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Re: ISSTC questions

Original poster: "Eastern Voltage Research Corporation" <dhmccauley-at-easternvoltageresearch-dot-com> 

It sounds like you may have just not found the optimal tuning point for your
You need to tune the ISSTC just as you would a spark gap coil.

Also, what voltage are you running your mains at (120VAC?  240VAC ? ? ?)
For 120VAC, 36" to 48" seems about right to me.


 > Hi all, I have a question for the New Age SSTC Folk (NASSTCF ;-) )
 > my "Interrupted" "wantabe" DRSSTC: Presently I seem to be getting stuck
 > only 15-20" sparks using my Steve Ward style driver and 40 Amp IGBT
 > Half-Bridge. I am now trying my 6" secondary with the same spark lengths
 > my 4" ??? I have my driver running pretty stable using a current trany for
 > self-res, and have played much with pulse rate and duration. Yes I have a
 > nice range of both...
 > But I wonder if I need a lower pri L, as I have 24.3uH (8 turns #10 on a
 > ~10.5" form with bottom turn equal to bottom of 6" secondary)?
 > So what have others found to be the most Synergistic size primary with
 > things? Keep it low and increase primary C? Do I need tighter coupling?
 > Any suggestions would be appreciated.
 > Regards,
 > David Trimmell