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This custom RF Cafe electronics-themed crossword puzzle for February 18th contains
only clues and terms associated with engineering, science, physical, astronomy,
mathematics, chemistry, etc., which I have built up over more than two decades.
Being the 18th day, words containing the letter "R" are marked with an asterisk
(*). Many new words and company names have been added that had not even been added
to the world's technical lexicon when I started in the year 2002. As always, this
crossword contains no names of politicians, mountain ranges, exotic foods or plants,
movie stars, or anything of the sort unless it/he/she is related to this puzzle's
technology theme. 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. The technically inclined cruciverbalists
amongst us will appreciate the effort. A full list of all RF Cafe crosswords is
at the page bottom. Enjoy!
Reproduction of this puzzle without the express permission
of RF Cafe is prohibited.
acr. = acronym, abbr. = abbreviation, pl. = plural, wds. = words
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1. The "D" in RFID (pl.) *
4. Another name for
Morse code *
15. Chemical symbol for polonium
16. Monolithic microwave integrated
circuit (abbr.)
17. Internet protocol (abbr.)
18. Primary U.S. standards organization
founded in 1918 (abbr.)
20. Basic element
22. The scalar component of velocity
24. Direct Memory Access (abbr.)
25. 1e-6 mA
26. European equivalent to the
U.L.
27. Coder/decoder (abbr.)
29. Length times width *
31. Chemical symbol
for silver
32. Apollo 11 astronaut ____ Armstrong
34. Alter the relations
between the parts of a structure or shape by applying an external force *
38.
Type of current flow (abbr.)
39. The design component of total product cost (abbr.)
*
40. European Telecommunications Standards Institute (abbr.)
41. Indium phosphide
(abbr.)
43. Adjust a pot
44. 10E1 numerical prefix
45. Radio Amateur Satellite
Corporation (abbr.)
46. Chemical symbol for calcium
47. Test point (abbr.)
49. Opposite of I.D.
51. Chemical symbol for scandium
53. European space probe
which visited Halley's comet
55. Rotary electrical transformer used for measuring
degrees of rotation (pl.) *
57. Peripheral Component Interface (abbr.)
59.
Low- to mid- frequency connectors
61. Archaic term for an outdoor antenna *
63. Stock symbol for RF Micro Devices *
66. Sound frequency in the human hearing
range (abbr.)
68. The "E" in FET
72. Ratio of circumference to diameter
73. Chemical symbol for strontium *
74. Which mathematical curve is the locus
of the centers of curvature of another curve
76. Weight (abbr.)
78. Chemical
symbol for selenium
80. Trigonometric function equal to the ratio between the
side adjacent to a given angle, and the hypotenuse
81. Chemical symbol for lawrencium
*
82. Online auction site
83. Change from a "1" to a "0"
85. Light ray
87. 30 Hz to 300 Hz
88. Types of power supplies *
92. Type series expansion,
named after the man who developed it *
96. Intermodulation (abbr.)
98. Opposite
of a LO
99. Chemical symbol for beryllium
100. Chemical symbol for scandium
102. It has units of degrees or radians
105. Chemical symbol for manganese
106. Communication between stations by reflecting the radio waves off of the ionosphere
108. Cellphone band just below PCS
109. Common shorthand reference for a capacitor
(pl.)
111. Electronic warfare defense (abbr.)
112. Akin to an EE, CE, AE,
etc.
113. The "A" in DARPA
115. Audio Frequency Shift Keying (abbr.)
116.
Chemical symbol for molybdenum
117. Fairchild Advanced Schottky TTL (abbr.)
119. Front end of a rocket (pl.)
122. Chemical symbol for neon
123. Semiconductor
and calculator company (abbr.)
124. International Reply Coupon (abbr.) *
125.
The highest numerical exponent describes this property of a polynomial *
130.
Universal Asynchronous Transmit/Receive (abbr.) *
131. Small representative graphic
133. Chemical symbol for iron
135. High-speed multimedia (abbr.)
136. A measure
of receiver quality (abbr.)
