Wait! than again, it might make a good audio generator.. that is, if you can
stand the heat.

Seriously, Marquis, I think what Paul is saying is that the material is not
(probably is not) anything like what you would use in a magnetic device.
The permeability and flux density and complex parameters like that mean
everything.  The difference between a filament transformer and a 100KHz
switching transfromer (flyback mode) are extremely different.  For a self
oscillating 'converter' transformer, there are short but very high current
spikes at the end of each on cycle, by design, in the saturating core.  The
core materials are frequently refered to as 'square 80' or 'Square 40' due
to the nearly rectangular shape of the BH curves.  If you do not use these
materials, the unit will be inefficient, and generate COPIOUS amounts of
heat.

In practice, I would specify the general parameters of your transformer,
like VIN, VOUT, IPEAK, Lpri, and ratio.  Let the transformer manufacturer
worry about pri turns, foil or litz or wire, and core material.  Most
non-transformer manufacturers are woefully unprepared to play with these
things.  How would you gap a toroid at 15 mils?

Seriously.  Choose a manufacturer, and schedule your shipments so that they
can plan them ahead.  If your volumes are low, your price will be high.
Squealing will not change that.  If your volumes are high, they will listen
a lot harder when you say jump.

Good luck.
Chris Eddy
Pioneer Microsystems, Inc.


>marquis De wrote:
>
>> im almost tempted to get a long strip of spring steel, and do it
>> myself!
>
>  I wouldn't do that if I were you.  Spring steel has *nothing* to do
>with transformers.
>--
>  Cheers,
>        Paul B.