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Hi William, Gary made two types of single-gap spark gaps. The ealier "Sucker Gap" used lower pressure (suction from the vacuum cleaner motor), while the newer "Vortex Gap" (further down on his web page) uses positive pressure from the output of the vacuum cleaner blower. Both performed better than the older RQ type gap. It turns out that Gary had an NST that could deliver an abnormally high amount of current because of the number of shunts that had been removed. This may have contributed to his observation of higher current. In any event, I'd recommend using higher pressure (per the Vortex Gap), since it does have better quenching ability and lower overall gap losses than the Sucker Gap. Good luck, -- Bert --
: Hi again Bert!
: I visited Gary Lau's Site & there he says that his single gap resulted
: in a drastic performance increase of 42" to 51". He replaced his
: RQ gap. In his single gap design, he also says that it pulls more current.
: How is this possible? Should I configure my single gap so that the air
: blows out of the pipes or should air be sucked in the pipes (as in G.Lau's
: site)? I presume that if air is sucked in, then there will be a lower conc.
: of air which will have a lower breakdown voltage. Won't this make the tank
: capacitor discharge more often and that too before it is fully charged?
: Thanks for your advice!
: William
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