The primary electrolytic, 450V, and the X caps, 275VAC, survived, I changed the electrolytic however. The MOVs are 510V, clamp at 840V so they might have just started to get warm maybe. Linkswitch max drain voltage is 750V. I'm driving the supply from a 1kW inverter, non isolated, it's more convenient than a variac. The inverter keeps alarming because of the high inrush current into the X caps and my power supply is just a tiny part of a bigger system hence the big X caps.