1996 - 2016
BSEE - KB3UON
RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The Internet was still largely an unknown entity at the time and not much was available in the form of WYSIWYG ...
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November 1958 Popular ElectronicsTable of Contents
People old and young enjoy waxing nostalgic about and learning some of the history of early electronics. Popular Electronics was published from October 1954 through April 1985. All copyrights are hereby acknowledged. See all articles from Popular Electronics.
This crossword puzzle is a little trickier than some because it uses abbreviations rather than full words. Not everyone uses the same abbreviation, so some answers are a bit more subjective. For instance, many people abbreviate the word 'transformer' as 'xfmr,' while others use 'trans' or 'trr' (I use xfmr). Where you really have to be careful, though, is with evolutional changes in terminology as is the case for frequency units, where 'cps' was most often used in 1958 rather than today's 'Hz." Enjoy.
By John A. Comstock
Are you familiar with electronic: abbreviations? Here's a puzzle that pertains entirely to electronic: abbreviations and letter symbols. Instead of filling in complete words, you fill in only the abbreviation or letter symbol which you feel is correct. Work the puzzle and see how abbreviation-conscious you are.
1. Type of current that alternately changes direction of flow.
3. Type of junction transistor.
7. Type of resistor.
9. Type of speaker.
10. Broadcast band or broadcast in general.
11. Type of electron tube.
14. Effective voltage of a sine wave.
15. Device or circuit that maintains a constant voltage in a circuit.
17. Unit of power equal to one-thousandth of a watt.
19. Unit of current equal to one-thousandth of an ampere.
20. Unit of inductance.
21. Type of junction transistor.
23. Amplitude of carrier varies during modulation.
25. Electron tube terminology meaning series screen resistor.
29. Designation for mutual conductance.
34. Type of oscillator circuit.
35. Frequency range between 3 and 30 mc.
2. Type of radio wave transmission.
5. Carrier frequency is varied during modulation.
6. Type of frequency modulation.
8. Capacitor voltage rating.
9. Maximum working voltage that a capacitor can withstand without breakdown.
12. Transformer. transistor or transmitter.
13. Electron tube structure designation applicable only to glass tubes.
16. Speed of motors, turntables, etc.
18. Unit-time power consumption unit.
22. Opposite of positive.
23. Frequencies in audio range.
27. Magnetic potential difference.
28. Unit used to express audio levels.
30. Frequency range between 300 and 3000 mc.
32. In wave-guide propagation, H-waves.
33. Opposite of HI.
Solution to puzzle.
Posted May 22, 2014