August 1962 Popular Electronics
Wax nostalgic about and learn from the history of early electronics. See articles
published October 1954 - April 1985. All copyrights are hereby acknowledged.
OK, class, put your books
away and take out a pencil. Spread your chairs out because we're going to have a
short test today. A collective sigh permeates the room. Remember those days? I still
have nightmares over those moments, and they were decades ago for me. At least this
"Electronic Noise Quiz" from the August 1962 edition of Popular Electronics
won't affect your GPA. Sometimes PE's quiz illustrations are kind of hard to interpret,
but this one does a pretty good job (except item 'E', but I'm not telling what it
is since nobody helped me). You will need a fairly diverse background in consumer
type electronics to do well, and having a few gray hairs will probably help as well.
Good luck. BTW, my score was a somewhat embarrassing 80%.
Electronic Noise Quiz
By Robert P. Balin
The noises that electrical and electronic devices make can indicate normal operation
or trouble, and a clever technician trains his ear to distinguish one from the other.
Test your noise knowledge by matching the 10 noises listed below with the drawings
(A-J) of the devices that usually produce them.
See answers below.
Popular Electronics published many quizzes over the
years - some really simple and others not so simple. Robert P. Balin created
many of the quizzes. This is a listing of all I have posted thus far.
- Electronics Physics
Quiz - March 1974
- A Baffling Quiz
- January 1968
- Electronics IQ
Quiz - May 1967
- Plug and Jack
Quiz - December 1967
Switching Quiz - October 1967
Angle Quiz - September 1967
Electronics Quiz - July 1967
- Bridge Circuit
Quiz -December 1966
- Diode Function
Quiz - August 1965
- Diagram Quiz,
- TV Trouble Quiz,
- Electronics History Quiz,
- Scope-Trace Quiz,
Circuit Analogy Quiz, April 1973
Test Your Knowledge of Semiconductors, August 1972
- Ganged Switching
Quiz, April 1972
- Lamp Brightness
Quiz, January 1969
- Lissajous Pattern Quiz, September 1963
Quizoo, October 1962
- Electronic Photo Album Quiz, March 1963
- Electronic Alphabet Quiz, May 1963
- Quiz: Resistive?
Inductive? or Capacitive?, October 1960
- Vector-Circuit Matching Quiz, June 1970
Quiz, September 1961
- RC Circuit Quiz,
- Diode Quiz, July
- Electronic Curves Quiz, February 1963
- Electronic Numbers Quiz, December 1962
- Energy Conversion Quiz, April 1963
- Coil Function
Quiz, June 1962
- Amplifier Quiz
Part I - February 1964
Quiz - February 1967
Frequency Quiz - September 1965
Metals Quiz - October 1964
Measurement Quiz - August 1967
Quiz, June 1966
Geometry Quiz, January 1965
Factor Quiz, November 1966
Math Quiz, November 1965
- Series Circuit
Quiz, May 1966
Quiz, March 1966
Analogy Quiz, November 1961
Coupling Quiz, August 1973
- Electronics Analogy Quiz, August 1960
- Audio Quiz, April
- Electronic Unit
Quiz, May 1962
Circuit Quiz, June 1968
- Quiz on AC Circuit Theory, December 1970
- Magnetic Phenomena Quiz, February 1962
- Electronics Geography Quiz, April 1970
Menu Quiz, August 1963
- Electronic Noise Quiz, August 1962
- Electronic Current Quiz, October 1963
- Electronic Inventors Quiz, November 1963
- Resistor Function
Quiz, January 1962
- Electronic Measurement Quiz, January 1963
- Vacuum Tube Quiz,
- Kool-Keeping Kwiz, June
- Find the Brightest
Bulb Quiz, April 1960
Electronic Noise Quiz Answers
1 - B) Transformer buzz is usually produced by the vibration of loose laminations
in the transformer's iron core.
2 - H) Relay chatter occurs when the current value in the relay coil is
somewhere between the normal operating value and the drop-out value.
3 - I) Turntable rumble is a low-frequency vibration mechanically transmitted
to the phono cartridge pickup by the turntable drive mechanism.
4 - G) Keying chirp is caused by undesirable variations in transmitted
frequency when the transmitter r.f. oscillator is keyed.
5 - J) Armature growl is a symptomatic sound made by an armature containing
shorted turns when placed on a test-stand device called a "growler."
6 - A) Loudspeaker boom is produced by self-oscillation of the speaker
at a low-frequency resonant point.
7 - E) Needle scratch is due to a worn stylus point. Dirt and dust on a
record or a defective record can produce the same sound.
8 - C) Tube hiss is due to electron collisions in an irregular electron
stream caused by an uneven cathode coating. Although a tape recorder (F) and a car
generator (D) will also produce hiss, they are not the correct answers for question
8, but for 9 and 10 which follow.
9 - F) Tape recorder wow is comprised of slow variations in the pitch of
recorded sounds caused by irregular slippage or drag in the tape drive mechanism.
A turntable (I) with a friction drive will also produce wow sounds, but (I) has
already been matched with question 3.
10 - D) Generator whine is due to commutator sparking and changes in frequency
with varying engine speeds, and it sometimes interferes with reception in or from
Posted May 22, 2019