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Transistor History Crossword Puzzle
December 18, 2016

On December 23, 1947, three engineers working at Bell Laboratories demonstrated the world's first semiconductor transistor that produced positive gain. Their names, along with the configuration of their transistor, are buried in the puzzle along with scores of other science and engineering related terms. In fact, every word contained herein has been hand selected by me and there is a money back guarantee if you ever find one not related to mathematics, physics, mechanics, astronomy, chemistry, and all the other sciences. Enjoy!

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

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

Transistor History Crossword Puzzle for December 18, 2016 - RF Cafe

1. Electrical connection point

6. Science of assuring operation amid dense EM background noise (abbr.)

9. William ________, along with 39-Across and 99-Across, announced their invention of the transistor on December 23, 1947

15. Automatic Calibration System (abbr.)

16. Unwanted 60- or 120- Hz modulation due to poor power supply filtering (2 wds.)

18. Radio term for indicating the end of a transmission segment

20. Chemical symbol for polonium

21. ___/IP scheme for networked connectivity

23. Akin to WAC, only just in America

24. 10 decibels

25. Wireless LAN

26. Ratio of circumference to diameter

28. Having power applied (slang)

30. Airport Surveillance Radar (abbr.)

32. Software drafting tool (abbr.)

33. Sudden, brief increase in wind speed

34. Current summing point

37. International Reply Coupon (abbr.)

39. John _______, along with 9-Across and 99-Across, announced their invention of the transistor on December 23, 1947

43. Unit of length (abbr.)

44. Chemical symbol for krypton

45. The semiconductor type used by 9-, 39-, and 99-Across for their transistor

48. A type of average (pl.)

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

52. Chemical symbol for molybdenum

53. Unit of atmospheric pressure (abbr.)

54. Unit of inductance (abbr.)

56. Chemical symbol for cadmium

57. Software drafting tool (abbr.)

59. Opposite of I.D.

62. 1E6 nanoseconds

64. Type of antenna constructed from one or more winding(s) of wire or rods (pl.)

67. First American woman in space (2 wds.)

71. Multifunctional silicon devices (abbr.)

73. Internet protocol (abbr.)

74. 51 Down + _______, the configuration of the 1947 transistor

76. 1/000 of an inch

77. Most protruding part of planetary rings as seen from distance

78. RF ____, the world's best engineering website

79. Cellphone band just below PCS

80. Greek letter

82. Attenuator

84. Modulation type (abbr.)

85. The "D" in RFID (pl.)

87. Digital transmission figure of merit (abbr.)

90. Last statement in a BASIC program

91. Crystal filter type (abbr.)

92. Filter type that blocks frequencies in a specified band (abbr.)

93. Used logic gates

95. _____-Carlo analysis

98. Permeability-tuned oscillator (abbr.)

99. Walter _______, along with 9 Across and 39 Across, announced their invention of the transistor on December 23, 1947

100. Direct Memory Access (abbr.)

101. Its chemical symbol is Sm

1. Recording onto magnetic media

2. Engineering Change Order (abbr.)

3. Type of flip-flop

4. Foot/12

5. Chemical symbol for silver

6. Exalted-Carrier Single Sideband (abbr.)

7. Unit of inductance (abbr.)

8. Mr. Piper's famous yellow airplane

10. 3 MHz to 30 MHz

11. Not hot

12. Large unit of apparent power (abbr.)

13. One component of volume

14. Chemical symbol for erbium

16. A common battery cell size

17. Akin to an EE, CE, AE, etc.

19. Fuel additive

22. The tip of a PCB probe (pl.)

25. Computer interconnection scheme (abbr.)

26. Form of digital phase modulation in which the phase of the RF signal depends on the modulating code (abbr.)

27. Optical storage medium

29. Adjust

31. Type of data storage IC

32. World's largest yearly convention of gadget and device manufacturers (abbr.)

35. Original Equipment Manufacturer (abbr.)

36. Electromagnetic (abbr.)

38. Chemical symbol for copper

40. One component of a complex number (abbr.)

41. Type of data conversion device (abbr.)

42. Last keyword in a BASIC subroutine (pl.)

46. A common battery cell size

47. Elementary particle

49. Second largest asteroid

51. _____ + 74 Across, the configuration of the 1947 transistor

55. Having power applied (slang)

57. Abruptly limit the amplitude of a signal

58. Chemical symbol for dysprosium

60. Direct Digital Synthesis (abbr.)

61. Rechargeable battery type (abbr.)

63. International phonetic alphabet letter "S"

64. Line of Sight (abbr.)

65. Last stage in a transmitter (abbr.)

66. Special diode type that can be switched (abbr.)

68. Modulation type (abbr.)

69. Chemical symbol for radium

70. Electrically Alterable Read Only Memory

72. Person responsible for program spending (abbr.)

74. Imaging device (abbr.)

75. Greek symbol commonly used to represent angles

79. This calculus operation yields voltage across a capacitor

81. Exponent that returns the original number

83. Digital intelligence

86. Semiconductor device type (abbr.)

88. Electromagnetic (abbr.)

89. Unit of length equal to 5.5 yards

92. Unit of heat

93. Type of logic gate

94. Opposite of a LO

96. Home state of Los Alamos lab (abbr.)

97. Chemical symbol for gallium

98. Ratio of circumference to diameter

See solution below


Visit the Crossword Express website - RF CafeTake a break from the drudgery by trying 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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