Power noise - the horror!!!
I just did the first test of my carputer and (drum roll) - REALLY bad power noise! Here is my setup:
- Compaq Presario 5250 (K6-2 400)
- 110W proprietary power supply
- 140W Whistler inverter
- FM Modulator
Now, I know what you're all thinking - this is a recipe for disaster! An inverter AND an FM modualtor, this guy deserves whatever happens to him!
When I hooked everything up, there was an awfull amount of noise comming through the stereo, and I could hardly hear the music from the computer. I added a ground loop isolator, but this did not help. I tried hooking up a portable CD player to the modulator to see if the computer was the problem, and as soon as I turned off the inverter the noise went away and it sounded great, so I know that the inverter is what is causing the noise comming through the modulator. How can I get rid of this? I am thinking of something like this:
It's a power noise filter from radio shack (part #270-051) and it's rated for 10A. Would this help if I installed it between the FM modulator and the 12V from the car?
Sorry for the really long post, but please help! I'm so close to having my install completed, plus I'm going on a long roadtrip this weekend and desperately want a few thousand songs at my disposal!!