Re: [TCML] pulse cap specs

[Yurtle Turtle <yurtle_t@xxxxxxxxx>]

I run my pig at 280 in, yielding 16.8 kV out. My safety gap is set just above that. I run my MMC (Multi Maxwell Cap) at five strings of two, or 75 nF 70 kV.

Adam

--- On Thu, 5/22/08, Jim Lux <jimlux@xxxxxxxxxxxxx> wrote:

> From: Jim Lux <jimlux@xxxxxxxxxxxxx>
> Subject: Re: [TCML] pulse cap specs
> To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
> Date: Thursday, May 22, 2008, 8:46 AM
> Yurtle Turtle wrote:
> > These caps hold up just fine in Tesla duty. I've
> got ten and have
> > never had a problem, even when pushing them over 400
> bps. The spec
> > sheet says they're good to 500 pps. The only
> problem is that you
> > don't know how much abuse they'veseen before
> you buy them.
> > 
> Keep in mind that pulses/sec is not breaks/sec, at least as
> defined by 
> the cap mfr.  A TC typically runs at almost 90% reversal,
> which is a lot 
> harder on the cap internals than the 20% or 50% often
> spec'd in the 
> capacitor data sheet in connection with the life spec.
> 
> OTOH, reducing the voltage across the cap by a factor of
> two has a HUGE 
> effect on life.
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