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can you eliminate audio whine?

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MacGuru 
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Member spacespace
Joined: August 19, 2004
Posted: July 07, 2010 at 11:06 PM / IP Logged  
While doing more research on how to resolve this, I came across a couple of responses from MINI owners that stated to put a capacitor on the alternator. What does this mean? Has anyone done this? If so, details please...
MacGuru 
Member - Posts: 11
Member spacespace
Joined: August 19, 2004
Posted: July 08, 2010 at 12:12 PM / IP Logged  
Update:
The whine only appears after the amp is turned on. The whine is now been minimized significantly, but is still present. The previous isolation was resolved by disconnecting the battery and allowing it to sit for an hour.
Another suggestion was to use a capacitor. Any idea what farad rating? Polarized or not? Sorry for all the questions, but I'm new to this.
the12volt 
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Joined: March 07, 2002
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Posted: July 08, 2010 at 1:00 PM / IP Logged  

Try a 500 microfarad polarized capacitor on the alternator. I've used them with great success many times in the past to eliminate alternator whine. From what you've described, it will likely work for you.

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MacGuru 
Member - Posts: 11
Member spacespace
Joined: August 19, 2004
Posted: July 08, 2010 at 4:35 PM / IP Logged  
the12volt wrote:

Try a 500 microfarad polarized capacitor on the alternator. I've used them with great success many times in the past to eliminate alternator whine. From what you've described, it will likely work for you.
Thanks. They are installing one tomorrow. I will let you know how it goes.
the12volt 
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Posted: July 08, 2010 at 5:00 PM / IP Logged  
You're welcome. Koo :)
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i am an idiot 
Platinum - Posts: 13,670
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Posted: July 08, 2010 at 10:38 PM / IP Logged  
the12volt wrote:

Try a 500 microfarad polarized capacitor on the alternator. I've used them with great success many times in the past to eliminate alternator whine. From what you've described, it will likely work for you.

500 mic is tiny as far as killing ripple from an alternator, were you meaning to say 5000?  Radio Shack sells a 4700 mic cap for less than 5 dollars.  I would try one or two of those.

jmelton86 
Gold - Posts: 1,228
Gold spacespace
Joined: February 07, 2007
Location: South Carolina, United States
Posted: July 09, 2010 at 6:50 AM / IP Logged  

Why is the alternator doing this, for future reference?

I love MINIs, BTW. I LOVE them.

2013 Kia Rio -90a alternator
DDX470HD GTO14001 GTO1014D (x3)
Big3 in 1/0G
1/0G to GTO14001
the12volt 
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Joined: March 07, 2002
Location: Louisiana, United States
Posted: July 09, 2010 at 7:42 AM / IP Logged  
i am an idiot wrote:
the12volt wrote:

Try a 500 microfarad polarized capacitor on the alternator. I've used them with great success many times in the past to eliminate alternator whine. From what you've described, it will likely work for you.

500 mic is tiny as far as killing ripple from an alternator, were you meaning to say 5000?  Radio Shack sells a 4700 mic cap for less than 5 dollars.  I would try one or two of those.
Thanks for the heads up. Actually, I meant to say a half farad.
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the12volt 
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Joined: March 07, 2002
Location: Louisiana, United States
Posted: July 09, 2010 at 9:02 AM / IP Logged  

Errr... too early for me this morning. A 50,000 microfarad capacitor is what you want.  

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i am an idiot 
Platinum - Posts: 13,670
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Posted: July 09, 2010 at 9:38 AM / IP Logged  
500.000
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