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Apollo 11's 45th Anniversary Crossword Puzzle
July 20, 2014


We came in peace for all mankind (wikipedia/nasa image)- RF CafeApollo 11 mission patch (NASA image) - RF Cafe"Houston… tranquility base here. The Eagle has landed." Where were you 45 years ago when you heard on radio watched on a B&W TV like I did as Apollo 11's 'Eagle' lunar module touched down on the moon - with less than 30 seconds of fuel remaining? A short while later Neil Armstrong and Buzz Aldrin became humans #1 and #2, respectively, to step onto the lunar surface. "We came in peace for all mankind," was plaque attached to the part of the lunar lander that stayed behind. Poor Michael Collins had to be content with orbiting the moon while is shipmates went to the surface. I created this special crossword puzzle this morning to commemorate the Apollo 11 mission and all the dedicated people who made it happen. BTW, have you seen my Estes Saturn V model?

Reproduction of this puzzle without the express permission of RF Cafe is prohibited.


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1. First man on the moon - Neil _________

7. One who attaches components to a PCB

11. Forms into a specific shape

14. Electrical safety organization (abbr.)

15. JavaScript (abbr.)

16. Chemical symbol for nickel

17. Software function selection mechanism

19. Type of current

21. Chemical symbol for berkelium

23. Possess luminosity

24. Variable Frequency Oscillator

27. Modulation type (abbr.)

28. Decimeter (abbr.)

29. Branch of the armed forces

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

33. Chemical symbol for calcium

35. Logic family

37. BlackBerry or Palm for example (abbr.)

38. Sets of 24-hour periods

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

41. Greek letter often used to represent an angle

43. Curly-Q type light bulb (abbr.)

46. PC follower

47. Switch position

48. Chemical symbol for strontium

50. Chemical symbol for gadolinium

51. ___-back transformer

53. A keyboard key

54. Automatic network analyzer (abbr.)

56. Stock symbol for Linear Technologies

57. Electronics manufacturer with "meatball" logo

58. Stock symbol for Boeing

60. Infrared (abbr.)

61. One who DXs

62. Chemical symbol for lanthanum

63. Chemical symbol for calcium

65. Local Oscillator (abbr.)

66. Printer resolution abbreviation

67. Last statement in a BASIC program

68. Type of e-mail address system (abbr.)

69. Chemical symbol for arsenic

70. ______ velocity - speed necessary to become free of the Earth's gravitational force

