Re: SRSG and Terry filter overheating

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

Original poster: Mark Broker <mbroker-at-thegeekgroup-dot-org> 

.011uF is almost precisely the resonant capacitor value for your NST.  With 
a SRSG and your modified NST you could easily run up to about .030uF. (LTR 
for a 15/60 is .0277uF)  Resonant rise, safety gaps set too wide, and poor 
SRSG timing was the cause of the Terry Filter demise.  Of course the good 
news is that $15 in MOVs you can buy from anywhere need to be replaced and 
not your NST and/or caps!

For an explanation of resonant rise, see Richie Burnett's 
site:  http://www.richieburnett.co.uk/tesla.shtml
see the Resonant Charging section.

I would definately add more primary capacitance.  I have to recommend, of 
course, the ubiquitous Geek Group Bucket Cap or the Geek MMC caps:
http://www.thegeekgroup-dot-org/projects/bucketcap
http://www.thegeekgroup-dot-org/mmc
But of course any "normal" TC cap will suffice.

Cheers,

Mark Broker
Chief Engineer, The Geek Group


On Wed, 24 Sep 2003 08:00:12 -0600, Tesla list <tesla-at-pupman-dot-com> wrote:

>Original poster: "Robert Hanford" <pomnept-at-comcast-dot-net> Thanks Terry,
>I'm running a 15k 60ma (supposedly 70-75ma w/ some shunts removed) NST with
>a .011 MMC. Could you clarify what you mean when you say "the coil could be
>trying to go over voltage?" I will check my wiring thoroughly
>tomorrow.Thanks for answering my newbie (kind of ) questions.
>Rob