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Original Message
RE: update
Posted by RayP on February 8, 2017 at 17:03:11:
I think if you look at the back of the pcb that you will see that the diodes on either side are connected to each other at the edge of the pcb. they are also connected to the large green caps. It is just a simple diode bridge.
Presumably you remembered to observe the cap's polarity.
It's interesting that you got to such a low voltage. Perhaps next time you could start with the 550 uf cap attached and then remove the turns. Or as you suggest you could try a lower value cap.
ray