On Wed, 13 Jun 2012 23:25:25 -0800, Robert Baer
wrote:

John Larkin wrote:
On Sun, 10 Jun 2012 11:25:54 -0500, "Tim Williams"
wrote:

Looks quite good, actually. Like Fred says, integrate, then you will have
it right.

Try amorphous or nanocrystalline cores, too. They switch quite quickly.
I've built a toy circuit that generated enough harmonics to cause itself to
ring a bit; the risetime was under 1us.

Physics guys use the stuff to generate fast (1us) current pulses for
particle accelerators and junk. They drive them with 3kA+ IGBTs, which
don't even switch as fast (~1us). Lots of power density.

Tim

Nonlinear transmission lines are cool. You can make them with
saturating inductors, ceramic capacitors, or varicap diodes, even
ordinary power diodes. You can get the risetime to go down as a step
propagates down the line.


Check; i have heard stories about sub-nanosecond risetimes.

Robert, please measure again with primary current on the x axis and the
integral of secondary voltage on the y axis. I know what i expect to see
and why. BTW you may just measure secondary voltage and numerically
integrate it later, just so that it is easier to make the measurements.

?-)