Stereo background noise.

[fost9508]

Guys,

I recently installed a new stereo in my car with one little annoyance. While I am listening to the radio I can hear faint popping crackling sound through the speakers, sort of like your radio isn't set perfectly on the station. Anyway if I turn the car off it sounds great....What I have done so far is checked to see if the battery is getting any alternating charge, kinda a way to check to see if the alternator is going bad, and it checked out....any other ideas? Spark plugs are an obvious source of noise, but I thought modern plug wires were made such that they don't give off frequency noise?????

Anyway thanks again.

fost9508

 

[87MustangGT5.0]

In my brothers old 87 GT, we had an old stereo in there from the previous owner, and when you would accelerate, you could hear noises in the speakers getting louder with the RPM's. Then we moved the ground to another spot and it stopped.

 

[fost9508]

It is nothing like that, but I will try moving the ground. It doesn't increase with RPM and it only happens when using the radio...not with CD's. Where is the best place to land the ground wire?

thanks

 

[HISSIN50]

yeah, check the ground out. if one has an insufficient ground, on some stereos it will try to recruit the antenna as a ground.

any decently heavy and CLEAN metal inside the dash should work. if you want you can ohm the ground out to ensure it is clean.

good luck.

 

[87MustangGT5.0]

Yeah I think that the ground could effect more than what I said, so it still could be a potential problem.

 

[HISSIN50]

yep, gotta remember that juice flows from ground to positive. you can hook a powerplant to the positive battery cable and if ground is lacking, all is lost.

once a good ground is found, the antenna can stop being a (poor) ground and that might clear up the static heard only in the radio reception.

 

[Curse]

Have you tried using an noise silencer for electromagnetic interference or RF noise. My uncle has a system in his truck and he had the same problem. We use an MSD RF noise reducer and it was gone.