The second drawing has a single ground reference.  Multiple grounds off a
single winding is my concern.

On Feb 3, 2017 8:11 PM, "IVP" <joecolquitt@clear.net.nz> wrote:

> Or maybe I have no idea. But it's worth asking, anyway
>>
>
> Well, an element of doubt is no bad thing
>
> Isn't it similar to two separate windings in which the bridges
> connect to a common ground ?
>
> Attached is what I think James described
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