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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.

2024 | 2023 |2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 | 2014 | 2013 | 2012 | 2011 | 2010 | 2009 | 2008 | 2007 | 2006 | 2005 | 2004 | 2003 | 2002 | 2001 | 2000 | Sudoku


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

December 22

December 15

December 8

December 1

November 24

November 17

November 10

November 3

October 27

October 20

October 13

October 6

September 29

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September 8

September 1

August 25

August 18

August 11

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July 28

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April 28

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March 24

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March 3

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