137. Contactless homemade (usually) inductive and/or
capacitive test cable end for tracing wireless signals on a PCB or in a chassis
(2 ltrs. + 2 wds., pl.) *
138. Equipment * |
1. Having a chemically induced effect *
2. Apple's
popular media playing device
3. Weatherproof cover for a radar antenna (pl.)
4. Common average used for sinewaves (abbr.) *
5. Unit of current
6. Singulated
piece of IC wafer
7. Current-voltage phase mnemonic
8. Boob tube (abbr.)
9. International phonetic alphabet letter "L"
10. Governmental agency that monitors
pollution (abbr.)
11. Useful distance between Tx and Rx (pl.) *
12. Automatic
network analyzer (abbr.)
13. Unit of time (abbr.)
14. Opposite of a LO
19. Measure of a component's or system's likelihood of not failing *
21. Part
of a FOR loop
23. 10E1 numerical prefix
24. 10E1 numerical prefix
26. Complex
Instruction Set Computer
28. A common RS-232 serial bus command (abbr.)
30.
Integrated transmitter and receiver (transceiver) at a station used for communication
(pl.) *
31. Strong cable covering *
32. On-the-air meeting of hams at a set
time, day and radio frequency (pl.)
33. Radio signals from the cosmos (abbr.)
35. Frequency at which XL = XC (pl.) *
36. PC follower
37. Current summing
point
39. 1e-6 mA
42. Permeability-tuned oscillator (abbr.)
48. Chemical
symbol for platinum
49. Type of logic gate (pl.) *
50. 1.602E-19 Joules
52. Printer output resolution unit (abbr.)
54. Chemical symbol for terbium
56. Point at which a further increase in one variable produces no further increase
in the resultant effect *
58. Common shorthand reference for a capacitor
60.
Chemical symbol for californium
62. Martin ____, "Test & Measurement World"
magazine editor (c2009) *
63. Electron beam pattern method used in CRTs (2 wds.,
pl.) *
64. 1E6 nanoseconds
65. Aerodynamic opposition to thrust *
67. Television
Interference (abbr.)
69. Upper frequency (abbr.)
70. Network file transfer
protocol (abbr.)
71. BS__ - the degree held by many RF Cafe visitors
74. Chemical
symbol for einsteinium
75. Switch position
77. Chemical symbol for terbium
79. End of Life (abbr.)
81. Front edge of a wing (abbr.)
84. Ground fault
interrupter (abbr.)
85. Broadband Signal Intrusion (abbr.)
86. 1/000 of an
amp (abbr.)
89. Radio term for "Will Comply"
90. Semiconductor and calculator
company (abbr.)
91. Moon of Saturn discovered in 1672 *
93. Chemical symbol
for ytterbium
94. Semiconductor lamp
95. Fundamental electrical component
w/units of ohms *
97. Waveform limit definition
101. RF ____, the world's
best engineering website *
103. Constellation : The twins
104. Electromagnetic
(abbr.)
105. Million multiply accumulate operations (abbr.)
106. Chemical
symbol for helium
107. The cell band above DCN
110. Unit of time (abbr.)
114. Name the English scientist who first performed the famous double slit experiment
and also played a major role in deciphering the Rosetta Stone
117. Release control
over *
118. Part of a FOR loop
120. Fail-____ switch
121. Chemical symbol
for erbium *
123. Unit of weight
124. Type of secondary radar system (abbr.)
126. Greek letter *
127. 2 x SSB
128. Using Earth's natural satellite as a
passive reflector to establish a signal path (abbr.)
129. Common average used
for sinewaves (abbr.) *
131. Band between RF and BB
132. Chemical symbol for
cesium
134. Filter type that blocks lower frequencies (abbr.) |
See solution below
| 2024 Crosswords Archive |
|
 Take 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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| Sudoku
Cruciverbalist:
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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April 28
April 21
April 14
April 7 |
March 31
March 24
March 17
March 1967 Radio-Electronics PuzzlerFebruary 18
February 11
February 4
January 28
January 21
January 14
January 7
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