Original poster: "Steve Mach by way of Terry Fritz <twftesla-at-qwest-dot-net>" <gossamer-at-cox-dot-net> Hello All,I discovered at work today (slow day) some really clean NST's Also discovered that sec's are center tapped ! I never knew this. Has anyone un-potted and lifted the ct from the case? Will winding insulation hold up if run under oil? JOULES RULES SM