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About RF Cafe

Kirt Blattenberger - RF Cafe Webmaster

Copyright: 1996 - 2024

Webmaster:

    Kirt Blattenberger,

    BSEE - KB3UON

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

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Physics & Science Theme Crossword Puzzle
February 14th, 2021

This Physics & Science Theme crossword puzzle for Valentine's Day 2021 contains only words and clues related to engineering, mathematics, chemistry, physics, and other technical words. 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., Hedy Lamarr or the Bikini Atoll). 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

Physics & Science Theme Crossword Puzzle for February 14th, 2021 - RF Cafe

ACROSS DOWN
1. Its chemical symbol is Ru

5. Quantity of heat equal to 100,000 BTU

9. Chemical symbol for aluminum

10. Satellite EHF Communications for Mobile Multimedia

13. Web's most popular radio frequency engineering site (2 ltrs. + 1 wd.)

17. Chemical symbol for scandium

18. No insulation

19. Wireless phone region

22. Semiconductor and calculator company (abbr.)

23. Chemical symbol for nickel

25. A common battery cell size

26. Chemical symbol for thallium

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

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

29. Global System for Mobile Communications (abbr.)

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

32. Army-Navy specification prefix

33. Used logic gates

34. One of the Ws in WWW

36. Chemical symbol for antimony

37. High electron mobility transistor

38. _____ Microwave East (part of L3-Com), RF component manufacturer located in Hauppauge, NY

40. PC follower

41. Minutes of Use (abbr.)

42. Chemical symbol for nickel

43. The "E" in BER

45. 30 MHz to 300 MHz

46. Digital intelligence

48. ECM response

49. Type of logic gate

50. Radio-Electronics-Television Manufacturer's Association

52. Test equipment (abbr.)

53. Flash caused by an electric current ionizing a gas or vapor

54. Type of current flow (abbr.)

55. Attenuator topology (pl.)

58. Co-channel rejection ratio (abbr.)

60. Chemical symbol for helium

61. End of Life (abbr.)

62. 10E-12 numerical prefix

64. Chemical symbol for argon

65. Silicon transistor type

67. Wireless application protocol (abbr.)

68. Part of a FOR loop

69. Type of logic gate

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

72. Intermodulation (abbr.)

74. Chemical symbol for molybdenum

75. Network department (abbr.)

76. Moon of Saturn discovered in 1672

77. Units of heat

79. Unix, Linux or Windows (abbr.)

80. Computer display unit (pl.)

81. Overall functional unit

86. Read-only (abbr.)

87. International phonetic alphabet letter "I"

88. Calendar that followed the Julian calendar

1. Term used to denote transmission of sound, video, data, etc. (2 wds.)

2. Electrical safety organization (abbr.)

3. Radiation which has wavelengths longer than that of red light

4. 1E6 nanoseconds

5. Coefficient of temperature (abbr.)

6. Chemical symbol for holmium

7. Electromagnetic (abbr.)

8. Type of flip-flop

11. Project box

12. Numbers entered as a number from one to ten multiplied by a power of ten (2 wds.)

13. _____-Kutta method in differential equations

14. Unlicensed FCC Part 95 realm for personal and business radio use (abbr.)

15. A common battery cell size

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

17. The gaseous state of water

20. Chemical symbol for lutetium

21. Electromagnetic radiation in the visible spectrum

24. Integrated Services Digital Network (abbr.)

26. Test point (abbr.)

31. Chemical symbol for lead

34. Transfer data to a disk

35. The UK's largest defense electronics contractor (abbr.)

39. Association of North American Radio Clubs

40. Emitted a flash during electrical discharge

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

47. Cause to decrease in magnitude

51. Automated Test Equipment (abbr.)

54. Strong cable covering

56. Describes a charge with a deficiency of electrons

57. Junk e-mail

59. Type of vector product

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

63. Apple's popular media playing device (pl.)

66. Ratio of circumference to diameter

70. Chemical symbol for rhodium

73. Multiplexer (abbr.)

77. Filter type that blocks frequencies below and above a specified band (abbr.)

78. Chemical symbol for selenium

81. Chemical symbol for tin

82. Yard (abbr.)

83. Chemical symbol for silicon

84. Chemical symbol for tantalum

85. Chemical symbol for magnesium

86. Chemical symbol for radium


See solution below

 

2021 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.

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Physics & Science Theme Crossword Puzzle Solution for February 14th, 2021 - RF Cafe

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