Radio whine in 91 126 - 560SEC

[BCA Design]

My car has developed a moderate radio whine (rpm dependant) in the left channel. Could I have some help in determining where to diagnose/fix it. I just replaced the voltage regulator, which did nothing (but needed doing, the new unit's brushes were three times as long as the nubs on the old one!)

As always, I sure appreciate the advice and counsel!!!

Bruce

[droederer]

Check your grounding. Make sure the unit and the Ant. both have good solid grounds. You may also want to invest in an isolation coil for the +12V supply

Dave
A Clear Channel Radio guy.