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

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