Noise interference from auto air adapter
After hearing what people had to say about using an inverter vs an auto air adapter, I decided to take my inverter out and replace it with an auto air adapter made specifically for my laptop. Here's my setup:
IBM T42 thinkpad
Port Replicator II docking station
1/8 audio out to RCA plugs - connects to aux in on my head unit.
When everything was powered by an inverter, I got no noise or screen interference at all. The only noise I got was the little fan on the inverter which keeps the inverter from overheating.
After switching to the auto air adapter, I noticed a few lines of interference during bootup on the screen, and noticeable noise interference when I bring up road runner. The noise interference is like a wave, fades in then fades out repeatedly. When I play an mp3 which is a ballad, it becomes more noticeable.
I read threads where people were having the opposite effect, interference with an inverter but none with the auto air adapter, but never the other way around. The only change I made was the adapter. My question is, is anyone else experiencing this, and if so, what could be done to suppress the noise interference?