Re: 12 inch spark, 1 inch flame.
> Even with this current though the output transformer gets very hot.
> I'm planning to put 3 E cores side by side, spliting a bobbin in two
> using a bit of wood to keep the halves aligned at the correct
> distance till I wind it. But I've got myself confused, for the same
> inductance etc do I only need 1/3 the turns or 1/1.732 the number
> of turns (root 3)?
I think you'd have to put the cores together and measure Al/ue values.
I suspect it's closer to the root 3 value.