commutators, relay contacts, and static changes
101. General Sources of Interference
collecting on the frame are other common
Generally, radio interference is generated
sources which in some way must be suppressed.
anywhere a spark occurs or where a high-fre-
quency current is present. A spark is a small
102. General Methods Used to Attain
amount of current jumping an air gap in re-
sponse to the force of a relatively high voltage.
Essentially, suppression is attained by pro-
The gasoline engine ignition system is a com-
viding a low-resistance path to ground for the
mon source. Magneto breaker points, generator