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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...

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Engineering and Physics Theme Crossword Puzzle
February 7th, 2021

This Engineering and Physics Theme crossword puzzle for February 7th contains only words and clues related to engineering, mathematics, chemistry, physics, and other technical words. As always, this crossword contains no names of politicians, mountain ranges, exotic foods or plants, movie stars, or anything of the sort unless it/he/she is related to this puzzle's technology theme (e.g., Hedy Lamarr or the Bikini Atoll). The technically inclined cruciverbalists amongst us will appreciate the effort. Enjoy!

Reproduction of this puzzle without the express permission of RF Cafe is prohibited.

acr. = acronym, abbr. = abbreviation, pl. = plural, wds. = words

Engineering and Physics Theme Crossword Puzzle for February 7th, 2021 - RF Cafe

1. Dual Tone Multi-Frequency
4. Scheme to maintain proper frequency (abbr.)
7. Family of ICs with a certain component density level (abbr.)
10. Cause a circuit breaker to open
14. Automatic network analyzer (abbr.)
15. Reserves memory for
16. Electronics Industry Association (abbr.)
17. Co-channel rejection ratio (abbr.)
19. Software drafting tool (abbr.)
20. Software engineering tool (abbr.)
21. ___ Friedrich Gauss, after whom the unit of magnetic field strength is named
22. Mathematical basis for calculating noise power for a given bandwidth and temperature (abbr.)
24. Unit of magnetic flux
26. Amplifier linearity specification (abbr.)
28. Miniature threaded RF connector
30. Software drafting tool (abbr.)
31. Unit of frequency
33. FCC's Universal Licensing System (abbr.)
35. Printed Wiring Board (abbr.)
37. Crystal filter type (abbr.)
38. Ham's code for "Answer in prearranged order."
40. Glass device used for focussing light
42. Triangular joint filler added for strength (pl.)
45. The constellation in which Canopus is located
46. Threaded fastener
48. Ratio of a mechanical drawing
49. Computer messaging service
50. International phonetic alphabet letter "A"
51. Equivalent of Windows on Apple products
52. Bore a hole
54. Microprocessor vendor
56. Ties a bundle of wires together
59. Volt-ohmmeter (abbr., pl.)
60. Mates a plug to a jack
62. Technical drawing structure
63. Lowest power level capable of being demodulated (abbr.)
64. Compressed image file format
65. Communication between stations by reflecting the radio waves off of the ionosphere
67. Type of computer display (abbr.)
68. MS's server-side script engine for dynamically-generated web pages (abbr.)
69. Unit of energy
71. Type of distribution, squared
74. SIP x 2
75. Send junk e-mail
77. Current-voltage phase mnemonic
80. Radio term for indicating the end of a transmission segment
82. Type of digital filter (abbr.)
83. Personal Handy Phone System (abbr.)
85. European Telecommunications Standards Institute (abbr.)
87. Optical cross-connect (abbr.)
88. Condition where liquid flow is impeded by vapor trapped in a liquid line
89. Electronic component package type (abbr.)
90. Termination
91. Stock symbol for National Semiconductor
92. Measure of source / load mismatch (abbr.)
93. Mr. Blattenberger, webmaster of RF Cafe
1. Type of data conversion device (abbr., pl.)
2. RF connector type
3. Space or ____, in digital transmission
4. Circuit for maintaining constant voltage (abbr.)
5. Imperfection in a crystal lattice
6. Coder/decoder (abbr.)
7. Tied a bundle of wires together
8. Network configuration type
9. U.K. equivalent of the IEEE
11. A disk operation
12. Type of digital filter (abbr.)
13. Programmable logic device type (abbr., pl.)
18. A common RS-232 serial bus command (abbr.)
21. Units of 1000 CPS
23. Graphics file extension
25. Strong, lightweight wood
26. Code for a type of electrical wire insulation (abbr.)
27. Electrical terminal, normally left unconnected at one end
29. Conductor size unit (abbr.)
31. One state of matter
32. Circuit or mechanical designer with a Bachelor's or higher degree (pl.)
33. FCC's Universal Licensing System (abbr.)
34. Signal-to-noise ratio (abbr.)
36. Next best thing to a bearing
37. A type of jet fighter
38. Ham's code for "What is the name of your station?"
39. Online service
41. Creates an impenetrable physical barrier
43. Electronically images a document
44. Traditional term for a person who enjoys helping newcomers get started in ham radio - a mentor
45. Radio Amateur Satellite Corporation (abbr.)
47. Wireless local loop (abbr.)
49. End of Life (abbr.)
52. Digital voltmeter (abbr.)
53. International Microwave Symposium (abbr.)
55. Trans European Trunked RAdio
57. Error checking scheme (abbr.)
58. Adjust a pot
60. Innovative Power Products, Holbrook, NY (abbr.)
61. System On Chip
64. Java server pages (abbr.)
66. Greek letter often used to represent an angle
68. Powers pneumatic devices
69. Type of reconfigurable memory (abbr.)
70. Generalized Multiprotocol Label Switching (abbr.)
72. Current-voltage phase mnemonic
73. Cause the temperature to drop
74. 10E1 numerical prefix
75. Halves of DIP's
76. The "S" in CES, the world's largest yearly convention of gadget and device manufacturers
78. European Telecommunications Standards Institute (abbr.)
79. This calculus operation yields voltage across a capacitor
81. Variable crystal oscillator (abbr.)
82. Cooling device
84. Special diode type that can be switched (abbr.)
86. Specialized mobile radio (abbr.)

See solution below


2021 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.

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Engineering and Physics Theme Crossword Puzzle Solution for February 7th, 2021 - RF Cafe

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