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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
February 2, 2020

As with my hundreds of previous engineering and science-themed crossword puzzles, this one for February 2, 2020, 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 February 2, 2020 - RF Cafe 

<click for full size to print>

1. Chemical symbol for calcium
2. The forcing of a signal to an insignificant level
11. Stock symbol for Boeing
13. The last transmission by a station during a contact
14. On an even planed
15. Band between RF and BB
17. Unintentionally change the oscillator frequency
18. 12 inches (pl.)
19. Part of a FOR loop
20. Substrate for mounting components (abbr.)
22. Unit of time (abbr.)
23. The "B" in BER
25. Chemical symbol for erbium
26. Filter type (abbr.)
27. Multifunctional silicon devices (abbr.)
28. Fuses metals together using heat
30. A common battery cell size
31. Chemical symbol for silver
32. Amateur Radio Association (abbr.)
34. Large unit of apparent power (abbr.)
37. Chemical symbol for lithium
39. Inventor of the high voltage generator that powers the Jacob's Ladder (2 wds.)
40. Chemical symbol for lanthanum
41. Ham's code for "Entire net stand by."
42. Ham abbreviation indicating contacts with all major land masses
43. Unit of time (abbr.)
45. Chemical symbol for neon
46. Send junk e-mail
50. Unit of volume (abbr.)
52. Slang for transmitter and/or receiver
54. Read-only (abbr.)
56. International Telecommunications Union
57. Chemical symbol for gadolinium
59. Science of assuring operation amid dense EM background noise (abbr.)
61. Part of this website's title
62. RF ____, the world's best engineering website
64. Snail and E are examples of this
66. Greek letter used for frequency
67. 36 inches (pl.)
68. Tool for holding parts while working on them (pl.)
69. Chemical symbol for ytterbium
70. A property of memristors
71. Akin to an EE, CE, AE, etc.
1. ICs
2. Half of a DIP
3. Balun with both ports unbalanced
4. Programmable logic device type (abbr., pl.)
5. Oscillator type that is referenced to an external source (abbr.)
6. Computer messaging service
7. Below ELF
8. Institute of Electrical and Electronics Engineers
9. Radio term for indicating the end of a transmission segment
10. On-the-air meeting of hams at a set time, day and radio frequency
12. Up in the air
16. A BPF specification (abbr.)
19. Test point (abbr.)
21. Cosmological theory (3,4)
23. Chemical symbol for beryllium
24. Time delay (abbr.)
26. Make equal
28. One property of light (pl.)
29. Term for asymmetry of a statistical distribution (pl.)
31. Online service
32. Automatic repeat request used in AMTOR (abbr.)
33. Stock symbol for Raytheon
35. Video Graphics Array (abbr.)
36. Flash caused by an electric current ionizing a gas or vapor
38. Bands between RF and baseband
44. The "A" in BGA
47. Ratio of circumference to diameter
48. Molecular building blocks
49. Greek letter (micro)
51. An angle that has less than 90 degrees
53. Band between RF and BB
54. ____ earth elements
55. Orthogonal frequency-division multiplexing (abbr.)
57. Ratio of output to input power, voltage, current, light, etc.
58. The "D" in CD
60. Chemical symbol for manganese
62. Person responsible for program spending (abbr.)
63. Resistive component of a capacitor's lumped element model (abbr.)
64. Very large unit of apparent power (abbr.)
65. Mr. de Forest's first name

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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Engineering & Science Crossword Solution February 2, 2020 - RF Cafe

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