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Kirt Blattenberger - RF Cafe Webmaster

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...

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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RF Cafe Engineering & Science Crossword Puzzle
Memorial Day
May 26, 2019

Here is a specially constructed crossword puzzle in honor of our fallen service members for this Memorial Day. Since 2000, 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. 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

Engineering & Science Memorial Day Crossword Puzzle May 26, 2019 - RF Cafe

<click for full size to print>

1. Its chemical symbol is N
7. Unit of luminosity
12. Oscillator type that is referenced to an external source (abbr.)
14. Cellular Telecommunications Industry Association
17. Chemical symbol for argon
18. Gun safety and education organization (abbr.)
19. Unit of heat
21. Type of chart
22. Miniature threaded RF connector
24. Precision approach radar (abbr.)
25. Ratio of circumference to diameter
26. Stock symbol for Raytheon
28. Circuit element connecting PCB layers
29. Yard (abbr.)
31. One port on a BJT (pl.)
33. 1/1000000 prefix
35. Band between RF and BB
36. One port of an amplifier
37. Opposite of O.D.
38. Chemical symbol for krypton
39. Galilean moon
40. Chemical symbol for bismuth
41. Thin Shrink Small Outline Package (abbr.)
42. Ties a bundle of wires together
43. Chemical symbol for praseodymium
44. Chemical symbol for antimony
46. Programmable logic device (abbr.)
49. Alloy of iron and low percentages of carbon, manganese, chromium, etc.
53. Obect orientated programming term
57. Finite Element Analysis (abbr.)
60. Amateur radio operator who is qualified to administer Amateur Radio licensing examinations (abbr.)
61. Father of radio
63. Family of ICs with a certain component density level (abbr.)
64. Airport Surveillance Radar (abbr.)
65. Column of rising hot air
67. Nearest and furthest points to the center of gravitational attraction for a body in orbit
68. Vacuum tube element (pl.)
70. _____-wise linear
72. Image file format name extension
74. Certificate of Successful Completion of Examination (abbr.)
76. ELI the ICE ___
77. Slang for when a professor hints at an exam problem (abbr.)
79. Amateur Radio Association (abbr.)
80. Type of logic gate
81. Chemical symbol for cesium
83. Signal-to-noise ratio (abbr.)
84. Advanced Communication Technologies and Services (abbr.)
86. Material testing organization (abbr.)
87. Discipline for aircraft navigation in low visibility environments (abbr.)
88. Amateur radio abbreviation for the Oceania region (abbr.)
89. Miniature RF connector
90. Threaded fastener
91. Gary Breed's fine magazine on RF & microwaves topics (abbr.)
92. Opposite of O.D.
93. Conductor size unit (abbr.)
95. Started as HPIB
98. BASIC program command
102. Amateur radio operating mode for sharing realtime video (abbr.)
105. Unit of length (abbr.)
106. Army-Navy specification prefix
107. Computer communication scheme (abbr.)
108. BASIC looping keyword
110. Type of digital filter (abbr.)
111. Cause the temperature to drop
113. Erbium Doped Fiber Amplifier (abbr.)
115. Summer
117. High-speed circuit-switched data (abbr.)
119. Have a positive phase wrt a reference
121. One of the four primary defense departments whose fallen members we honor on Memorial Day
123. Current-voltage phase mnemonic
124. Engineering Change Order (abbr.)
125. The great circle equidistant from the poles
127. Chemical symbol for radium
128. Hz
129. Ratio of a mechanical drawing
131. Strong cable covering
133. Lowest power level capable of being demodulated (abbr.)
134. Chemical symbol for cobalt
136. Chemical symbol for platinum
138. International phonetic alphabet letter "R"
141. Having to do with charged particles
143. Unit of length (abbr.)
144. Radio signals from the cosmos (abbr.)
145. Chemical symbol for einsteinium
146. Chemical symbol for chromium
147. 10E1 numerical prefix
148. Chemical symbol for aluminum
149. Trigger diode that conducts current only after its breakdown voltage has been exceeded momentarily (pl.)
151. Physical unit used to measure capacitance
154. A common battery cell size
156. Stock symbol for National Semiconductor
158. Cooling device
159. Electromagnetic (abbr.)
161. Opposite of USB
163. Common gateway interface (abbr.)
164. World's largest yearly convention of gadget and device manufacturers (abbr.)
166. A common RS-232 serial bus command (abbr.)
