RE: [TCML] SISG coil

["Phil Tuck" <phil@xxxxxxxxxxx>]

Bart,
I'm just curious, but it look like the caps are located on two brackets
which bolt direct to the wood. If so did you not get problems?

Regards
Phil

www.hvtesla.com

-----Original Message-----
From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On Behalf
Of bartb
Sent: 21 August 2010 01:27
To: Tesla Coil Mailing List
Subject: Re: [TCML] SISG coil

Thanks James,

Yeah, built one myself
http://www.classictesla.com/photos/sisg/sisg.html

My output was ok but not quite wonderful. I suspect due to running a low 
60nF which is why I was curious about your cap size. A couple weeks ago 
I pulled the SISG out of the base as I plan to refit this coil for a 
DRSSTC (due to the turns and frequency, it's usable in a DR, although 
maybe not ideal).

Take care,
Bart

James wrote:
> Hi Bart, prolly 100nF in that vid. I normally run that coil on three
MOT's,
> sec's in series, pri's in parallel. A large choke is used to control the
> current. Normally (using MOT PS) the SISG coil uses 144nF. Firing at 12KV.
> The firing voltage is determined by the SIDAC string. Each module conducts
> around 900 to 1000 volts. I am using 12 when running on the MOT's, 16
> modules when using the pole xmfr. Thing about the SISG coil is how spooky
it
> is. When the coil is energized, but the variac is set lower than the
firing
> voltage, there is no noise. Back in the old days with the spark gap coils
> you could hear the coil was energized (it would hiss) even if it wasn't
> firing the spark gap.  Since the SISG runs on DC, extreme caution is
> required. James
>
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