Okay, I can admit when I was wrong. It IS the power invertor that is causing it. Now... how do I get rid of it? Will a noise filter or something do it? Its really annoying and I want to get rid of it.
BTW, incase you didn't read the earlier post it is a MP3 PC in my car running off a 300Watt power invertor. I now have shielded cables running to the stereo, which seemed to of improved it, but didn't get rid of it.
Thanks,
Douglas

 

I doubt a noise filter will be able to clean it up. You might try different invertors or hardwiring the invertor to the batt and a good ground, but as long as you have that invertor, you'll prolly be stuck with the noise. This is a unique situation-The car is in DC, the invertor converts to AC, then the power supply in the PC converts back to DC. If you could somehow eliminate the DC-AC-DC conversion, your noise problems would vanish.

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[This message has been edited by Justins86bird (edited November 14, 2000).]