[G6Tanuki]

I need to build a quick-and-dirty 12V@3A power supply. I have two RS transformers, one is a 504-587, the other a 504-262.

They both each have two 15V 10VA secondaries. But one has a single 240V primary, the other has two 115V primaries.

In times-past I would have followed the Nike "Just do it" approach and wired the primaries/secondaries in parallel. A

And it would probably have worked well-beyond any sort of warranty I'd have offered a customer.

But... as an alternative, I have some rather-well-built Mil-spec heatsinked-bridge-rectifiers [16A@500V] and so my mind has been wandering to the idea of putting the secondaries of the two transformers into separate bridges before combining them into a few tens-of-thousand-microfarads of smoothers.

What would you do?

I want this to be reliable - delivering 12.5V@3A continuously for years without worry.