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Alternator noise

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a.s.elliott(at)cox.net
Guest

Posted: Mon Nov 24, 2008 3:15 pm Post subject: Alternator noise

I am getting a lot of what is clearly alternator or voltage regulator noise  on my radio. (No noise on battery, increasing noise in volume and frequency as  RPM increases.  Radio is a Terra 760D fed from the main bus.

  

 I have a small permanent magnet alternator (18 amp John Deere) feeding a  motorcycle voltage regulator (Crane Fireball), connected to the main bus using  the B&C relay/overvoltage protection kit which already includes a big filter  capacitor.

  

 One strange thing I have noticed is that when I turn on the battery, the  alternator fail light comes on, but when I switch on the alternator relay (even  with the engine not running), the light goes out.  Perhaps I wired it  incorrectly?  Charging seems to work fine.

  

 Anyone had a similar problem and found a fix?

  

 Thanks,

 Andy Elliott, Mesa, AZ

N601GE,601XL/TD,Corvair

   [quote][b]

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nuckolls.bob(at)cox.net
Guest

Posted: Tue Nov 25, 2008 10:58 am Post subject: Alternator noise

At 05:13 PM 11/24/2008, you wrote:

 	  Quote: 	
		  I am getting a lot of what is clearly alternator or voltage 

regulator noise on my radio. (No noise on battery, increasing noise 

in volume and frequency as RPM increases.  Radio is a Terra 760D fed 

from the main bus.



I have a small permanent magnet alternator (18 amp John Deere) 

feeding a motorcycle voltage regulator (Crane Fireball), connected 

to the main bus using the B&C relay/overvoltage protection kit which 

already includes a big filter capacitor.



One strange thing I have noticed is that when I turn on the battery, 

the alternator fail light comes on, but when I switch on the 

alternator relay (even with the engine not running), the light goes 

out.  Perhaps I wired it incorrectly?  Charging seems to work fine.



Anyone had a similar problem and found a fix?


	


    It would be helpful to see your power distribution diagram.

    Did you use a z-figure? Can you describe your ground system

    to us too?

        Bob . . .



        ----------------------------------------)

        ( . . .  a long habit of not thinking   )

        ( a thing wrong, gives it a superficial )

        ( appearance of being right . . .       )

        (                                       )

        (                  -Thomas Paine 1776-  )

        ----------------------------------------

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