Tim Williams wrote:
"Don Foreman" wrote in message
...

Ya got me there, Tiim. I've never designed one-shot transformers.


How about superconducting transformers? I've got to imagine it's been done
by now, unless iron loses its ferromagnetic properties at low temperatures
(reverse-curie temp? heh).
In that case, the wire can be microns in diameter, thousands of turns can be
applied in a very small area, while still maintaining a high current density
due to the material.

Umm, no. There's a surprisingly low critical
current density where the superconductivity
disappears.