I designed this source, 6V 12A, I have tried many ways to make it work, but it has not been possible, I have assembled the circuit, like the schematic.
I mounted the transformer several times, but no.
in some occasions give me voltage, but delivers nothing current, 4ohm load, the voltage drops completely.
check the bias voltage and is always 0, not how to measure the transformer is really well built.
thank you very much for your help