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430 Whine in Scud?

Discussion in '360/430' started by MikeMonty, May 2, 2021.

  1. MikeMonty

    MikeMonty Karting
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    May 28, 2004
    65
    Nashville TN
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    Mike
    I am getting an intermittent high pitch whine in my Scud. Any idea on what is causing it?

     
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  3. 24000rpm

    24000rpm F1 Rookie
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  4. MikeMonty

    MikeMonty Karting
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    May 28, 2004
    65
    Nashville TN
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    Mike
    Radio power is off so don't think it is the speaker.
     
  5. vv23

    vv23 Karting

    Jan 8, 2009
    185
    Edmonton, Alberta
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    V V
    Sounds like sticky relay somewhere
     
  6. Scottslaw

    Scottslaw Karting
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    Try a battery reset? (turn off at the frunk for about 5 min). Strange that its intermittent.
     
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  8. luccio

    luccio Rookie
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    At constant RPM it could sound like a dead capacitor in a voltage regulator. Does the frequency varies with the RPM? Otherwise it could be a coil of some kind - in any electric motor, relay, valve...
     
  9. MikeMonty

    MikeMonty Karting
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    May 28, 2004
    65
    Nashville TN
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    Mike
    Frequency does not vary with RPM. Just a constant whine. However, sometimes take it out for a drive and there is no noise. It is annoying so trying to figure it out. Will try the battery reset.
     
  10. luccio

    luccio Rookie
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    Did you locate the noise close to the instrument cluster where it is filmed?
     
  11. 24000rpm

    24000rpm F1 Rookie
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    even radio is off , speaker still could whine
     
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  13. luccio

    luccio Rookie
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    Feb 10, 2021
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    Luccio
    If the whining comes from the speakers then it's likely a ground issue with the amplifier. However (in my little experience with this) this results in a whining pitch that follows the RPM... so I would exclude this.
     

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