168. Filter type (abbr.)
171. Type of modulation (abbr.)
172. An abbreviation for "receiver"
173. It can follow an MS
174. Unit of heat
175. CB slang for "negative"
1. One of the four primary defense departments whose fallen members we honor on Memorial Day
2. Infrared (abbr.)
3. Chemical symbol for radon
4. Type of logic gate
5. Chemical symbol for gallium
6. Chemical symbol for niobium
7. Trims a piece of Kapton tape to length
8. Chemical symbol for neptunium
9. Singulated piece of IC wafer
10. BS__ - the degree held by many RF Cafe visitors
11. Application Specific Integrated Circuit (abbr.)
12. Last stage in a transmitter (abbr.)
13. Filter type that blocks upper frequencies (abbr.)
14. Chemical symbol for chromium
15. Internet protocol (abbr.)
16. One of the four primary defense departments whose fallen members we honor on Memorial Day (2 wds.)
20. Passing of a planet in front of the sun
23. Point placed on a scope or analyzer display for noting a specific value (pl.)
27. Chemical symbol for neon
28. ____RF, passive RF component manufacturer in Huntersville, NC
30. Antenna gain unit (abbr.)
31. The "B" in BER
32. Half of a DIP
33. 1/000 of an inch
34. Type of logic gate (pl.)
35. Input intercept point (abbr.)
40. Early predecessor to an online forum (abbr.)
45. Graphics file extension
46. Cambridge University _____, technical book publisher
47. Type of current flow (abbr.)
48. One cutoff frequency specification for a bandpass filter
49. Greek letter, used to indicate summation
50. Type of high-tech data gathering system (abbr.)
51. IC killer (abbr.)
52. Parts _____
53. Common shorthand reference for a capacitor (pl.)
54. Family of ICs with a certain component density level (abbr.)
55. Length times width (pl.)
56. The gaseous state of water
57. Enrico _____, nuclear physicist
58. Chemical symbol for erbium
59. Amateur Teleprinter Over Radio (abbr.)
60. 3 kHz to 30 kHz
62. File name extension for an ASCII file
66. Powers pneumatic devices
67. An angle described by hypotenuse/opposite sides of a right triangle
69. Radio Amateurs of Canada (abbr.)
71. Type of computer display (abbr.)
73. Like a crystal
75. Cyanide (abbr.)
78. New company formed by RFMD and TriQuint merger
82. Electronic component package type (abbr.)
85. Half of DSB
86. Conductor size unit (abbr.)
88. Switch position
93. Association of North American Radio Clubs
94. Type of microwave diode (pl.)
95. Dielectric material used to form a hermetic seal for thru-wall conductors
96. Attenuator
97. International phonetic alphabet letter "I"
99. The UK's equivalent of the FCC
100. Service of the ARRL that helps hams solve technical problems (abbr.)
101. The highest numerical exponent describes this property of a polynomial
102. Unwanted 60- or 120- Hz modulation due to poor power supply filtering (2 wds.)
103. Part of a FOR loop
104. Electrical unit of potential difference (pl.)
106. Colorado Springs military school (abbr.)
108. Release control over
109. Moon of Saturn discovered in 1672
112. Constellation : The lion
114. Direct Memory Access (abbr.)
116. High-speed logic family
118. Special diode type that can be switched (abbr.)
120. Flash caused by an electric current ionizing a gas or vapor
122. Internet protocol (abbr.)
126. Analog-to-Digital (abbr.)
127. Receiver/transmitter that listens for a transmission and re-transmits it
130. Configuring a switch to make electrical contact
132. Substance that removes electrons from another reactant
135. Unit of resistance
137. Logic family (abbr.)
138. Positive voltage lead color
139. ECM response
140. Type of logic gate (pl.)
141. Type of secondary radar system (abbr.)
142. Software drafting tool (abbr.)
143. Very large unit of apparent power (abbr.)
150. Application Specific Integrated Circuit (abbr.)
152. Sound frequency in the human hearing range (abbr.)
153. ____ earth elements
155. One of the four primary defense departments whose fallen members we honor on Memorial Day
157. Chemical symbol for beryllium oxide
160. Unit of frequency (archaic, abbr.)
161. Chemical symbol for lawrencium
162. Filter type that blocks frequencies below and above a specified band (abbr.)
163. Chemical symbol for cadmium
164. Chemical symbol for chlorine
165. Chemical symbol for strontium
167. Chemical symbol for tin
168. Chemical symbol for mercury
169. Last stage in a transmitter (abbr.)
170. Unit of length (abbr.)
171. Chemical symbol for francium

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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