I'll restate, I have ZERO knowledge of automotive voltage regulators. It is only what I have read in the last couple years while begining to work on my car.
My original post about filtering was meant to see if the experaince mechanics here have ever modified the regulator to smooth out the "stepping" output of the mechanical design. Given this design has been used on millions of cars, I would have hoped there would have been something already tried and proven.
I plan to study this design and see if I can remember how to design a filter, besides my appearant loss of knowledge about circuits, the other challange will be not knowing any thing about the output of the altenator. If this was a work problem, I would ask for an oscilloscope trace
the reason for requesting the actual part number is to verify that the currently manufactored regulators are the switching relay design and not the newer transitor controlled.
By chance would the pully ratio be known so I would have some ideal of what the primary output frequency would be.