For the sake of avid cruciverbalists amongst us, each week I create a new crossword puzzle that has a theme related to engineering, mathematics, chemistry, physics, and other technical words. Clues in this puzzle with an asterisk (*) are pulled from this past week's (3/27 - 4/2) "High Tech News" column on the RF Cafe homepage. Enjoy!
Reproduction of this puzzle without the express permission of RF Cafe is prohibited.
acr. = acronym, abbr. = abbreviation, pl. = plural, wds. = words 
1. Scientists Evade the Heisenberg ___________ Principle *
9. Unit of resistance
10. Radio Amateurs of Canada (abbr.)
11. Attenuator
12. One port of an amplifier
13. Mate to an RX
17. Chemical symbol for krypton
19. Internet protocol (abbr.)
21. WikiLeaks Vault 7 Leak Claims CIA Bugs 'Factory Fresh' _______ *
23. Chemical symbol for silver
24. Ubiquitous antenna structure along interstate highways (2 wds.)
27. Read-only (abbr.)
29. Hz
31. Prefix for 10E-18
32. Chemical symbol for californium
33. Type of matrix barcode used with laser scanning(abbr.)
37. Cellphone band directly above DCS
38. Chemical symbol for francium
39. C.I.A. Developed Tools to Spy on Mac Computers, _________ Disclosure Shows *
43. Trigonometric function equal to the ratio between the side opposite a given angle, and the hypotenuse
44. A digital counter input line to establish an initial value
47. Table type used in software for storing selectable values
49. Ad-hoc on demand distance vector (abbr.)
51. Change phase from solid to vapor
56. Unit of time (abbr.)
57. Base 16 number system (abbr.)
58. Network department (abbr.)
59. Ratio of circumference to diameter
60. Roadmap Says ____ Ends ~2024 *
61. Common plastic insulation type (abbr.)
66. Chemical symbol for platinum
67. _________ Couple are 1st Foreigners to Own U.S. Radio Stations *
71. Unit of length (abbr.)
72. Nokia Confirms Its New _______ Phones to Hit U.S. Shelves *
74. Chemical symbol for radium
75. Amateur radio abbreviation for the Oceania region (abbr.)
76. Unit of frequency (archaic, abbr.)
78. Chemical symbol for palladium
79. Heterojunction Bipolar Transistor
82. Early computer display screen resolution (abbr.)
84. Readability, Signal, and Tone (QoS report type)
86. Startup Develops Polymer ___________ for Safer, Longer-Lasting Batteries * | 1. Unit of inductance (abbr.)
2. Nordic Mobile Telephone
3. Chemical symbol for erbium
4. Cuba Institutes New Amateur _____ Regulations *
5. Coefficient of temperature (abbr.)
6. Opposite of O.D.
7. Test point (abbr.)
8. A major search engine
9. Switch position
12. Infrared (abbr.)
14. Amateurese for "wife"
15. One type of electron spin
16. Device used to dissipate excess joule energy from an assembly (2wds., pl.)
17. Mass unit (abbr.)
18. Chemical symbol for beryllium
20. Printed Wiring Board (abbr.)
21. International Reply Coupon (abbr.)
22. Stock symbol for Harris Communications
23. __________ Test - used to verify compliance with manufacturer published specifications
25. Filter type that blocks upper frequencies (abbr.)
26. Test equipment (abbr.)
28. How to Escape __________ Prison *
30. Form of digital phase modulation in which the phase of the RF signal depends on the modulating code (abbr.)
31. Automatic Calibration System (abbr.)
33. Ham's code for "Shall I send more slowly?"
34. Semiconductor and calculator company (abbr.)
35. Chemical symbol for silicon
36. Morse Code for "from"
38. Parabolic antenna-to-waveguide interface component (pl.)
39. Weight (abbr.)
40. Adjustment dial
41. Plural of locus
42. Asynchronous Communication Interface Adapter (abbr.)
45. Chemical symbol for europium
46. Local Oscillator (abbr.)
47. Front edge of a wing (abbr.)
48. One port of an amplifier
50. Amateur radio operator who is qualified to administer Amateur Radio licensing examinations (abbr., pl.)
52. Ultra High Voltage (abbr.)
53. Chemical symbol for lawrencium
54. Chemical symbol for molybdenum
55. Chemical symbol for thallium
61. Permeability-tuned oscillator (abbr.)
62. Software drafting tool (abbr.)
63. Airport Surveillance Radar (abbr.)
64. Chemical symbol for strontium
65. Electrical safety organization (abbr.)
66. Device used to make contact with a point to be measured
68. International phonetic alphabet letter "T"
69. A type of digital modulation (abbr.)
70. People Who Think They're 'Tech-Savvy' 18% More Likely to Be Hit by __ Theft *
71. A BPF specification (abbr.)
73. Network department (abbr.)
75. Opposite of I.D.
77. Type of computer display (abbr.)
78. Chemical symbol for platinum
80. Chemical symbol for thallium
81. Type of current
82. Chemical symbol for chromium
83. Chemical symbol for aluminum
85. Chemical symbol for selenium |
See solution below
| 
