I have a confession to make regarding the puzzle titles. While all RF Cafe crosswords do in fact
use only my hand-entered dictionary of terms and clues (literally thousands accumulated over the years)
that pertain exclusively to science, engineering, chemistry, physics, mathematics, astronomy, etc.,
the choice for a particular title is to help attract search engines to the page. There is nothing deceptive
going on, just an attempt to exploit the nature of search engine algorithms that rank pages based on
meta tags coinciding with relevant keywords and phrases occurring on the page. Enjoy.
Reproduction of this puzzle without the express permission
of RF Cafe is prohibited. acr. = acronym, abbr. = abbreviation, pl. = plural, wds. = words

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1. Mr. Ohm's first name 5. One port on a BJT (pl.) 10. Ultraviolet (abbr.) 11. Facsimile
13. NASA's manned space capsule series that followed Mercury 16. Alternative name for a pi meson
17. 1/000 of an inch 19. Thing in a bill of material 20. BlackBerry or Palm for example (abbr.)
21. Steel, brass, aluminum, etc. 24. Nuclear explosion byproduct harmful to electronics (abbr.)
25. Akin to an EE, CE, AE, etc. 26. The Microwave Office software company, now NI (abbr.) 27.
One port of an amplifier 29. Chemical symbol for argon 30. Carrier-to-noise ratio (abbr.) 31.
Chemical symbol for californium 33. Maximum Usable Frequency 35. Web's most popular radio frequency
engineering site (2 ltrs. + 1 wd.) 38. Chemical symbol for calcium 40. Steady-state voltage reference
42. Ham radio organization (abbr.) 43. Type of component package (abbr.) 45. Bores a hole 47.
Unit of length equal to 5.5 yards 49. Chemical symbol for nickel 50. Exponent that returns the
original number 51. Network department (abbr.) 53. Ground fault interrupter (abbr.) 55. CDMA
Development Group (abbr.) 56. Opposite of I.D. 58. Online service (abbr.) 60. Creates a code
version of a semiconductor device 63. Stock symbol for Harris Communications 64. Title of the
magazine where Ralphie stuffs a Red Ryder BB gun ad for his mother to see 66. Early computer display
screen resolution (abbr.) 67. Name given to moderator cylinder used in nuclear reactor (pl.) 68.
Network device that takes commands from another similar device (pl.) 71. Type of data conversion
device (acr.) 73. Front edge of a wing (abbr.) 74. Mr. Packard's (HP) first name 75. _____
conductor |
1. Bushing used to direct the path of a pushrod 2. Electronic Variable Optical Attenuator (abbr.)
3. Portion of EM spectrum below microwaves 4. Software role playing type 6. Chemical symbol for
silver 7. Chemical symbol for selenium 8. Electromagnetic interference (abbr.) 9. Real estate
where radio equipment is located 12. Transmit Incremental Tuning (abbr.) 14. Electric enclosure
standard organization (abbr.) 15. Apply (as a voltage) 16. Parts per million (abbr.) 18. Chemical
symbol for lanthanum 21. Microwaves & RF magazine (abbr.) 22. Local Oscillator (abbr.)
23. Add two or more inputs 26. Describes continuously varying signals 28. Heat-shrink ______,
for insulating solder joints 30. Co-channel rejection ratio (abbr.) 32. A BPF specification (abbr.)
34. Software storage unit 35. Lines extending out from center 36. Chemical symbol for francium
37. Chemical symbol for einsteinium 39. Analog-to-Digital (abbr.) 41. Chemical symbol for aluminum
44. Chemical symbol for manganese 46. Plural of 47 across 48. Design for Manufacturability (abbr.)
52. Device to assist in the performance of a chore 54. Galilean moon 55. Encases in a protective
covering 56. The highest numerical exponent describes this property of a polynomial 57. Satellite
TV system 59. Termination 61. Type of current 62. Enhanced Graphics Adapter 63. Majority
carrier in p-type material 65. Large unit of apparent power (abbr.) 69. 1.602E-19 Joules 70.
Chemical symbol for silicon 72. Chemical symbol for copper |
See solution below
Take a well-deserved break and try your hand at some of these goodies.
Every word in the RF Cafe crossword puzzles is specifically related to engineering,
mathematics, and science. There are no generic backfill words like many other puzzles
give you, so you'll never see a clue asking for the name of a movie star or a mountain
on the Russia-China border.
All of these crossword puzzles were created using the fabulous
Crossword Express (now called "Magnum Opus") software.
2021 | 2020
| 2019 | 2018
| 2017 | 2016
| 2015 | 2014
| 2013 | 2012
| 2011 | 2010
| 2009 | 2008
| 2007 | 2006
| 2005 | 2004
| 2003 | 2002
| 2001 | 2000
| Sudoku
December 25 December 18 December 11 December 4
November 27
November 20
November 13
November 6
October 30 October 23 October 2 September 25 September 18 September 4
August 28
August 21
August 14
August 7
July 31
July 24
July 17
July 10
July 3
June 26
June 19
June 12
June 5
May 29
April 10
March 20
March 13
March 6
February 28
February 21
February 7
January 31
January 24
January 17
January 10
January 3

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