Hi everyone. I want to replace the Grid Caps in my Heathkit SB-200. In the drawing these caps are labeled C14 and C15. The existing caps are Silver Mica 200uuf with voltage unknown; I am not able to determine the voltage from the markings on the caps. Also, the voltage is not listed in the parts list. Does anyone know what the voltage rating is on these two caps? And if the voltage of these caps is unknown does anyone know what the maximum voltage is in the grid circuit.