Engineering & Science Crossword Puzzle - January 21, 2009


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January 21, 2009 Engineering & Science Crossword Puzzle

Note: A standard for crossword puzzles is when all words in a clue are capitalized, the solution is the abbreviation or acronym for that clue; e.g., Alternating Current = AC.

2009 Engineering & Science Crossword Puzzles

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

ACROSS 1. Part of a directive antenna that derives energy from mutual coupling with the driven element, 2 wds., pl. 8. Special diode that can be switched, abbr. 9. Variable crystal oscillator, abbr. 10. Circuit containing a mixture of technologies, pl. 15. Attenuator topology 17. Family of ICs with a certain component density level, abbr. 19. Min______ and Max_____, in a Karnaugh map 20. 1/1000000 prefix 22. Chemical symbol for einsteinium 23. Deutsche Industrie Normenausschuss 24. Chemical symbol for polonium 25. 1's and 0's 27. Increase voltage linearly 30. Unit of length equal to 5.5 yards, pl. 31. Set of poles 32. One type of electron spin 34. Minutes of Use 35. Semiconductor and calculator company, abbr. 36. Effect (named after its discoverer) that is the variation in the width of the base in a BJT due to a variation in the applied base-to-collector voltage 39. Precipitate 41. Digital Enhanced Cordless Telephone 42. Society of Civil and Structural Engineers 43. Devices on an axle used to hold a wheel in place, pl. 44. Broadband over Power Lines, a Ham's nemesis 46. Automatic Send-Receive 48. Highest frequency at which a vertically incident radio wave will return from the ionosphere, 2 wds.	DOWN 2. Type of flip-flop 3. In geometry, what kind of an angle has less than 90 degrees 4. Chemical symbol for strontium 5. 1e3 uV 6. Cabinet manufacturer in Cincinnati, OH 7. Chemical symbol for nobelium 10. Amateur radio operators 11. 36 in., pl. 12. One divided by a number 13. Digital Voltmeter 14. Describes when a synchronous motor loses "lock" 16. Physical quantity defined as force per unit area 18. Constellation : The scorpion 19. Vacuum tube with three control grids 21. Resistor vendor in Skokie, IL 25. Chemical symbol for bromine 26. Time delay, abbr. 28. A common battery cell size 29. Chemical symbol for praseodymium 33. Type of programmable device, abbr. 35. Total Access Communication System 37. Change connector type 38. Elemental compound used for microwave frequency reference oscillators, abbr. 39. Bluetooth modules & ICs vendor in Richardson, TX 40. One of four lines used in ferrite core memories 44. Chemical symbol for bismuth 45. Chemical symbol for lithium 46. Chemical symbol for gold 47. Chemical symbol for radon

Answer below


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