Voltage Regulator Noise - Vertex Standard VXD series Installation Manual

Chapter 2 Reducing Noise Interference
Step 1.
Mount Capacitor to
(0.5µF Coaxial Type)
under alternator
ground screw.

2.4.4 Voltage Regulator Noise

This type of interference is characterized by erratic popping noises which change only slightly with
changes in engine speed. The noise is generated by arcing in the vibrating breaker contacts of the
voltage regulator. It can be suppressed by connecting a 0.5 μF coaxial capacitor in the battery and ar-
mature leads of the voltage regulator (see Figure 2-6).
Disconnect the battery ground terminal before attempting to connect components to the volt-
age regulator.
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Figure 2-5 Alternator Whine Suppression
Step 2.
Disconnect wire from
battery post and connect
to capacitor using
lockwasher and nut.
Caution:
Do not connect
capacitor to field terminal.
Step 3.
Connect wire lead to capacitor
using lockwasher and nut.
Step 4.
Connect capacitor
lead to battery post.