Since 2000, I have been creating custom engineering- and science-themed crossword puzzles for the brain-exercising benefit and pleasure of RF Cafe visitors who are fellow cruciverbalists. The jury is out on whether or not this type of mental challenge helps keep your gray matter from atrophying in old age, but it certainly helps maintain your vocabulary and cognitive skills at all ages. A database of thousands of words has been built up over the years and contains only clues and terms associated with engineering, science, physical, astronomy, mathematics, chemistry, etc. You will never find a word taxing your knowledge of a numbnut soap opera star or the name of some obscure village in the Andes mountains. You might, however, encounter the name of a movie star like Hedy Lamarr or a geographical location like Tunguska, Russia, for reasons which, if you don't already know, might surprise you. cruciverbalist: [noun] cruci- ("cross") + verbal ("words") + -ist ("agent, person") -- A person who constructs or works crosswords.
Reproduction of this puzzle without the express permission of RF Cafe is prohibited. acr. = acronym, abbr. = abbreviation, pl. = plural, wds. = words 
<click for full size to print> 1. Ceramic Dual Inline Package 4. Any mathematical statement that declares the values of two mathematical expressions to be equal 8. Type of data conversion device (abbr.) 10. Radio frequency interference (abbr.) 11. Type of graph with a circular grid 13. Discipline for aircraft navigation in low visibility environments (abbr.) 15. RF ____, the world's best engineering website 17. This is a subatomic particle having a mass between that of an electron and a proton 18. A BPF specification (abbr.) 19. Constellation : The southern cross 21. Chemical symbol for copper 22. BS__ - the degree held by many RF Cafe visitors 23. Numerical prefix for 10E2 25. Early programming language 27. PC follower 28. Rotate about the vertical axis 29. "Peace Prize" endowment creator, who made his fortune on the discovery of dynamite 32. Unit of time (abbr.) 33. Unit of liquid measure (abbr.) 34. A common battery cell size 35. Sends a file over a network (abbr.) 37. The constellation in which Canopus is located 38. European equivalent to the U.L. 40. Chemical symbol for erbium 41. Ratio of circumference to diameter 42. English scientist who first performed the famous double slit experiment and also played a major role in deciphering the Rosetta Stone 43. Type of chart 44. Chemical symbol for beryllium 45. Negatively charged ion 47. Traditional term for a person who enjoys helping newcomers get started in ham radio - a mentor 49. Type of current 50. Chemical symbol for ruthenium 51. Compliment to a pole in a transfer function 53. Chemical symbol for berkelium 54. Just entering the nonlinear region 56. Length times width 59. Automatic Calibration System (abbr.) 61. Indium Gallium Phosphor semiconductor (abbr.) 62. Radio Direction Finding (abbr.) 64. Virtual Private Network 66. ________ Time, how long a stepped signal takes to go from 10% to 90% of its full-scale value 67. Creates a code version of a semiconductor device | 1. Complex Instruction Set Computer 2. Impurity in a semiconductor 3. Chemical symbol for palladium 4. Official engineering change document (abbr., pl.) 5. Seventh planet from the sun 6. Coefficient of temperature (abbr.) 7. Switch position 9. Highest point 10. Part of this website's title 12. On a waveform, a _____ min or max 13. Current-voltage phase mnemonic 14. Electronic device that permits current flow in only one direction 16. Length times width (pl.) 17. Greek letter (micro) 18. Method of self-detection and self-fixing transmission of digital data (abbr.) 20. Unit of electromagnetic radiation 23. Name of the curve formed by the intersection of a cone with a plane at a smaller angle with its axis than the side of the cone 24. Pure carrier (abbr.) 25. Radio navigation reference signal 26. Number that has no fractional part 30. Stock symbol for Boeing 31. Chemical symbol for cesium 33. Type of matrix barcode used with laser scanning(abbr.) 36. Chemical symbol for praseodymium 37. Analog-to-Digital (abbr.) 39. Chemical symbol for europium 41. _____-wise linear 42. The scientist who first performed the "double slit" experiment 43. Related to FM by a differential 45. Abbreviation for acknowledge (also a common word used by Bill the Cat) 46. Type Mylar airframe structure covering (2 words) 48. Added a termination 49. Logarithmic unit of ratio (abbr., pl.) 51. Antenna type derived from simple weighted wires dropped from Zeppelin airships 52. Radio signals from the cosmos (abbr.) 55. File menu option 57. Microwaves & __ magazine 58. Automatic Packet Position Reporting System (abbr.) 60. Software engineering tool (abbr.) 63. Filter type that blocks frequencies below and above a specified band (abbr.) 65. Home state of Los Alamos lab (abbr.) |
See solution below

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