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About RF Cafe

Kirt Blattenberger - RF Cafe Webmaster

Copyright: 1996 - 2024

Webmaster:

    Kirt Blattenberger,

    BSEE - KB3UON

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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AirplanesAndRockets.com

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RF Cafe Science & Engineering Crossword Puzzle
April 19, 2020

April 19 commemorates a special birthday here at RF Cafe as explained in 39 and 74 Across. You can calculate her age by solving these two equations in two unknowns: Her Age = Her Year of Birth - 1902, and My Age = Her Year of Birth - 1900. Actually, you don't need to know my age to solve the first equation. This tech-themed crossword puzzle contains only clues and terms associated with engineering, science, physical, astronomy, mathematics, chemistry, etc., which I have personally built 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

Radio & Radar Engineering Crossword Puzzle April 19, 2020 - RF Cafe

<click for full size to print>

ACROSS DOWN
1. State _______ - A type of drawing used in computer science and related fields to describe the behavior of systems (pl.)

6. Variable crystal oscillator (abbr.)

9. Determination of cause and effect

15. Electrical overstress (abbr.)

16. The tip of a PCB probe

18. Total Access Communication System (abbr.)

20. Cyanide (abbr.)

21. System On Chip

23. Radio Direction Finding (abbr.)

24. High-speed logic family

25. Organization requiring 25 years of amateur service for membership, abbr.

26. Chemical symbol for lithium

28. Transformer interwinding connection

30. Type of data conversion device (abbr.)

32. Low- to mid- frequency RF connector

33. Open-______ or closed-______ system

34. Thread cutting tools

37. Service of the ARRL that helps hams solve technical problems (abbr.)

39. _______ + 74 Across, Ma jolie femme, Meine schöne Frau, Mi hermosa esposa, Mia bella moglie, Min vackra fru,Mia bela edzino, Mo bhean álainn, 私の美しい妻

43. Chemical symbol for calcium

44. Write-Once (abbr.)

45. Using minimum resources

48. Type of optical network

50. Mate to a TX

52. Chemical symbol for radium

53. Line of Sight (abbr.)

54. European equivalent to the U.L.

56. Modulation type (abbr.)

57. Stock symbol for Harris Communications

59. Chemical symbol for bismuth

62. Chemical symbol for xenon

64. RF IC manufacturer located in Dübendorf, Switzerland

67. Oscillate from + to -

71. Sound frequency in the human hearing range (abbr.)

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

74. 39 Across + _______, Ma jolie femme, Meine schöne Frau, Mi hermosa esposa, Mia bella moglie, Min vackra fru,Mia bela edzino, Mo bhean álainn, 私の美しい妻

76. Unit of atmospheric pressure (abbr.)

77. Balun with both ports unbalanced

78. Software function selection mechanism

79. Programmable logic device (abbr.)

80. Semiconductor lamp

82. Peak envelope power (abbr.)

84. Electromagnetic (abbr.)

85. Amateur Radio Emergency Service (abbr.)

87. Silicon transistor type

90. Big Blue

91. Be behind in phase

92. Ratio of circumference to diameter

93. Type of programmable device (abbr.)

95. The "F" in EMF

98. File name extension for an ASCII file

99. Having no resistive component

100. Akin to EEs, CEs, AEs, etc. (abbr., pl.)

101. Another name for amateur radio

1. Opposite of encode

2. Charged particle

3. Chemical symbol for arsenic

4. One factor of a polynomial

5. Chemical symbol for manganese

6. Vector Offset Frequency Shift Keying

7. Greek letter

8. Exponent that returns the original number

10. Unit of inductance (abbr.)

11. Type of high frequency circuit substrate (abbr.)

12. Rotate about the vertical axis

13. What kind of mathematical quantity has magnitude, but no direction

14. Network department (abbr.)

16. BlackBerry or Palm for example (abbr.)

17. Coefficient of temperature (abbr.)

19. Common test for verifying high voltage tolerance w/o breakdown

22. Positively charged ion

25. Ham's code for "Entire net stand by."

26. The "L" in VLF

27. Weather facsimile, Ham abbr.

29. Chart types

31. World's largest yearly convention of gadget and device manufacturers (abbr.)

32. The "B" in BER

35. Discipline for aircraft navigation in low visibility environments (abbr.)

36. Chemical symbol for silicon

38. Chemical symbol for tin

40. Local Oscillator (abbr.)

41. Automatic network analyzer (abbr.)

42. Electric enclosure standard organization (abbr.)

46. Chemical symbol for chlorine

47. Temperature-compensated crystal oscillator (abbr.)

49. Small motored tool for model drilling, grinding, shaping, etc.

51. 8 GHz to 12.5 GHz

55. IC killer (abbr.)

57. Web page language

58. Chemical symbol for strontium

60. International Telecommunications Union

61. Mr. Joule's first name

63. Totals

64. Online service

65. Modern battlefield technique (abbr.)

66. 1/000 of an inch

68. Chemical symbol for lanthanum

69. Greek letter used for frequency

70. Mr. Fermi's first name

72. Finite-Element Model

74. One state of matter

75. Mr. Bohr's first name

79. Positive emitter-coupled logic (abbr.)

81. Decibels above or below a dipole antenna (abbr.)

83. Set of poles

86. Effective frontal area presented to a microwave interrogation system (abbr.)

88. A measure of receiver quality (abbr.)

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

92. Greek letter

93. Chemical symbol for polonium

94. Chemical symbol for einsteinium

96. BS__ - the degree held by many RF Cafe visitors

97. Stock symbol for Boeing

98. Analog-to-Digital (abbr.)


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.

2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 | 2014 | 2013 | 2012 | 2011 | 2010 | 2009 | 2008 | 2007 | 2006 | 2005 | 2004 | 2003 | 2002 | 2001 | 2000 | Sudoku

December 27

December 20

December 13

December 7

November 29

Thanksgiving Day

November 22

November 15

November 8

November 1

October 25

October 18

October 11

October 4

September 27

September 20

September 13

September 6

August 30

August 23

August 16

August 9

August 2

July 26

July 19

July 12

July 5

June 28

June 21

June 14

June 7

May 31

May 24

May 17

May 10

May 3

April 26

April 19

April 12

April 5

March 29

March 22

March 15

March 8

March 1

February 23

February 16

February 9

February 2

January 26

January 19

January 12

January 5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Radio & Radar Engineering Crossword Solution April 19 - RF Cafe

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