71. Chemical symbol for tin

73. Application Specific Integrated Circuit (abbr.)

75. Signal amplitude degradation due to inefficiency (pl.)

76. PC follower

78. Morse Code for "from"

79. Manned rocket series that went to the moon

82. Megohm (abbr.)

84. Logarithmic ratio (abbr.)

86. Changes from one thing into another

88. Type of component package (abbr.)

89. Exponent that returns the original number

90. 1/000 of an inch

92. Television Interference (abbr.)

94. Chemical symbol for polonium

95. Start frequency (abbr.)

96. Chemical symbol for zinc

97. RF computer network (abbr.)

98. A common battery cell size

100. Part of this website's title

102. 30 kHz to 300 kHz

104. Digital intelligence

107. Programmable logic device (abbr.)

109. Silicon transistor type

111. Finite Element Analysis (abbr.)

113. Chemical symbol for plutonium

114. Unit of length (abbr.)

116. Chemical symbol for einsteinium

117. Chemical symbol for thallium

119. System for guiding aircraft (abbr.)

121. Printer output resolution unit (abbr.)

123. Cellular Telecommunications Industry Association

125. Under self-control (prefix)

127. Type of computer display (abbr.)

128. Ham's code for "Your net frequency is High."

130. Type of current

131. Chemical symbol for francium

132. A compiler directive

134. Network department (abbr.)

135. Chemical symbol for rhodium

137. End of Life (abbr.)

139. Mr. Blattenberger of RF Cafe

141. Filter type that blocks upper frequencies (abbr.)

143. 1.602E-19 Joules

144. RF ____, the world's best engineering website

146. Akin to an EE, CE, AE, etc.

148. Filter type that blocks lower frequencies (abbr.)

150. Chemical symbol for europium

151. A popular spreadsheet

152. Any mathematical statement that declares the values of two mathematical expressions to be equal

153. SI unit of solid angle

1. Apollo 11 astronaut Buzz ______

2. Unit for 1,000,000 watt-seconds (abbr.)

3. Half of DSB

4. Chemical symbol for radon

5. Lubricant

6. Gigahertz

7. What a capacitor is used for regarding energy

8. Logarithmic unit of voltage (abbr.)

9. 1/6 inch printer's measure

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

11. Greek letter (micro)

12. International phonetic alphabet letter "L"

13. That which has mass and occupies space (pl.)

18. Home state of Los Alamos lab (abbr.)

20. Centimeter (abbr.)

22. Send Morse Code

25. One possible go-no-go test result

26. Amateur radio abbreviation for the Oceania region (abbr.)

28. Direct Digital Synthesis (abbr.)

30. 36 in. (abbr., pl.)

32. Chemical symbol for einsteinium

33. "Calling any amateur radio station"

34. One type of electron spin

36. Coefficient of temperature (abbr.)

39. Amateur Radio Association (abbr.)

42. Gary Breed's fine magazine on RF & microwaves topics (abbr.)

44. Chemical symbol for iron

45. Lower sideband (abbr.)

46. Army-Navy specification prefix

47. Orthogonal frequency-division multiplexing (abbr.)

49. Ham-ese for Young Lady

52. Chemical symbol for ytterbium

54. Connector vendor headquartered in Bristol, PA

55. Term used in soldering to describe the condition that occurs when the metals being soldered are hot enough to melt the solder so it flows over the surface

56. Geometric entity with only length

57. Key feature in a high level overvoltage protection device

59. Dilbert's female co-worker

60. Internet protocol (abbr.)

63. Apollo 11 astronaut Michael _______

64. Digital encoding of the transmission mode in the vertical sync portion of an SSTV image (abbr.)

66. Digital storage oscilloscope (abbr.)

67. Type of reconfigurable memory (abbr.)

69. Alternative name for Beta Persei

72. Stock symbol for National Semiconductor

73. Stock symbol for Advanced Micro Devices

74. Opposite of O.D.

76. Amateur Teleprinter Over Radio (abbr.)

77. Part of a FOR loop

79. __________ Test - used to verify compliance with manufacturer published specifications

80. Number system which uses only the digits 0 to 7

81. Family of ICs with a certain component density level (abbr.)

83. Communication between stations by reflecting the radio waves off of the ionosphere

85. Operational range of frequencies (pl.)

86. Type of capacitor dielectric

87. Sample-and-____

89. Switch position

91. Low- to mid- frequency connectors

93. Unit of apparent power (abbr.)

99. Ham's code for "Answer in prearranged order."

101. Small unit of capacitance (abbr.)

102. Once around a circuit

103. Method used to sell off wireless spectrum to corporations

105. Chemical symbol for terbium

106. Nordic Mobile Telephone

108. Chemical symbol for aluminum

110. Chemical symbol for platinum

112. International phonetic alphabet letter "E"

115. Minutes of Use (abbr.)

116. Apollo ______ - first men on the moon

118. Ham's code for "Shall I stop sending?"

120. "Calling any amateur radio station"

122. Multifunctional silicon devices (abbr.)

124. Type of current flow (abbr.)

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

126. Internet address (abbr.)

127. Complex Instruction Set Computer

129. Chemical symbol for neon

133. Chemical symbol for selenium

135. Chemical symbol for radium

136. Gary Breed's fine magazine on RF & microwaves topics (abbr.)

138. Stock symbol for Lockheed Martin

140. Using the moon as a passive reflector to establish a signal path; moonbounce (abbr.)

142. It can follow an MS

144. Chemical symbol for chlorine

145. Equalizer (abbr.)

147. Chemical symbol for erbium

149. Ratio of circumference to diameter

See solution below


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.

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.


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About RF Cafe

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 tying up your telephone line, and a nice lady's voice announced "You've Got Mail" when a new message arrived...

Copyright  1996 - 2026

All trademarks, copyrights, patents, and other rights of ownership to images and text used on the RF Cafe website are hereby acknowledged.

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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