David,

For home hobby purposes, I've gotten the core halves and bobbins from
surplus/eBay sources.

For professional work, I have been able to just tell companies (like Wurth
Electronics/Midcom in my particular case) what core material, core size,
and bobbin size (all from standard parts), number of turns and wire
size, and they made samples. I assume that they would have sent me the
piece parts, too, if I had asked.

Sean


On Thu, Jun 8, 2017 at 3:49 PM, Van Horn, David <
david.vanhorn@backcountryaccess.com> wrote:

> Have things changed?
> The last time I tried to do a flyback that needed special magnetics, I ha=
d
> to go through major hoops to get the bobbins, core halves and clamps.
> That in hand it was not bad at all.
>
> Mostly when I'm doing SMPS lately, they are boost or buck, and off the
> shelf magnetics work well enough.
>
>
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