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RF Cafe Engineering & Science Crossword Puzzle
October 13, 2019

For two decades, I have been creating custom engineering- and science-themed crossword puzzles for the brain-exercising benefit and pleasure of RF Cafe visitors who are fellow cruciverbalists. This October 13, 2019, puzzle contains the names of at least eight advertisers* who help deliver RF Cafe to you every day. Otherwise, it uses a database of thousands of words which I have 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. 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.

* Click here for a list of RF Cafe advertisers.

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 October 13, 2019 - RF Cafe

<click for full size to print>

1. Ham's code for "Does my frequency vary?"

4. _____Temp Technologies, maker of thermal platforms for cryogenic cooling, , recirculating circulating coolers, temperature chambers and temperature controllers*

8. Opposite of set

12. Amateur Radio Association (abbr.)

15. Silicon transistor type (abbr.)

17. Unit of length equal to 5.5 yards

18. End of Life (abbr.)

19. Below ELF

21. Type of matrix barcode used with laser scanning(abbr.)

23. Ham's code for "What is the name of your station?"

25. Substrate for mounting components (abbr.)

27. Sample group

28. Device under test (abbr.)

29. Chemical symbol for aluminum

30. 300 MHz to 3 GHz

32. Electromagnetic interference (abbr.)

34. Chemical symbol for selenium

35. Network department (abbr.)

36. Big Blue

37. U.K. equivalent of the IEEE

38. Greek letter

39. BlackBerry or Palm for example (abbr.)

41. Common average used for sinewaves (abbr.)

42. Flash caused by an electric current ionizing a gas or vapor

43. Custom ____, produces RF switches, phase shifters, attenuators, mixers and multipliers, and low noise, low phase* noise, and distributed amplifiers

45. Slang for transmitter and/or receiver

46. Ham abbreviation for transceiver

48. ________ Test Equipment, used / refurbished TE with short- and long-term rentals, repair, maintenance, calibration

49. Component that only allows RF signal flow in one direction

50. Type of data conversion device (abbr.)

52. Video Graphics Array (abbr.)

53. International phonetic alphabet letter "E"

56. World's first satellite navigation system (abbr.)

58. A common RS-232 serial bus command (abbr.)

59. Filter type that blocks upper frequencies (abbr.)

62. Balun with both ports unbalanced

65. Angular speed unit

66. Once around a circuit

67. Unit of apparent power (abbr.)

68. Analog-to-Digital (abbr.)

70. The "B" in BER

72. Voltage-current phase mnemonic

73. Chemical symbol for arsenic

74. Communication between stations by reflecting the radio waves off of the ionosphere

75. Spurious RF products created by metal joints (abbr.)

76. Stock symbol for Texas Instruments

78. Radio Amateurs of Canada (abbr.)

80. Chemical symbol for scandium

81. Facsimile

82. U.S. military organization (abbr.)

83. Effective Radiated Power (abbr.)

85. Precision approach radar (abbr.)

87. Internet address (abbr.)

88. Steel, brass, aluminum, etc.

89. _____, maker of RF power amplifiers, LNAs, integrated assemblies, microwave and mm-wave systems*

90. Design for Manufacturability (abbr.)

2. Chemical symbol for radon

3. Stock symbol for Hewlett Packard

5. Type of logic gate

6. Uppermost surface

7. Type of data conversion device (abbr., pl.)

9. Low altitude earth orbit

10. End of transmission (abbr.)

11. Chemical symbol for aluminum

12. ___-AZIMUTH telescope mount

13. Centric __, maker of coaxial components, including attenuators, adapters, cable assemblies, terminations, power dividers*

14. A triangle that has all sides equal in length

16. The design component of total product cost (abbr.)

19. Add two or more inputs

20. Anatech ___________, produces RF and microwave filters, diplexers, duplexers*

22. Greek letter

24. Unit of current

26. Connector vendor, now owned by FCI in St. Louis, Missouri

27. Parts _____

28. Relative power level unit (abbr.)

29. Anatech Electronics Inc., (abbr.)

31. Unit of length (abbr.)

33. Opposite of O.D.

36. Infrared (abbr.)

37. Intermodulation (abbr.)

40. Length times width (pl.)

42. Leaded component type

44. A common battery cell size

47. Programmable Logic Device (abbr.)

51. Study for a test just before taking it

52. Very small aperture terminal

54. Hz

55. 1/100 meter (abbr.)

56. Key feature in a high level overvoltage protection device

57. Min-to-max voltage of a waveform (abbr.)

60. Chemical symbol for lead

61. Type of digital filter (abbr.)

63. Chemical symbol for neon

64. FCC's Universal Licensing System (abbr.)

66. Shorthand for liquid oxygen

67. ____RF, manufacturer of isolators, circulators, power dividers, couplers, connectors, adapters, cable assemblies*

69. One who DXs

71. Transformer interwinding connection

74. The computer in 2001: A Space Odyssey

75. Short for potentiometer

77. Non-return to zero (abbr.)

79. Software drafting tool (abbr.)

81. Chemical symbol for francium

82. Morse Code for "from"

84. Ratio of circumference to diameter

86. Empower __ Systems, producer of fault-protected high-power solid state amplifiers*

See solution below


2019 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 October 13, 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 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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