> > Original Poster: NickandSim-at-aol-dot-com > > To All, > I have just built my first glass plate cap. I have been told that > they are fine running in air. Is this true or should I oil bath it? > > Thanks in advance > Nick Field NO! The high voltage will puncture in no time. Don't waste your time building to have it ruined. Mineral oil or Shell Diala Transformer oil is the way to go. Bob Volk