Thomas, please check all three DOTS are from the same end of the transformer. Most important that same winding start and end is correct. At 24-02-2014, you wrote: >Thanks Mark. That's how I have been doing it. I was not sure because T1 & T2 >do not have those dots. Is it because phasing is not important on them? > >I have just rewound a new T3 using a new roll of #32 AWG wire on a new >FT37-43. I get the exact same problem. So here is a picture of what I am doing >with some labels as to where the wires go. I hope I am doing something very >stupid and someone will be able to point it out: