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Picking up spark interference in speakers UPDATED

Discussion in 'Audio' started by daleearnhardt01, Apr 11, 2003.

  1. daleearnhardt01

    daleearnhardt01 1/2 ton status

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    Okay so after doin some more fiddlein round with it I see that it is the antenna that is messed up. I dont pick up any of the interference with a CD playin. Could it still be a ground issue? What should I do next?
     
  2. Z3PR

    Z3PR Banned

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    Re: Picking up spark interference in speakers

    [ QUOTE ]
    Circuit City where its underwarrany and let them deal with it.

    [/ QUOTE ] If it's under warrany, lrt them figure it out.
     
  3. Greg72

    Greg72 "Might As Well..." Staff Member Super Moderator

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    Re: Picking up spark interference in speakers

    Sounds more like a "ground loop" problem to me....

    First guess will be that it's an amplifier ground wire that's not doing it's job....or starting to come loose.

    Usually noise that "appears" over time is from grounding issues. If it's there from DAY ONE, it could be more equipment-selection related. (bad component)
     
  4. daleearnhardt01

    daleearnhardt01 1/2 ton status

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    Re: Picking up spark interference in speakers

    ttt
     
  5. Greg72

    Greg72 "Might As Well..." Staff Member Super Moderator

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    Re: Picking up spark interference in speakers

    [ QUOTE ]
    ttt

    [/ QUOTE ]


    Meaning what.....???? Have you tried anything we suggested.... give us an update. /forums/images/graemlins/tongue.gif
     
  6. daleearnhardt01

    daleearnhardt01 1/2 ton status

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    Re: Picking up spark interference in speakers

    Well Greg I tried a new ground......didnt help. Then I realized none of this happened when I was playing a CD. Seems as if the antenna is screwed up or something. Any ideas?
     
  7. Greg72

    Greg72 "Might As Well..." Staff Member Super Moderator

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    Re: Picking up spark interference in speakers

    Is it an electric antenna?

    Sounds like maybe IT'S the component with the bad ground... I recall in my distant past sometimes we would swap out bad power antennas (cheapie ones) for better quality ones.

    The fact that you can isolate the problem to the radio and NOT the CD portion is important. That means that it isn't the power amp, or anything downstream of the head unit.

    If it were me, I'd try cleaning the antenna socket that plugs into the radio, and the ground (if any) that comes off the antenna to power the motor. If simply cleaning the connections won't fix it, you could try grounding the antenna to the same spot as the power amps......or as a last resort, replace the antenna completely.


    Good luck.... /forums/images/graemlins/cool.gif
     
  8. daleearnhardt01

    daleearnhardt01 1/2 ton status

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    Re: Picking up spark interference in speakers

    Nope not a power antenna just the regular one on my Jimmy. Should I take it to Circuit City and tell em its the antenna? I took it over there last weekend and they said they dont deal with engine noise but since its just the radio I think its a whole new ballgame. Its under warranty maybe theyll fix it now. Who knows, all I know is that its driving me up the wall /forums/images/graemlins/angryfire.gif Since its just the radio would it be the reciever's ground thats screwed still? Thats what I tried but it didnt work. It still makes all the noise without the RCAs plugged in.
     
  9. Greg72

    Greg72 "Might As Well..." Staff Member Super Moderator

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    Re: Picking up spark interference in speakers

    [ QUOTE ]
    . It still makes all the noise without the RCAs plugged in.

    [/ QUOTE ]


    Hold on a minute here.....without the RCAs from the amp plugged in, it's making noise? Are these "noisy" speakers running off the decks amplifier, or off an external amp?

    If they're off an external amp, then there's something screwy....either with your amp, or with your original description of the troubleshooting steps you took....



    BTW -> I'm still laughing that Circuit City doesn't warranty "engine noise"...... If all the equipment and installation was from them, I'd be ALL over them about that one!!! /forums/images/graemlins/mad.gif
     
  10. daleearnhardt01

    daleearnhardt01 1/2 ton status

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    Re: Picking up spark interference in speakers

    The 4 speakers are powered by the head unit. The only thing powered by the amp is my 2 10's. So that rules out any amp troubles right?

    Circuit City is so gay. I should have just done it myself but oh well.
     
  11. Greg72

    Greg72 "Might As Well..." Staff Member Super Moderator

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    Re: Picking up spark interference in speakers

    If the noise is coming from the 4 speakers, then you're still on the right track.... some sort of antenna/deck grounding issue.

    I suppose you could also try running the deck ground to the same chassis ground as the amp if that's convenient. I'm assuming that the amp ground is connected to a clean metal spot inside the truck, and is NOT running all the way back to the negative terminal of the battery? (Hint: That would be a BAD place to ground it!) /forums/images/graemlins/cool.gif
     
  12. daleearnhardt01

    daleearnhardt01 1/2 ton status

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    Re: Picking up spark interference in speakers

    Yeah the amp is grouned to a place inside the truck
     
  13. daleearnhardt01

    daleearnhardt01 1/2 ton status

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    Well it fixed itself somehow.....or atleast it hasnt done it in a few weeks. /forums/images/graemlins/thumb.gif
     
  14. Greg72

    Greg72 "Might As Well..." Staff Member Super Moderator

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    Lemme guess....has it been raining lately?
     
  15. daleearnhardt01

    daleearnhardt01 1/2 ton status

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    [ QUOTE ]
    Lemme guess....has it been raining lately?

    [/ QUOTE ]

    Kind of, it hasnt been like monsoon rains or anything just your basic rain showers and stuff or I guess you could call it dampness.
     
  16. Greg72

    Greg72 "Might As Well..." Staff Member Super Moderator

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    In my early days of audio, I had a system that started out with NO engine whine and sounded great.....then slowly over time it began to develop more and more noise.

    Surprisingly, when it rained the engine noise went away....my only theory at the time was that I had a bad ground and the water that was getting into that connection was improving the electrical ground somewhat.

    Eventually, I pulled the ground and cleaned the sheetmetal again, and reinstalled it with a coat of paint over the top to seal everything from corrosion. It worked great from then on....

    My guess is that you have an intermittently good/bad ground somewhere. Try cleaning up the metal and connectors and seal them up if you can. /forums/images/graemlins/cool.gif
     

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