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Fwd: AC voltage at aircraft bus at approx. 1000rpm

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az_gila

Joined: 17 Jun 2006
Posts: 99
Location: Tucson, AZ

Posted: Thu Feb 04, 2010 8:50 pm Post subject: Fwd: AC voltage at aircraft bus at approx. 1000rpm

Gary,



 At 5 mS/div on the scope... could you be seeing some 60 Hz pickup? - which would be just over 3 divisions.



 Is the noise frequency proportional to RPM?



 How long was the ground lead to your probe?



 gil A



 

 At 08:55 PM 2/4/2010, teamgrumman(at)aol.com wrote:

 [quote]The whole point is not to patch together something that should work without a "FIX."  It says right on the alternator and the associated paperwork that no noise filter is required.   



 It's kind of like wearing a glove when you buy a pen that leaks.



 



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