Radio grounding?

[remusrm]

Even after I got the antenna from Alex1a1f (thank you again) my Display Audio (SDA) System has lots of static. Is there way I can ground it to eliminate the static line noise?

[Eggman]

What other electronics do you have running - phone, GPS, camera & power supply? Is this interference on all radio frequencies or only certain ones? Which band - AM or FM?

[remusrm]

What other electronics do you have running - phone, GPS, camera & power supply? Is this interference on all radio frequencies or only certain ones? Which band - AM or FM?

I have a car power adapter like this one:

https://www.amazon.com/Importer520-D...mp+and+2.1+amp

I run the phone on the 2.1 amps and 1.0 amps is the GPS. it does whine in some areas but even being out the distortion is awful. The line noise happens usually under power lines.

[foama]

I have a car power adapter like this one:

https://www.amazon.com/Importer520-D...mp+and+2.1+amp

I run the phone on the 2.1 amps and 1.0 amps is the GPS. it does whine in some areas but even being out the distortion is awful. The line noise happens usually under power lines.

That power adapter is a switched-mode voltage regulator, and those always produce noise, especially at lower frequencies! Just pull it out and check if the static is gone.

[remusrm]

That power adapter is a switched-mode voltage regulator, and those always produce noise, especially at lower frequencies! Just pull it out and check if the static is gone.

Nope its not gone. Only difference is when driving by power lines makes less noise being pulled out.

[foama]

Nope its not gone. Only difference is when driving by power lines makes less noise being pulled out.

First of all, is the static mainly from external sources, or is it from sources inside, such as the blower fan, or OBD/bus noise?
Is it on AM, FM or both? How good is reception generally? Does the situation change with the ignition turned all the way off?

Very important: Have you added anything whatsoever electronics to the car? If yes, have you removed it to check yet?

Done that, there are two equally important things to check out next when searching for static causes:

A) grounding of the radio itself:
The actual ground connection of the radio to the chassis must be electrically perfect. Just connecting the antenna cable to chassis on the antenna side is good for the antenna, but not enough for grounding a radio. Below the radio, there is a horizontal metal tube/brace across the underside of the dash. That brace is connected to the chassis near the front door hinges on either side, and offers a good electrical ground. You could connect a short flexible cable to that tube, the other end leading to the metal case of the radio. Removing (unclipping) the glovebox helps getting better access.


B) grounding of the antenna at its base:
The antenna is an active typ, meaning it has a small whip and an electric buffer amp. To improve the grounding of the antenna, the shield of the coax leading away to the radio base, must be connected from a point right at the base of the antenna, to the chassis via a short and not too thin cable. If that conection is bad, you get lots of noise right there. On mine, I removed the rubber seal on the upper part of the hatch for better access to the underside of the antenna, and put a proper grounding in place. I had to remove a little of the outer insulation of the coax to be able to swiftly solder a grounding lead to it. My reason for doing that was, I like listening to BBC Radio4 on 200kHz long wave while driving in central Europe.

When those two points have been taken care of, you will probably likely have things working. If not, we can continue from there.

[Eggman]

Wow I'm at a loss. Without listening to the noise, I'm really limited in figuring out what might be the cause. These can be tough problems to figure out, and I usually begin by eliminating the other electronics that were added over time.

My radio is fairly quiet, though I don't listen to it much.

That being said, I have noticed some interference being picked up by my radio. It sounds like some form of digital communications, and I can hear it plainly when I tune in to 91.9 FM. I wonder if it is something particular to the Mirage and if everyone else gets it too.

[remusrm]

Wow I'm at a loss. Without listening to the noise, I'm really limited in figuring out what might be the cause. These can be tough problems to figure out, and I usually begin by eliminating the other electronics that were added over time.

My radio is fairly quiet, though I don't listen to it much.

That being said, I have noticed some interference being picked up by my radio. It sounds like some form of digital communications, and I can hear it plainly when I tune in to 91.9 FM. I wonder if it is something particular to the Mirage and if everyone else gets it too.

You were right to call it interference or low reception like sound. Its odd since stay in the background even if I am close to the station. In FM is less pronounced but in AM gets quite distorted.

[Eggman]

That sounds like power line interference but again, it's hard to tell without hearing it.

Tonight I scanned my FM radio range and I heard my interference on several frequencies with no broadcasting stations.

[remusrm]

That sounds like power line interference but again, it's hard to tell without hearing it.

Tonight I scanned my FM radio range and I heard my interference on several frequencies with no broadcasting stations.

This is the noise!

http://www.filedropper.com/soundreco...01-17-20-05-03