11-02-2012, 09:46 PM
I restored an Atwater Kent model 60 for a friend. I measured the value of the capacitance of the filter capacitors, and they measured almost exactly the values stated on the schematic. They were obviously not electrolytic capacitors, as if they were, they would be shorted after many decades of not being used. I left them in place, and they worked fine. Perhaps they were impregnated in oil.