Bob Nuckolls (AeroElectric Connection) has stated:


"As long as you have a battery on line,
the capacitor serves no demonstrable
purpose."


It's actual intended purpose seems to be a mystery to many owners, but I do not believe that it is there as a noise filter as many seem to think. I tend to generally believe and accept what Bob says, and it seems like Lowell's experience probably tends to confirm his statement. I'm guessing that the capacitor provides some kind of a buffer if the battery is disconnected, preventing unwanted bad things from happening?