The reason I asked, is that using this board and a CT 18-0-18 winding with UF4007 caused two of the diodes to short. I haven't repeated the process to see which two and since then I am using four as your image shows which works fine. Just wondering if two bridges should have sorted or just the first cycle inrush might have been the culprit.With a CT transformer you can get plus and minus voltages with just one bridge as shown below:
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