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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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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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RF Cafe Engineering & Science Crossword Puzzle April 14, 2019

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