Re: [TCML] For the SISG experienced out there

[bartb <bartb@xxxxxxxxxxxxxxxx>]

Hi James,

Your cap size is very large. Why did you choose to use this size of cap?

Your description of firing is exactly as Phil's. Yes, it does sound 
"scary". Terry Fritz I think recognized the dangers early on and 
mentioned it from time to time. It is a dangerous coil in the fact that 
there are no audible warning signs that power is applied until the 
Sidac's fire! Certainly a coil that could bite lethally if one is not 
follow a procedure. But still, just a coil with a gated spark gap in the 
end.

Take care,
Bart

James wrote:
> 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
>   

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