Re: capacitors in series - pitfalls?
@Brymac, I didn't see a reply to your question relating to the dishwasher caps,
These are plastic film caps and will be great in power supplies, they will have an AC voltage rating so will be good on DC to at least peak value (ACx1.414) and probably good to nearly pk-pk value.
The leakiest 'lytic in series will have a slight tendency to further form and may even reduce its capacitance marginally, both actions will have a self balancing effect but the bleed resistors shoud still be included and have a value that will swamp the leakage current.
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