Big thanks to all who replied, I will swap them round using one or the other suggested methods.
Can anyone explain how this 1:1 transformer gets the correct input phase on pin 1 & 4.
And an inverted phase if the input on pin 1 is connected to pin 6.
I would like to learn how they wind these to get 2 different phases. Is it simply that the primary is wound in 1 direction
and secondary is wound in the other direction ?.
Also how would someone find out the input start pin 1 - and pin 4 , if a transformer had no dot or pin numbers on them ?.
Thank you.