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phatnoise /changer whine gone now

Discussion in 'In-Car Entertainment' started by dunk, Jun 5, 2004.

  1. dunk

    dunk Member

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    many poeple get an revs related whine after fitting a cd changer or phatbox. after i fitted my phatnoise i had 2 noises:

    1) high pitched sound like morse code going on in the background
    2) engine speed related quiet whine that many people had suffered.

    to get rid of 1) i wrapped the phatbox in a thin layer of plastic sheet and mounted it in the changer holder using nylon screws - this removed the 2nd earth path via the case and worked a treat

    to get rid of 2) i tried all sorts including putting multiple ferrites on the changer cable - none of which helped until i also put one right at the end of the cable near the back of the radio - and hurrah, the engine whine has gone completely.

    i was considering running separate phono cables to the phatbox for the audio feed to the head but dont need to now at all.
     
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  3. MarkyB

    MarkyB Member

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    LOL. My Phatbox is stuck to the top of my BOSE Sub with a couple of 3M Sticky-Pads that Halfords will sell you to stick your Number Plate to the bumper of your car. No nasty ground loops for me there! /ubbthreads/images/graemlins/tongue.gif

    Interesting tip on the ferrite core at the HU end of the CD Changer Cable. If mine starts causing trouble I'll give that a go ASAP.

    The annoying problem that I have is a loud whine/burbling on MW Radio (permanently tuned to Radio 5 Live!) which comes and goes, it's probably caused by a bad earth somewhere else /ubbthreads/images/graemlins/confused.gif

    Mark.
     
  4. mattyboy199

    mattyboy199 Active Member

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  5. dunk

    dunk Member

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    one of the clip-on ones with a big enough central gap to go around the cd changer cable
     
  6. mattyboy199

    mattyboy199 Active Member

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    does anyone know the diameter of the CD changer cable ?
     

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