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About RF Cafe

Kirt Blattenberger - RF Cafe Webmaster

Copyright: 1996 - 2024
Webmaster:
    Kirt Blattenberger,

    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 World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while typing up your telephone line, and a nice lady's voice announced "You've Got Mail" when a new message arrived...

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Elementary Radio Quiz
December 1947 Radio-Craft

December 1947 Radio-Craft

December 1947 Radio Craft Cover - RF Cafe[Table of Contents]

Wax nostalgic about and learn from the history of early electronics. See articles from Radio-Craft, published 1929 - 1953. All copyrights are hereby acknowledged.

There is a good reason why Harold Glenn called this an "Elementary Radio Quiz." It appeared in a 1947 issue of Radio-Craft magazine. If you have been in the analog and RF electronics field for more than a couple years and don't score 100%, it has to be due to a misreading of accidental selecting of the wrong answer. I know what you're thinking - "The fool must have screwed up and missed at least one and is making excuses." Not this time - although I don't deny it could have happened. Anyway, it might be a fun quiz to pass out in the break room or maybe present it to a Ph.D. candidate during an interview ;-) "Bonne chance!," as Corporal Louis LeBeau might say!.

Elementary Radio Quiz

By Harold Glenn

Check your radio knowledge. A more advanced quiz will appear in an early issue.

 

1. Light and electricity are energy, and travel in the form of:

a. waves
b. frequency
c. amplitude
d. electrons

 

2. Which has the longest wave length?

a. light
b. heat
c. radio

 

3. The inductor is:

a. a coil
b. a condenser
c. an air core
d. an iron core

 

4. The to-and-fro surge of an electric current in a circuit is called:

a. detection
b. inductance
c. oscillation
d. capacitance

 

5. The loudspeaker changes:

a. sound into electric waves
b. r.f. to a.f.
c. a.f. to r.f.
d. electric waves into sound waves

 

6. In order to operate, the loudspeaker must have:

a. r.f. waves
b. a.f. waves
c. pure direct current
d. pure a.c. sine wave

 

7. The purpose of the detector is to change:

a. a.f. to r.f.
b. r.f. to a.f.
c. resonance to oscillation
d. oscillation to resonance

 

8. The action of the detector is called:

a. resonance
b. rectification
c. oscillation

 

9. Resistance in the tuned circuit causes:

a. distortion
b. rectification
c. broad tuning
d. oscillation

 

10. What is the frequency of 60-cycle, 117-volt, 100-watt house current?

 

Answers to Quiz on page 83


Quizzes from vintage electronics magazines such as Popular Electronics, Electronics-World, QST, and Radio News were published over the years - some really simple and others not so simple. Robert P. Balin created most of the quizzes for Popular Electronics. This is a listing of all I have posted thus far.

RF Cafe Quizzes Vintage Electronics Magazine Quizzes

 

 

 

Answers

1. a

2. c

3. a

4. c

5. d

6. b

7. b

8. b

9. c

10. 60 cycles

 

 

Posted December 3, 2020

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