Original poster: "by way of Terry Fritz <teslalist@qwest.net>" <dhmccauley@spacecatlighting.com> Exactly what it says. A filament transformer with a very large amount of HV isolation. Dan > http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=3029990603&category=4675 > > hello all > do you fellas know what this is? > > thanks > read you later > Josh > >