
55. BASIC looping keyword
56. Configured a switch to break electrical contact
57. Front edge of a wing (abbr.)
58. Chemical symbol for strontium
60. A common RS-232 serial bus command (abbr.)
61. Equipment
62. Optical cross-connect (abbr.)
63. Mr. Piper's famous yellow airplane
66. Solid state power amplifier (abbr.)
67. 1/000 of an amp (abbr.)
68. Considered the 4th dimension
73. Chemical symbol for lawrencium
74. Satellite of Jupiter discovered by Galileo
76. Local Oscillator (abbr.)

See solution below


2019 Crosswords Archive
Visit the Crossword Express website - RF CafeTake a break from the drudgery by trying 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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RF Cafe Engineering & Science Crossword Solution March 24, 2019

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