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RF Cafe Engineering & Science Crossword Puzzle
April 14, 2019

Since 2000, I have been creating custom technology-themed crossword puzzles for the brain-exercising benefit and pleasure of RF Cafe visitors who are fellow cruciverbalists. 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. A database of thousands of words has been 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.

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

RF Cafe Engineering & Science Crossword Puzzle April 14, 2019

<click for full size to print>

1. Inventor of the pre-quantum atomic model

5. 3-D geometrical figure that is symmetrical about each of three perpendicular axes, and has circular sections along one axis and elliptical sections along the others

11. Type of Nyquist filter whose passband-to-stopband transition region has the shape of the first half-cycle of a cosine raised so that the negative peak is at zero in passband and stopband (2 wds., hyph.)

20. Ad-hoc on demand distance vector (abbr.)

24. Synchronous Digital Hierarchy

25. Type of logic gate

26. Chemical symbol for holmium

27. 1/000 of an amp (abbr.)

28. Electronic component package type (abbr.)

29. Microwaves & __ magazine

30. Semiconductor device type (abbr.)

31. Considered the 4th dimension

33. Performs a disk operation

35. Move from cell to cell

37. Multichannel multipoint distribution service

39. Web's most popular radio frequency engineering site (2 ltrs. + 1 wd.)

42. Thin Shrink Small Outline Package (abbr.)

44. 1E6 nanoseconds

46. Automatic Calibration System (abbr.)

47. Russian space probes which visited Halley's comet

48. Semiconductor and calculator company (abbr.)

49. Original Equipment Manufacturer (abbr.)

51. Logic family

52. Chemical symbol for gallium

54. FCC Part 15 rules apply in this band (abbr.)

55. PC follower

56. Peak envelope power (abbr.)

58. CB slang for policeman

59. Result of multiplying the mass of an object by its velocity

62. Factor of ten

65. Data transmission pathway

66. Chemical symbol for cadmium

67. Hub of the solar system

68. Chemical symbol for silver

70. Radio Amateurs of Canada (abbr.)

71. One port of an amplifier

73. Chemical symbol for rhodium

74. Singulated piece of IC wafer

75. Cyanide (abbr.)

76. Logarithmic unit of ratio (abbr., pl.)

79. Device for linearly adding two or more inputs

82. Electromagnetic switch type

85. Length times width

88. Airflow rate (abbr.)

91. Internet protocol (abbr.)

92. Finite Element Analysis (abbr.)

94. Chemical symbol for silicon

95. Input intercept point (abbr.)

97. Hub of the solar system

98. Chemical symbol for neptunium

99. Another name for a test lead

100. Transformer interwinding connection

102. Unit of inductance (abbr.)

103. Negatively doped silicon

105. Was behind in phase

108. Image file format name extension (pl.)

110. Not hot

111. Unit of magnetic flux

113. Divide a signal into into chunks for sampling

115. Special diode type that can be switched (abbr.)

117. Front edge of a wing (abbr.)

118. Software engineering tool (abbr.)

120. Chemical symbol for argon

121. Chemical symbol for neodymium

122. Precision approach radar (abbr.)

123. System for guiding aircraft (abbr.)

125. Adjusts a pot

126. Type of capacitor dielectric

127. What are the attractive and repulsive forces produced by electric charge in motion

128. Sharp bend in I-V curve

2. Unix, Linux or Windows (abbr.)

3. High Data Rate

4. Moon of Saturn discovered in 1672

5. Last keyword in a BASIC subroutine (pl.)

6. Line of Sight (abbr.)

7. Chemical symbol for lawrencium

8. Write software

9. Unit of resistance

10. Galilean moon

11. Its chemical symbol is Rn

12. Network department (abbr.)

13. Specialized mobile radio (abbr.)

14. Erbium Doped Fiber Amplifier (abbr.)

15. Lunar depression

16. Switch position

17. Band between RF and BB

18. On-the-air meeting of hams at a set time, day and radio frequency

19. European Telecommunications Standards Institute (abbr.)

20. Basic element

21. Output intercept point (abbr.)

22. Decimeter (abbr.)

23. An opening for airflow (pl.)

27. Unit of length (abbr.)

32. Unit of current

34. Abbreviation for acknowledge (also a common word used by Bill the Cat)

35. Government program to bring electricity to farms (abbr.)

36. A common battery cell size

37. Moon of Saturn discovered in 1789

38. Adjust a pot

40. Imaging device (abbr.)

41. Enhanced Graphics Adapter

43. Half of DSB

45. Chemical symbol for selenium

47. The evening star

48. Telex-Over-Radio (abbr.)

50. Elementary particle

53. Summed

55. Chemical symbol for gold

57. Cellphone band directly above DCS

58. Data transmission pathway

60. Official engineering change document (abbr., pl.)

61. Elementary particles

63. International phonetic alphabet letter "C"

64. Electronics Industry Association (abbr.)

65. Low- to mid- frequency RF connector

69. He developed a "counter" for measuring radiation levels

72. End of soldering iron

76. Trigger diode that conducts current only after its breakdown voltage has been exceeded momentarily (pl.)

77. Filter type that blocks frequencies below and above a specified band (abbr.)

78. Send Morse Code

80. 1/000 of an inch

81. Slang for transmitter and/or receiver

83. Cable termination type

84. World's 1st fully electronic digital computer (abbr.)

86. Unit of length equal to 5.5 yards

87. Facility where semiconductors are manufactured

89. Small unit of capacitance (abbr.)

90. Unit of admittance

92. Sends a file over a network (abbr.)

93. Nearest and furthest points to the center of gravitational attraction for a body in orbit

96. Positive emitter-coupled logic (abbr.)

99. Chemical symbol for polonium

100. Short for terminal

101. Maximum voltage in a waveform

103. Logical negation operator

104. High-speed logic family

106. ___-AZIMUTH telescope mount

107. 24 hours

109. Chemical symbol for francium

110. CDMA Development Group (abbr.)

111. Akin to WAC, only just in America

112. Stock symbol for Raytheon

114. Chemical symbol for helium

116. One component of a complex number (abbr.)

119. Radio signals from the cosmos (abbr.)

121. 1e-6 mA

122. Ratio of circumference to diameter

124. European equivalent to the U.L

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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A cruciverbalist is a person who is skilled at creating or solving crossword puzzles. The term is a combination of "cruci-" from "crucifix," meaning cross, and "verbalist" from "verbal," indicating a person who deals with words. cruciverbalists are often responsible for designing crossword puzzles, and they possess a deep knowledge of wordplay, vocabulary, and the techniques used in constructing and solving crosswords. They aim to make puzzles that are both challenging and enjoyable for crossword enthusiasts.

December 29

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December 15

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September 1

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RF Cafe Engineering & Science Crossword Puzzle April 14, 2019

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