Neil,

> In this case, the load of the 12V output is higher than the
> load on the 5V output.... are you suggesting that this is bad?

In this case, yes!

> The 5V o/p is still giving me 5V,

Expected, that's what your feedback loop is regulating.

Try significantly increasing the main output load (best) or reduce the
secondary output load to a trickle (say, 1/10 main power) and you should
see values closer to what you expect.  What you have here is similar to
what Dixon is describing in slup105.pdf with the core gapped in both the
center and outer legs (unavoidable with your core).

Best regards,

Dave

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