Hi coilers! I'm about building a CW-VTTC, driven by a dc supply, and I've acquired some HV diodes therefore. They are black, can be stacked, have got the shape of a spherical cap, about 2" in dia and are labelled 'CSx or CS& CDB 7.5 Made in USA'. Other diodes are labelled 'HVCA HDB 7.5'. I assume(!) that these diodes will withstand 7.5 kVrms but would like to download the correct data of course. Could anyone please help me? Regards Herwig