Original poster: "Dr.Resonance by way of Terry Fritz <teslalist-at-qwest-dot-net>" <resonance-at-jvlnet-dot-com> Yes, they work good for small coil design. With caps of .02 MFD or less the peak current is usually around 300 amps peak. With one of our coils we measured 1975 amps peak running a .05 MFD cap and a pole xmfr as the driver. Dr. Resonance