DIY HV transformer

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Christoph Bohr" <cb@xxxxxxxxxxxxxxx>

Hello everyone.

As you may have noticed during the last few days, I had some trouble
with my 6-mot-stack, which finally lead to a failure mode that makes
diagnosis very difficult, so I wanted to try something else: Wind my own
transformer:
first pictures of the winding process can be seen here:
http://www.luebke-lands.de/tesla19.html
along with some basic specs.

The transformer is intended to be run unter oil, but another problem arises:

The core material I am winding this transformer on, is the core of my former
ballast coil, which means I no longer have one.
Now, can I incooperate some shunts or airgap to limit the current so that I
don't
have to build another ballast coil?
The core is basicaly rectangular, with each of the coils on one leg left and
right...
Maybe someone has an idea here. Maybe even with shunts, that can be moved
by means of some mechanism while the transformer is still under oil....

I'm thankfull for any suggestions.

best regards

Christoph