I have a box of red, 2500pF, 15kV, 1" diameter capacitors.they are of the type D70X5R25M15KV and the T.C. is X5R. well that doesn't mean a whole lot to me, i am not familiar with them, but maybe someone on the list is. would the voltage rating on them be a DC rating? if they are DC and i wanted to employ them in my coil would parallel strings of 3 in series be suitable to take care of and AC supply voltage of 9kV? thanks kevin wahila