I did some crude adjustments gave it 1.5 volts and away it went.
Not sure what voltage its intended to run on but as the Primary is just under 1 Ohm I doubt its much more than that.
I manage to draw a very small spark off the secondary and light a small neon
So I would not put this in the killer class
I still have not had a chance to glue up the case yet.
The original Battery type is a bit of a mystery, open to suggestions.
Its too small a space for something like an 800 (3 Volt lantern battery).
The maximum size 3.5" by 1.75" by 1.5"
The contacts are on the side
I can make up a little carrier for a D cell just wondered what the original was.
Cheers
Mike T