RE: Can anyone explain this???

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

Original poster: "Loudner, Godfrey by way of Terry Fritz <twftesla-at-uswest-dot-net>" <gloudner-at-SINTE.EDU>

.Hi Tyler

I am happy to see you have already installed the 50 amp variac I sold to
you. Its really going to be interested to see how those reconstructed NST's
perform on your large Tesla coil. By adding those protection caps, you have
put another tank cap across your transformers that will combine with your
main tank cap. If you initially designed for a specific capacitance form
your main tank cap, then the protection cap will throw this off. You may
have to widen your spark gap to adjust for the extra current coming from the
protection cap. But if you widen your spark gap, then the tank circuit will
run at a higher voltage, thereby putting your NST's at more risk. So we have
a situation where the protection caps may actually put your NST's at more
risk. 

Godfrey Loudner


 

> -----Original Message-----
> From:	Tesla list [SMTP:tesla-at-pupman-dot-com]
> Sent:	Thursday, April 12, 2001 9:19 AM
> To:	tesla-at-pupman-dot-com
> Subject:	Can anyone explain this???
> 
> Original poster: "Tyler Steineckert by way of Terry Fritz
> <twftesla-at-uswest-dot-net>" <tsgeoman-at-qwest-dot-net>
> 
> I am getting very close to completion of my huge coil.
> Today I put some small caps on my transformers because I was told by
> fellow
> coilers that it would help to protect them.  What I did was to put 4
> 500pf
> 20kv caps, putting two on each side of the tranny, to ground. The tranny
> is
> two modified NST to run 12kv 400ma.
> Then just for fun, as I have done before, I ran up the roto and gave it
> some
> power.
> Sudenly the power output of my tranny seemed to double.  There were huge
> sparks coming from the roto. I thought it was a phase problem but as I
> adjusted the phase of the motor the sparks got even bigger and started to
> fire the safety gap on the trannys. Then I noticed that the power pull
> went
> from 30 amps to 38 amps.
> I got an 8 amp jump, just adding these caps.
> Not that any of this is bad. It just suprised me to se such a power
> increse
> in input amps as well as visiual output from the trannys by just adding
> these small caps.
> Have I done something wrong?
> Is the power increse going to hurt my trannys?
> Any coments would be greatly appreciated.
> 
> Thanks all,
> Tyler
> P.S. You can see pics of the entire coil setup as well as the new caps
> that
> I put on at my web sight under TRANNYS on my 3rd coil.
> www.users.qwest-dot-net/~tsgeoman/coils.htm
> 
> 
>