Original poster: "Terry Fritz" <twftesla-at-qwest-dot-net> Hi All, I am told DigiKey is out of stock on the capacitors for my protection circuit: http://hot-streamer-dot-com/TeslaCoils/Misc/NSTFilt.jpg The value is not critical at all, so feel free to substitute the 2.7 or 3.9 nF caps: P10500-ND P10502-ND Cheers, Terry