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Independence Day Radio Crossword Puzzle
July 5, 2020

This week's custom RF Cafe crossword puzzle celebrates the 244th anniversary of the signing of the Declaration of Independence, and uses as a background the John Trumbull painting. Clues marked with an asterisk (*) are part of the theme. Each week for two decades, for the sake of all avid cruciverbalists amongst us, I have created a new technology-themed crossword puzzle using only words from my custom-created lexicon related to engineering, science, mathematics, chemistry, physics, astronomy, etc. You will never find among the words names of politicians, mountain ranges, exotic foods or plants, movie stars, or anything of the sort. You might, however, find someone or something in the otherwise excluded list directly related to this puzzle's technology theme, such as Hedy Lamarr or the Bikini Atoll, respectively. Enjoy!

cruciverbalist: [noun]  cruci- ("cross") +‎ verbal ("words") +‎ -ist ("agent, person") -- A person who constructs crosswords.

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

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

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

Independence Day Radio Crossword Puzzle for July 5, 2020 - RF Cafe


2. _______ + 87 Down + 98 Across, author of the "49 Across + 13 Across + 60 Down," national anthem of the 30 Across*

6. Collection of access points

11. Enhanced Graphics Adapter

13. File extension for some "theme" files

14. Coefficient of temperature (abbr.)

15. Extract information from a modulated signal

19. 1E6 nanoseconds

20. Computer monitor resolution measure (abbr.)

23. Personal Handy Phone System (abbr.)

24. Logic family (abbr.)

26. Circuit element connecting PCB layers

28. Another name for amateur radio

30. 2 Across + 87 Down + 98 Across, author of the "49 Across + 13 Across + 60 Down," national anthem of the ___*

33. 2 Across + 87 Down + 98 Across, author of the "49 Across + ________ + 60 Down," national anthem of the 30 Across*

35. 36 in. (abbr., pl.)

36. Rechargeable battery type (abbr.)

38. Method of self-detection and self-fixing transmission of digital data (abbr.)

40. Release control over

41. Target indication on a radar display

43. Programmable Logic Device (abbr.)

45. Unit of energy

47. Facsimile

48. Base of the binary number system

49. Network configuration type

51. Electrical safety organization (abbr.)

53. Chemical symbol for erbium

54. More than one BJT

56. Negation prefix

57. Direct Memory Access (abbr.)

58. Nickname given to a satellite

59. Unit of time (abbr.)

61. A BPF specification (abbr.)

62. Society of Civil and Structural Engineers (abbr.)

64. Service of the ARRL that helps hams solve technical problems (abbr.)

65. Amateur radio enthusiast

67. Large unit of apparent power (abbr.)

68. Last statement in a BASIC program

69. Basic element

71. Primary U.S. standards organization founded in 1918 (abbr.)

72. Engineering Change Order (abbr.)

75. Length times width (pl.)

78. End of transmission (abbr.)

80. Battery manufacturer in Bethel, CT

84. Notch type filter (abbr.)

85. The "C" in CES, the world's largest yearly convention of gadget and device manufacturers

88. Unlicensed radio type for personal and business use (abbr., pl.)

89. Intermodulation distortion (abbr.)

91. Bands between RF and baseband

92. Electromagnetic interference (abbr.)

93. Opposite of I.D.

95. Shorthand for telecommunications

97. Chemical symbol for holmium

98. 2 Across + 87 Down + ___, author of the "49 Across + 13 Across + 60 Down," national anthem of the 30 Across*

100. Heterojunction Bipolar Transistor

101. Fusing metals together using heat

102. Color set

1. Which branch of science means literally the physics of the earth

3. Radio-Electronics-Television Manufacturer's Association

4. Feedback system used to maintain constant signal level (abbr.)

5. 1e-6 mA

7. Weight (abbr.)

8. Unit of resistance

9. The stuff in the solder core

10. Transmits a signal

12. Chemical symbol for cobalt

15. Greek letter

16. Chemical symbol for einsteinium

17. Radio signals from the cosmos (abbr.)

18. A common RS-232 serial bus command (abbr.)

21. Attenuator

22. International Microwave Symposium (abbr.)

23. Ratio of circumference to diameter

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

26. 3 kHz to 30 kHz

27. U.K. equivalent of the IEEE

29. Perform a calculus function

30. Schema for computer or device presentation to the operator (abbr.)

31. What kind of mathematical quantity has magnitude, but no direction

32. A common battery cell size

34. Mathematical model for an inexact representation of a function

36. Chemical symbol for neon

37. Logarithmic ratio (abbr.)

39. Shaping an object by forcing material through a die

42. Equiripple filter type

43. Unit of capacitance (abbr.)

44. Ham abbreviation for "distant station"

46. Type of microwave diode (pl.)

48. Follow a target on radar

50. Television Interference (abbr.)

52. Line of Sight (abbr.)

53. Electromotive force (abbr.)

55. Slang for when a professor hints at an exam problem (abbr.)

58. An incorrectly logged call sign (2 wds.)

60. 2 Across + 87 Down + 98 Across, author of the "49 Across + 13 Across + ______," national anthem of the 30 Across*

63. One of the "E"s in BSEE

65. Chemical symbol for helium

66. Chemical symbol for mendelevium

70. 1/000 of an amp (abbr.)

71. Chemical symbol for arsenic

73. Mr. Piper's famous yellow airplane

74. Type of logic gate (pl.)

76. Chemical symbol for rubidium

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

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

79. Original Equipment Manufacturer (abbr.)

81. Inductor used to block RF signals

82. Chemical symbol for lithium

83. Stock symbol for Lockheed Martin

85. Airflow rate (abbr.)

86. Unix, Linux or Windows (abbr.)

87. 2 Across + _____ + 98 Across, author of the "49 Across + 13 Across + 60 Down," national anthem of the 30 Across*

90. Morse Code for "from"

91. Galilean moon

94. Keyboard key

96. Chemical symbol for europium

97. Heterojunction Bipolar Transistor

99. Yard (abbr.)

100. Chemical symbol for helium

See solution below

2020 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.

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Independence Day Radio Crossword Solution for July 5, 2020 - RF Cafe

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