Quote Originally Posted by Glen B
Here is a basic schematic showing a single isolation transformer. Across the primary is an optional varistor for surge protection (Digi-Key part # P7324-ND / Panasonic part # ERZ-V20R241) and 0.47uf caps across the primary and secondary. I use 600V rated Auricaps. X rated caps are normally used in applications across the AC mains. Ther has been dbate about the use of Auricaps. The manufacturer, Audience lists AC line use in their application notes. I have been using them for the past 5 years without incident.
Thanks a lot, Glen.

Sorry 'bout my ignorance, but I'm curious. In general, are there component designs that don't tolerate balance power input?

Regarding the schematic ...
  • Are the 60V output taps opposite phase?
  • Are the caps both across these 60 taps and the input 120V/0V leads the 0.47 uF caps you refer to.