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

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RF Cafe Science & Engineering Crossword Puzzle
April 12, 2020

Working crossword puzzles can be contagious. This April 12, 2020, tech-themed crossword puzzle may even go viral. It contains only clues and terms associated with engineering, science, physical, astronomy, mathematics, chemistry, etc., which I have personally built over nearly two decades. That includes the cause for our planet's current dilemma. 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 12, 2020 - RF Cafe

1. Bill's famous OS
2. Electrical safety organization (abbr.)
3. Asynchronous Digital Subscriber Line (abbr.)
5. Output intercept point (abbr.)
6. Infrared (abbr.)
7. Reducing in amplitude
11. Device for translating higher frequencies to lower frequencies (sometimes hyphenated, pl.)
12. Device that increase the frequency band of a receiver
14. Cyanide (abbr.)
18. Electromagnetic interference (abbr.)
24. Describes many engineers' current plight worldwide due to 1 Across + 35 Across
25. Satellite of Jupiter discovered by Galileo
31. Electromotive force (abbr.)
32. Rapid variation in the signal strength of a station, usually due to propagation variations
36. 30 kHz to 300 kHz
39. Logical gate type (pl.)
42. Color quality
45. Write-Once (abbr.)
46. Chemical symbol for tantalum










1. _____ + 35 Across is causing many engineers to be 24 Down
4. _____-19, contagion first identified in Wuhan, China
8. S12 or S21 (abbr.)
9. One component of a complex number (abbr.)
10. Chemical symbol for cesium
11. Add an impurity to a semiconductor
13. Type of current
15. Constellation : The lion
16. Type of logic gate
17. Exponent that returns the original number
19. Type of antenna with an element made of a single, flexible rod or tube
20. A type of average
21. Semiconductor On Insulator (abbr.)
22. Number of clock cycles in an event
23. Permeability-tuned oscillator (abbr.)
24. Coordinated Universal Time (abbr.)
26. Current summing point
27. Ad-hoc on demand distance vector (abbr.)
28. Slang for transmitter and/or receiver
29. Last statement in a BASIC program
30. Transistor B-C capacitance
31. 30 Hz to 300 Hz
33. Adjust
34. Real estate where equipment is located
35. 1 Across + ___ is causing many engineers to be 24 Down
37. One port of an amplifier
38. Stock symbol for Raytheon
40. Unit of length (abbr.)
41. Unit of resistance (pl.)
43. Unix, Linux or Windows (abbr.)
44. Modern battlefield technique (abbr.)
46. Test equipment (abbr.)
47. Weatherproof cover for a radar antenna (pl.)
48. International phonetic alphabet letter "O"

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.

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Thanksgiving Day

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Engineering & Science Crossword Solution April 12 - RF Cafe

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