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Vacuum Tube Crossword Puzzle
November 16, 2014

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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Vacuum Tube Crosword Puzzle, November 16, 2014 - RF Cafe


1. Vacuum tube element placed between control grid and plate in a pentode (2 wds.)

7. Chemical symbol for selenium

8. Electromechanical apparatus used to turn an antenna (pl.)

10. Chemical symbol for argon

12. Part of a FOR loop

13. Amateur Radio Emergency Service (abbr.)

16. Decibels above or below a dipole antenna (abbr.)

17. Automatic network analyzer (abbr.)

19. Dielectric material used to form a hermetic seal for thru-wall conductors

22. Straight line joining the center of a circle to the circumference

26. Stock symbol for Microsoft

28. Create a power supply output w/o a ground reference

30. Chemical symbol for helium

31. Common average used for sinewaves (abbr.)

34. Unit for 1,000,000 watt-seconds (abbr.)

36. Co-channel rejection ratio (abbr.)

37. Online service

38. Mr. Tesla's first name

39. Type of high frequency diode (abbr.)

41. Small unit of capacitance (abbr.)

42. Fail-____ switch

44. Negative temperature coefficient (abbr.)

45. Chemical symbol for polonium

46. Chemical symbol for lead

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

49. Frequency at which XL = XC

54. ____RF, passive RF component manufacturer in Huntersville, NC

55. A common battery cell size

58. Dual Tone Multi-Frequency

59. Army-Navy specification prefix

61. Software engineering tool (abbr.)

63. Compound used in vacuum tube to reduce trace elements of gas (pl.)

64. With 53 Down, part of this website's title

2. One factor of a polynomial

3. Unit of time (abbr.)

4. Equipment

5. Deutsche Industrie Normenausschuss

6. Pulse used to initiate a circuit action

9. Unit of length equal to 5.5 yards (pl.)

11. A disk operation

13. Agilent's EE design software (abbr.)

14. Chemical symbol for tin

15. 36 inches

18. A non-commercial radio service as set by a recognized cognizant government agency (2 wds.)

20. Digital storage oscilloscope (abbr.)

21. Stock symbol for Lockheed Martin

23. Asynchronous Transfer Mode (abbr.)

24. Band between RF and BB

25. FCC's Universal Licensing System (abbr.)

27. Unit of inductance (abbr.)

29. Computer character set (abbr.)

31. Vaccum tube type that permits current flow in only one direction

32. Miniature threaded RF connector

33. Vacuum tube with three electrodes

35. German astronomer who developed a mathematical relationship between planetes and distance from sun (2 wds.)

38. National Television System Committee (abbr.)

40. 300 kHz to 3 MHz

43. Chemical symbol for francium

45. Min-to-max voltage of a waveform (abbr.)

46. Greek letter

47. Ham's code for "Answer in prearranged order."

48. Vacuum tube element that causes free electrons for current flow

50. 1.602E-19 Joules

51. 1e-6 mA

52. Software drafting tool (abbr.)

53. With 64 Across, the world's best engineering website

56. Yttrium Aluminum Garnet

57. Precision approach radar (abbr.)

60. Chemical symbol for neon

61. European equivalent to the U.L.

62. Chemical symbol for einsteinium


See solution below















Vacuum Tube Crosword Puzzle Solution, November 16, 2014 - RF Cafe

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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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