My 0.34" gap is a single gap. Pictures and details on my web site at: http://people.ne.mediaone.net/lau/tesla/tesla.htm <http://people.ne.mediaone.net/lau/tesla/tesla.htm> , see "My single static spark gap". Regards, Gary Lau Waltham, MA USA >Original Poster: Parpp807@aol.com > ><snip> >When you say that you use a gap of 0.30, is that a single gap, one giant >leap, or are you using a multiple gap? > >Thanks again, > >Cheers, >Ralph Zekelman