Original poster: "chris swinson" <exxos-at-cps-games.co.uk> Hi all SSTC ppl! am I right in thinking the DC blocking caps are only there so the coil will only draw power at Fres ? I wonder what would happen if I took them out and drove the coils direct. I imagine as long as the frequency is near Fres then it wont draw any more power and short out the outstage, comments ? Cheers, Chris