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Electronics Theme Crossword Puzzle
May 21st, 2023

This custom RF Cafe electronics-themed crossword puzzle for May 21st contains words and clues which pertain exclusively to the subjects of electronics, science, physics, mechanics, engineering, power distribution, astronomy, chemistry, etc. If you do see names of people or places, they are intimately related to the aforementioned areas of study. Being that "T" is the 21st letter of the alphabet, it is used as the first and/or last letter of many words in today's crossword puzzle. As always, you will find no references to numbnut movie stars or fashion designers. Need more crossword RF Cafe puzzles? A list at the bottom of the page links to hundreds of them dating back to the year 2000. Enjoy.

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

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

Electronics Themed Crossword Puzzle for May 21st, 2023 - RF Cafe

1. What is the natural conversion of one element into another by radioactive decay
10. Unit of length (abbr.)
12. Mr. de Forest's first name
13. Greek letter used for frequency
14. Unit of liquid measure (abbr., pl.)
15. Synchronous Digital Hierarchy
16. Type of logic gate
18. Raise a number to the 3rd power
20. Ultra High Voltage (abbr.)
22. Morse Code for "from"
23. 1/000 of an inch
24. Device for matching antenna impedance to transmitter impedance (pl.)
26. Powers pneumatic devices
27. Chemical symbol for silver
28. 2 x SSB
29. Opposite of I.D.
30. 1/100 meter (abbr.)
31. Service of the ARRL that helps hams solve technical problems (abbr.)
32. Amateur radio abbreviation for the Oceania region (abbr.)
34. Ham's code for "Shall I increase power?"
35. Chemical symbol for tin
37. Chemical symbol for nobelium
38. Chemical symbol for cesium
39. Switch position
41. Chemical symbol for scandium
42. Type of logic gate (pl.)
43. Chemical symbol for radon
44. Negative temperature coefficient (abbr.)
45. Last stage in a transmitter (abbr.)
47. 1,000 seconds (abbr.)
48. Temporary Engineering Change document (abbr.)
49. Upper frequency (abbr.)
50. ___/IP scheme for networked connectivity
52. Structures of columns and rows
56. ___/IP scheme for networked connectivity
57. ________ _____ - Degrees of separation between two lines meeting at a common vertex (2 wds., abbr.)
59. Software drafting tool (abbr.)
61. A common lamp tube gas
63. Chemical symbol for chlorine
64. Logic family (abbr.)
65. Big Blue
67. Type of current flow (abbr.)
68. Oscillator type that is referenced to an external source (abbr.)
70. Chemical symbol for helium
71. The sending of radio signals (pl.)
1. British aircraft designer of the WWI Camel and Pup
2. Chemical symbol for aluminum
3. On-the-air meeting of hams at a set time, day and radio frequency
4. Chemical symbol for selenium
5. Balun with both ports unbalanced
6. The Brits call it a valve
7. Slang for when a professor hints at an exam problem (abbr.)
8. International Telecommunications Union
9. Workplace safety group (abbr.)
10. Frequency Division Duplex
11. Junction between two different metals that produces a voltage related to a temperature difference (pl.)
17. Slang for transmitter and/or receiver
18. Mr. Piper's famous yellow airplane
19. Chemical symbol for erbium
21. Digital encoding of the transmission mode in the vertical sync portion of an SSTV image (abbr.)
24. Thin Shrink Small Outline Package (abbr.)
25. System On Chip
28. Deutsche Industrie Normenausschuss
30. Stock symbol for Harris Communications
32. Unix, Linux or Windows (abbr.)
33. Frequency (pl.)
36. Gun safety and education organization (abbr.)
38. Cyanide (abbr.)
40. Negative temperature coefficient (abbr.)
43. Readability, Signal, and Tone (QoS report type)
46. Schematic label for voltage supply node
48. Base of the decimal number system
49. U.S. Spectrum allocation agency
51. Set of poles
53. Army-Navy specification prefix
54. Light ray
55. Plural of locus
58. Automated Test Equipment (abbr.)
60. Sound-pressure level derived using A-weighting
62. Voltage-current phase mnemonic
66. Chemical symbol for manganese
68. Unit of time (abbr.)
69. Local Oscillator (abbr.)

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 May 21st, 2023 - RF Cafe

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Kirt Blattenberger - RF Cafe Webmaster

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    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...

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