Three transistors and an Op Amp, and yes, there is a gap in the
transformer between the core sections. About 1 mil.

"JackShephard" wrote in
message ...
Three transistors and an Op Amp, and yes, there is a gap in the
transformer between the core sections. About 1 mil.

So, it's a bug zapper?

Bob

On Wed, 30 May 2007 19:40:51 -0700, "Bob"
wrote:


"JackShephard" wrote in
message ...
Three transistors and an Op Amp, and yes, there is a gap in the
transformer between the core sections. About 1 mil.

So, it's a bug zapper?

No. Those are unregulated AC, IIRC. Nice try though.

If you'll note, this has a feedback tap on the first multiplier
segment, so it loses regulation accuracy as the loading goes up. A
couple feed forward caps across the HV feedback resistors (which may well
be on the bottom) can compensate for this issue though. The design
likely called for low cost, or we would have used a tap directly on the
output, and a higher voltage resistor set. Did you note where all it
takes to operate it is is 3 Volts? IIRC, it had about 67% efficiency,
which is pretty good for such items. Of course, the operation changes a
bit with a varnish encapsulated transformer, or potted in RTV
transformer, but the fluid comes close, so it was pretty well tuned.
It probably ran at around 60kHz.