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Re: handy controller for small coils...

Original poster: "Peter Terren" <pterren@xxxxxxxxxxxx>

For a solid state variac substitute, I have used an IGBT out of an inverter microwave run by a TL494 at 2kHz. The tricky part is that it is "inside" a bridge rectifier so that it controls AC. This is inserted between the mains and the NST. There is also a snubber of 0.1uF and 400 ohm that gets pretty hot. I haven't tuned this for long term runs yet as a lot of power is still being dumped into a 230V MOV across the IGBT. It needs more development though but does work.
Peter (Tesla downunder)

Original poster: tesla popp <teslas_lab@xxxxxxxxx>
I have several small spark gap coils sitting around.
None exceed 600 watts so...   I, with your help, would
like to design a controller for these small coils. .....
Thanks in advance for your help
Coiler Forever: Jeremiah Popp