Thanks, I found them after I posted the reply.
Interesting,
I wonder what would happen if you reversed the operation of coils?
pulse the secondary and see what you get on the primary.... Just a
thought.
I would be interested in trying to create a LC tank
with the primary too and use a spark gap to feed it and see what the
secondary see's. Just some interesting thoughts.
I will be
giving this design a try. and Agentgates is correct with the open TPU
design (first one) on the spool, it does look like his except he uses
the secondary to wind over. I would like to try a simple 555 timer with
a step up transformer to boost the input closer to 1KV or so at low
mA's.
Loads to try.