@gunrunnerjohn posted:.... since I don't know where it'll be used.
As I understand it, this is for conventional block-control. I see the 22uH DCS signaling inductor installed. That said, if this might be used downstream in a DCS command-control environment I'd swap in the 35V cap (v. the 25V cap in the picture) now while it's on the bench. I realize you show a 35V cap in your schematic.
Even with the bridge drop, tolerances in 18V AC bricks... or transformers that put out >20V AC ... push the 25V DC rating (i.e., 25 VDCpk / 1.414 = 17.7 VACpk). And even if in conventional, if using a chopped-sine controller if memory serves me there were some MTH Z-controllers that used 21V AC bricks; so you could see the excessive peak voltages even operating at lower average conventional voltages.
