@Rod Stewart posted:Bob; my curiosity is burning; have you tried swapping out one of the 1000 uF caps for a 470 in either of the failed boards??
Rod
Rod, yes - my second build was with the 1000uF cap and when it did not work, I de-soldered it, removed and replaced it with a 400uF cap. The operation was then perfect.
@gunrunnerjohn posted:They looked to be installed in the correct orientation, not much else you can do to those caps to cook them in that circuit. I looked at the picture again, and the only thing that comes to mind is you connected the AC to the wrong connector. Noting that you used the same style connectors for both AC and DC, if you connected AC to the DC side, you would get some very funny readings!
FWIW, I always use different connectors for power and signals on anything I build, that way it's not possible to connect the power to the wrong place.
John, good tip on using different connectors. To avoid that blunder of mixing up the AC input with the DC output, I checked and re-checked with the markings on the spare PCB, as seen in the first photo.
Both you guys are awesome in the interest taken in my problem. That's what makes this Forum so valuable!
Bob
