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January 21, 2009 Engineering & Science Crossword Puzzle
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[miscellany/crosswords/z-crosswords-2009-common.htm]
Reproduction of this puzzle without the express
permission of RF Cafe is prohibited.
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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.
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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
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See solution below
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