RE: [TCML] For the SISG experienced out there

["James" <mustang3@xxxxxxx>]

Hi Bart,
  I have run my SISG coil with 3 MOT's wired sec in series. Ran best on
11 modules (900 volts/transistor). Required the variac to be cranked all
the up to even spark roughly using 12. You tune it for a smooth spark
using the variac. I'm using 16 modules with my 14.4KV 10KW pole xmfr.
This transformer draws about 25A when the coil is operating. Both
current and voltage are controlled. The coil is 6.25" X 32" wound with
#26. 9" X 23" toriod. I'm using 133Nf cap and a flat pri tapped at 8.5
turns. My bridge rectifier is 64 5A diodes (16/string). As per Mark's
schematic, I wound a 23mH choke to protect the bridge. I enjoy playing
with the SISG coil. It's spooky as hell. Nothing happens when you plug
it in, then as you ramp up the voltage, it hits the firing voltage and
off it goes. I'm getting about 7' streamers. James

-----Original Message-----
From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On
Behalf Of bartb
Sent: Wednesday, May 07, 2008 9:31 PM
To: Tesla Coil Mailing List
Subject: [TCML] For the SISG experienced out there

Hi All,

I finally made my last purchase of SISG components tonight and enough 
for 6 Mark Dunn boards version 4. I'll be using a different IGBT however

and went with Terry's 50 ohm resistor for R4 (but upgraded to 3W). I 
only had a few items left so I figured I should dive in and get the last

three components as the list was quiet and allowed for some free time.

Question: Has anyone ran an NST type transformer (shunts minimized) into

an SISG setup (or beyond)? I'm planning on basically an 11kV/200mA NST 
of which will be rectified with 15kV/540mA HV diodes (full bridge 
configuration using 4 diodes). I'll be using 6 boards, so there will be 
some decent power to deal with. I'm just curious if anyone's been down 
this road that I'm traveling and could offer any advice on high power 
into the SISG.

Take care,
Bart
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