Hi Steven, I got that RMS/Peak-to-peak info from a guy at a neon sign company. He had to go and look it up for me. So I'm not completely satisfied myself. Your info sounds more like what I remember. I've just never dealt with transformers at this level before. I may check with the manufacturer out of curiousity. Thanks, Mark Napier (lisanap-at-cats.ucsc.edu)