PSU wiring help needed

[Boyan Silyavski]

Hi,
i posted my question on my build thread http://www.mycncuk.com/threads/6457-...9464#post59464, but it seems no body have seen it.

So i would ask here the electronic knowledgeable.

I need some help wiring the toroidal transformer 2x 50VAC to the Power Regulator Board so at the end to have 70VDC

This is the board



I wired coil 1 of the transformer 50VAC to the AC1 and AC2 . Coil 2 50VAC to AC3 and AC4.


At the other side as seen on the picture bellow it says VDC+ VDC+ Ground Ground Ground VDC- VDC-




I wired VDC+ and VDC+ together for the + and VDC- and VDC- together for the -, but i have now 140VDC there instead of 70VDC.

What i am doing wrong? I am doing some obvious mistake. Anybody knows how is the proper way to wire them together for 70VDC output?