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Electronics Theme Crossword Puzzle
April 23rd, 2023

As always, this week's crossword puzzle for April 23rd sports an electronics theme. All RF Cafe crossword puzzles are custom made by me, Kirt Blattenberger, and have only words and clues related to RF, microwave, and mm-wave engineering, optics, mathematics, chemistry, physics, and other technical subjects. 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 (e.g., Reginald Denny, Hedy Lamarr, or the Tunguska event in Siberia). The technically inclined cruciverbalists amongst us will appreciate the effort. Enjoy!

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

acr. = acronym, abbr. = abbreviation, pl. = plural, wds. = words

Electronics Theme Crossword Puzzle for April 23, 2023 - RF Cafe


1. S12 or S21 (abbr.)
2. Minutes of Use (abbr.)
3. Opposite of O.D.
4. Chemical symbol for nickel
5. Stock symbol for Harris Communications
6. Chemical symbol for gallium
7. Bit error rate tester (abbr.)
8. Fine tuning control on single-sideband CB radios (pl.)
9. 1,000 seconds (abbr.)
10. Sound frequency in the human hearing range (abbr.)
11. Time taken for information to pass through a circuit element (2 wds.)
12. Join a male and a female connector
13. Chemical symbol for cobalt
17. Type of current flow (abbr.)
19. Ham's term for radio equipment enclosure (pl.)
20. Sample group
21. Ovenized crystal oscillator (abbr.)
22. Metal mixtures
24. Governmental agency that monitors pollution (abbr.)
25. Precision approach radar (abbr.)
26. Rate of a radar transmitter's output waveform (abbr.)
30. Digital storage oscilloscope (abbr.)
32. Frequency division multiple access (abbr.)
33. Electromagnetic (abbr.)
34. Chemical symbol for chromium
35. Reliability measure
38. Short for potentiometer
39. Internet address (abbr.)
42. The "E" in TEM
45. Insert a doping ion into a semiconductor lattice
49. Type of digital filter (abbr.)
50. Logic family (abbr.)
51. Temporary Engineering Change document (abbr.)
52. Service of the ARRL that helps hams solve technical problems (abbr.)
53. Engineering Change Notice (abbr.)
54. Ham's code for "Are my signals fading?"
59. Resistors, capacitors, inductors, diodes, etc.
61. One port on a BJT (pl.)
62. Send a wireless to an early hip-worn wireless device
64. Unlicensed radio type for personal and business use (abbr., pl.)
65. Ham abbreviation indicating contacts with all major land masses
67. Society of Civil and Structural Engineers (abbr.)
69. Connected to a transformer interwinding point
72. Its chemical symbol is C
73. World's largest yearly convention of gadget and device manufacturers (abbr.)
75. Modulation type (abbr.)
76. Analog-to-Digital (abbr.)
78. World's largest yearly convention of gadget and device manufacturers (abbr.)
80. Slang for transmitter and/or receiver
82. Schema for computer or device presentation to the operator (abbr.)
84. Semiconductor device type (abbr.)
85. Error checking scheme (abbr.)
87. An abbreviation for "receiver"
88. Current summing point
89. Chemical symbol for beryllium
92. 1e-6 mA
94. Type of chart
95. Test equipment (abbr.)
96. Part of a FOR loop
97. Transmit Incremental Tuning (abbr.)
100. Army-Navy specification prefix
101. Decimeter (abbr.)
102. Chemical symbol for californium
103. Chemical symbol for nobelium


1. Intermodulation (abbr.)
3. One port of an amplifier
5. Chemical symbol for mercury
7. Symbols and lines used to construct a representative drawing of a system at a high level (2 wds.)
13. European equivalent to the U.L.
14. FCC's Universal Licensing System (abbr.)
15. An unlicensed radio band in the U.S. often used for walkie-talkies (abbr.)
16. A common battery cell size
18. Type of logic gate (pl.)
20. Local Oscillator (abbr.)
22. System for guiding aircraft (abbr.)
23. Junction between two different metals that produces a voltage related to a temperature difference
27. Software layer that allows a system to be programmed via a defined set of commands (abbr.)
28. Mate to an RX
29. Programmable logic device (abbr.)
31. Web's most popular radio frequency engineering site (2 ltrs. + 1 wd.)
34. Optical storage media
36. Electronics components & batteries supplier based in Japan
37. Containing a contaminant
40. Elemental compound used for microwave frequency reference oscillators (abbr.)
41. BSEE + 2 years
43. Type of logic gate
44. Parts _____
46. Chemical symbol for lawrencium
47. Chemical symbol for thallium
48. Modulation type (abbr.)
50. The "T" in ATE
52. Enter data using the keyboard
55. Stock symbol for Intel
56. European Telecommunications Standards Institute (abbr.)
57. Smartphone display (abbr., pl.)
58. Type of high frequency circuit substrate (abbr.)
60. Move in a raster pattern
63. Read-only (abbr.)
64. Pure carrier (abbr.)
66. Switch position
68. Basic element
70. Stock symbol for Boeing
71. Type of high frequency circuit substrate (abbr.)
73. Early computer display screen resolution (abbr.)
74. French mathematician and physicist who's name is used as a unit of gas pressure
77. File name extension for an ASCII file
79. Type of reconfigurable memory (abbr.)
81. What is the name of the unit of angular measurement equal to one ninetieth of a right angle
83. Part of a male connector
84. A BPF specification (abbr.)
86. Mr. Piper's famous yellow airplane
87. Process of passing a signal through the same amplifier multiple times to increase gain
89. Digital pattern coding type (abbr.)
90. Coefficient of temperature (abbr.)
91. Negation prefix
93. 1.602E-19 Joules
94. Push to Talk (abbr.)
96. Ham abbreviation for transceiver
98. 10E1 numerical prefix
99. 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.)
104. Chemical symbol for neon
105. 300 kHz to 3 MHz
106. Part of a FOR loop

See solution below


2023 Crosswords 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 31

December 24

December 17

December 10

December 3

November 26

November 19

November 12

November 5

R-E Puzzler - August 1967 R-E

October 29

October 22

October 15

October 8

October 1

September 24

September 17

September 10

September 3


August 27

August 20

August 13

August 6

Electronic Numbers - May 1961 R-E

July 30

July 23

July 16

July 9

R-E Puzzler - Oct 1967 R-E

July 2

June 25

June 18

June 11

June 4

May 28

May 21

May 14

May 7


April 30

April 23

April 16

April 9 - Easter

R-E Puzzler - Jan 1967 R-E

April 2

March 26

March 19

March 12

March 5

February 26

February 19

February 12

February 5

January 29

January 22

January 15

January 8

January 1

Electronics Themed Crossword Puzzle Solution for April 23, 2023 - RF Cafe

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