Thanks Ron,
I’m in South Australia, so couldn’t be much further away.
I don’t have a circuit either, rarely have the luxury. Have to draw out my own if I need it badly enough, so it’s a lot of work.
In this case, will have to chisel off more of the potting mix to be able to see more.!!!
Thanks for your insight regarding turns ratios, inductance and wire size … that helps a lot.
I don’t have anything to lose so I may have a go at pulling one apart and see what I can learn.
The board is a Westfalia ACR2 used in an ACR3 case. They have been around for a while but are still used all over the world, so I think the isolation part has been designed ok. What wire I can see is so fine and the device is so tiny, there’s no room for any fancy insulation over and above the normal enameled wire.
Any way, I guess I was hoping someone would say … I’ve seen transformers like that used in an “xyzabc” … and I could look up the specs, choose one, fit it, and live happily ever after …
Thanks again for your help ... I'll let you know how I get on.
Wes