Is there any possible way of determining the voltage capability of a capacitor when there is no voltage marking. I have 2 capacitors that are about as round as a quarter and about 3 inches long and they came from a strobe light circuit and the sticker on them indicate that 375 volts were tested on them and passed but that's it , but no definitive voltage amount it is rated for.
so with these old sets that have 450 volt caps, do they really reach 450 volts or is this just the 20-30% built in, AKA , overkill like they did back then.