Hi Terry,
Thanks for the reply. I had read the article a couple of times but failed to note the significance of that sentence! I just assumed that the driven winding would be the primary. Good job I noticed the orientation of the coil when studying the PCB layout and asked the question!
I wonder how many others have fitted it the wrong way round? I imagine it would probably work but with lower output?
I'd best go and remove mine and fit it the correct way round....
Many thanks
Nick