Re: Solid-state coil (gate xfrmr question)

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Ed Phillips by way of Terry Fritz <twftesla-at-qwest-dot-net>" <evp-at-pacbell-dot-net>

Tesla list wrote:
> 
> Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<cwillis-at-guilford.edu>
> 
> Hi folks,
> 
> I just started toying with a solid-state coil setup that uses an IRF740
> driven by a 556 timer and a gate driver chip.  The thing is working pretty
> well, giving up to 5" of spark with about 70 watts in.  

	What kind of coil and how do you keep it from arcing over?  I've never
been able to run a GM HEI coil to that spark length, even when it is
suspended in oil.  I've had problems at 4" and over.

Ed