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Thread: Getting the hum out

  1. #1
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    Apr 2002
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    Lafayette, LA
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    Getting the hum out

    I installed my cables in my car the other day but now I have a very annoying hum in my stereo when I used my tape adapter.

    Please note. I'm not going for the fanciest setup here. I'm driving an 87 Mercury Lynx and I'm very low on cash. Now... To get rid of that humm... What should I do?

    I've already attached a ground from the inveter ground to my car. Is there anywhere else I should ground?

    Also, I believe my audio line runs in the same bundle as my power line. Could this be causing disturbance? Is it just the AC that would cause the disturbance or is it the DC power cable too (+5V for the LCD)?

    I'm figuring I'll probably have to rewire some stuff but I'm trying to figure out what would go best where.

  2. #2
    FLAC
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    May 2002
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    Sef'Kylar
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    Ground EVERYTHING

    Genearlly not a good idea to bundle power with audio.. It's a good idea to keep them as seperate as you can.

    Use sheilded cables.. cuts down on interference..

    If all else fails head over to radio shack or similar place and get your self a ground loop filter (it takes the hum out ) and connect it directly before the adapter that is putting sound to your car.. in this case your tape adapter
    aka Kumaneko
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  3. #3
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    Ok... but everything... What exactly is everything? Ground the PC case? What else?

  4. #4
    Retired Admin Aaron Cake's Avatar
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    Well, everything is everything. PC case, power supply case, motherboard, sound card, etc...Also, try a ground loop isolator. Available at Rat Shack or other electronics store. If worse comes to worse, get a DC/DC converter and all your hum problemd will disappear forever.
    Player: Pentium 166MMX, Amptron 598LMR MB w/onboard Sound, Video, LAN, 10.2 Gig Fujitsu Laptop HD, Arise 865 DC-DC Converter, Lexan Case, Custom Software w/Voice Interface, MS Access Based Playlists
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  5. #5
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    Lafayette, LA
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    I moved the audio to the other side of the car and resautered the wire on to the ground of the inverter and grounded that better. It took care of most of the hum. I would love to have a DC to DC PS but I just don't have the money for one right now. I had $50 in gift certificates to best buy which covered the cost of the inverter.

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