Re: short circuit accross the spark gap

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: robert & june heidlebaugh <rheidlebaugh-at-desertgate-dot-com> 

YES, with a dc coil the supply tends to power arc so a small coil is used to
disconect the supply from the spark gap/capacitor. This requires  only about
3 u Sec of time or a small value coil. The TERRY filter also acts the same
way to disconnect the NST whem the gap fires.
    Robert   H
-- 


 > From: "Tesla list" <tesla-at-pupman-dot-com>
 > Date: Thu, 11 Mar 2004 07:14:51 -0700
 > To: tesla-at-pupman-dot-com
 > Subject: short circuit accross the spark gap
 > Resent-From: tesla-at-pupman-dot-com
 > Resent-Date: Thu, 11 Mar 2004 07:26:32 -0700
 >
 > Original poster: "Daniel Ullfig" <DUllfig-at-sbcglobal-dot-net>
 >
 > Hey everyone,
 >
 > In his first patent on the generation of high frequencies, Tesla used a
 > rotary "circuit controller", kind of like a DC motor collector. In fact, the
 > controller was turned by a DC motor. Anyways, if you study the patent
 > carefully, you see the controller actually disconnects the charging circuit
 > from the capacitor, before connecting it to the primary. But in spark gap
 > systems, the spark gap actually becomes a short circuit accross the supply
 > line when it fires.
 >
 > Has anyone given some thought on disconnecting the supply line from the
 > capacitor somehow before the spark gap fires? how much energy is wasted by
 > this short?
 >
 > Dan Ullfig
 > Harbor City, CA
 >
 >