The Ware for June 2015 is, in fact, an HV supply for driving an X-ray tube, and during normal operation it’s immersed in oil. I’ll give the prize to Matt Sieker, for being the first to correctly guess the ware.
Interesting that so many people found it to be “obviously” an HV supply for an X-ray tube — first time I had ever seen one! I found the construction details of the high voltage transformers to be interesting. Certainly a domain in which I have little direct design expertise.
I’m curious about the transformer construction too – what motivates the large square (presumably) ferrite core that extends well outside the windings?
I suppose ferrite is not a good insulator. And it needs to be kept away from the outside of the coil, which is the part with the highest voltage.
My 35 year old niece rates this job very engaging =)