ZVS driver not working effecitently
I have recently made a ZVS flyback driver. I got it working and the sparks are relatively impressive compared to other drivers I have made, but the arcs I'm getting seem a lot lower current and colder than pretty much every video I have seen of the ZVS driver. I used the Mazzilli ZVS schematic, and everything meets the specs in the schematic accept for the inductor which I made from a torroid i found in a PSU by winding about 15 turns of 18 gauge wire around it. the torroid has about a half inch outer diameter. I have a 5 5 primary on the transformer made from 18 awg wire. As it stands The driver is able to produce 20 to 25 kv with a thirty volt input, but the sparks are for the most part purple (not the flame like orange I have seem people get). As I didn't have any lead acid batteries around I just used six lantern batteries in series. I suspect the problem is either the power supply can't provide enough current, but I have measured and it seems to draw about 4 amps when arcing, and from what I understand it should draw about 10 amps and try to do that regardless of the power supply. I also think it could be the inductor is the problem, since it is what provides the constant current to the primary. If anyone knows what the problem could be and how to fix it, I would greatly appreciate your advice?