Re: Basic TS curcuit conflict

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

Original poster: "Gregory Hunter by way of Terry Fritz <twftesla-at-uswest-dot-net>" <ghunter31014-at-yahoo-dot-com>

The two hookup schemes are essentially identical.  The
only reason to choose one over the other is that many
coilers prefer to have both transformer leeds going to
the spark gap, so it can also act as a safety gap. 
Why your coil's behavior would change so much just
switching from one setup to the other is a mystery to
me.  It shouldn't make any difference,
performance-wise.

Racing sparks are a symptom.  The most common cause of
racing sparks is over coupling.  Too much input power
can also cause racing sparks--how big is your power
supply? Additionally, racing sparks can sometimes be
cured by using a bigger top load.  Of course, if you
are using a pre-tested design like the one from J.H.
Couture's book, then the racing sparks are a bit
perplexing.

Wish I could be more help.  I'm as puzzled as you are.

Greg
http://hot-streamer-dot-com/greg

--- Tesla list <tesla-at-pupman-dot-com> wrote:
> Original poster: "jpeakall by way of Terry Fritz
> <twftesla-at-uswest-dot-net>" <jpeakall-at-mcn-dot-org>
> 
> Hi All,
> 
> I Have a small coil I have been operating off
> various power sources. The
> specs are:
> 
> 5 1/2" helical primarry, 12 turns of 12 AWG auto
> wire
> 3/12 " secondary, 436 turns of 22 AWG anameled wire.
> 
> The circuit I have3 been using is from John
> Couture's book, and in it one
> side of the transformer goes to one side of the tank
> cap, and the other
> trans lead to the other side of the tank cap. One
> side of the cap goes to
> the SG, and the other to one end of the primary. 
> The aligator clip side of
> the primary goes to the other end of the SG. On
> other circuits out there,
> like on Gary Lau's site, the trans leads both go to
> the spark gap, with the
> tank caps going between one end of the SG and the
> primary.
> 
> What is the difference between these two set ups? I
> tried the way it is on
> Garry's site, and it seems to work better, but I get
> tons of racing sparks.
> I had previously been using a .038 tank cap,, and I
> went down to .021 .014,
> still getting racing sparks. Very little backfire
> from the safety gap
> however. After a few seconds, I blew a tank cap. 
> 
> Is it just that the other circuit is way less
> efficient, and so I never had
> the racing spark problems? Is hooking it up as on
> Gary's site harder on the
> caps? 
> 
> Jonathan Peakall
> 
> 
> 


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