Michaelpk3
Well Known Member
I recently changed out a 430W with a 650 and there seems to be a very strong alternator noise (much more than before). Same noise on com1 and com2. The ?whine? pitch changes with engine RPM. The noise goes away when I shut off the Alt Switch so this is telling me the alternator is the suspect. I currently have an Aircraft Spruce alt filter connected to the back of the alternator (60A plane power). P leads are grounded on both ends and I have ferrite core on the wire coming off alternator. Anything else to check? Possibly the alternator is going bad?