Alan B. Pearce wrote:

> Well, hand winding is definitely an option, for the quantities you quote.
> Taken to the extreme see if there is an intellectually disabled persons
> workshop near you, and see if they would be interested in piece work.
> The company I did my apprenticeship with did this for winding toroids
> for power supplies for valve transmitter equipment that ran of vehicle
> power supplies. Worked extremely well.

Thanks for the suggestion -- I'll keep it in mind. 

> But another option is to look at small transformers from the likes of
> Coilcraft. For your purpose I suspect something like a gate drive
> transformer will do the trick. Have a look at the Coilcraft S5499-D and
> drive it with a transistor with 50% duty cycle at around 10kHz. We use
> it like this to provide an isolated drive to some FET gates to turn them
> on for a DC drive. (see attached picture).

Same here... But overall, I think the transformers add a lot of unnecessary
overhead here.

Thanks,
Gerhard

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