As you are discovering, "cheap" and "1500V" are kind of mutually exclusive in that capacitance range. The easily available "orange drops" only go up to .1uF at 1600V. Are the originals oil filled cans of some kind?
Perhaps HV caps scavenged from discarded microwave ovens might be usable? Probably a bit larger than 0.5uF, though...
Last edited by N2IXK; 05-17-2013 at 10:02 AM.
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