RADIO CAPACITOR: VOLTAGE REGULATOR

TECH NOTES:

Ignition systems, charging systems, electrical devices, and switches can create magnetic pulses. These pulses are in the same frequency range as AM-band radio signals, resulting in radio "noise".

This radio noise suppression capacitor diverts this noise to ground so it isn't heard through the radio's speakers as an annoying buzz or whine.

There can be several radio capacitors in a vehicle.

As with any electrolytic capacitor, radio capacitors have a limited life and will degrade over time as the internal electrolyte evaporates; especially in areas of temperature extremes (hot or cold).