Re: Maxwell capacitor 35Kv 0.03uf

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Dr. Resonance" <resonance@xxxxxxxxxx>


High frequency Tesla oscillator currents go both plus and minus 
literally in microseconds.  This plus to minus waveform transition is 
called a voltage reversal.  Example, a peak of 20 kV with a 95% 
voltage reversal means the cap would go from plus 19 kV and then 
swing to minus 19 kV in typically 2-3 microseconds.  This is a very 
high rate of dV/dt and with high peak current a high rate of 
dI/dt.  This rapid transition puts enormous strain on a capacitor and 
usually requires "extended foil" construction techniques to handle the strain.

Dr. Resonance


> Hi all,
>
> I'm going to have to jump up and show my ignorance
> here but could someone please explain  the concept
> of voltage reversals? I've noticed this effect men-
> tioned a number of times in reference to pulse capacitors
> and I am able to tell the the higher this rating, the better,
> but that's about as far as my understanding of it goes ;^\
> Thanks in advance for your answer(s).
>
> David Rieben
>
> ----- Original Message ----- From: "Tesla list" <tesla@xxxxxxxxxx>
> To: <tesla@xxxxxxxxxx>
> Sent: Sunday, July 09, 2006 1:08 AM
> Subject: Re: Maxwell capacitor 35Kv 0.03uf
>
>
> > Original poster: "Dr. Resonance" <resonance@xxxxxxxxxx>
> >
> > Voltage reversals typical in Tesla circuits 90-95%.  This cap is 
> > only rated for max of 50% and average of 15% --- it would be pushed 
> > very hard if used in a Tesla oscillator circuit.
> > Dr. Resonance
> >
> > ----- Original Message ----- From: "Tesla list" <tesla@xxxxxxxxxx>
> > To: <tesla@xxxxxxxxxx>
> > Sent: Saturday, July 08, 2006 8:16 PM
> > Subject: Re: Maxwell capacitor 35Kv 0.03uf
> >
> > > Original poster: "C. Sibley" <a37chevy@xxxxxxxxx>
> > >
> > > The spec sheet for this capacitor is available on my web page:
> > >
> > > http://www.wackorama.com/tesla/maxwell_37667.jpg
> > >
> > > Curt.
> > >
> > >
> > > ----- Original Message ----
> > > From: Tesla list <tesla@xxxxxxxxxx>
> > > To: tesla@xxxxxxxxxx
> > > Sent: Saturday, July 8, 2006 11:43:10 AM
> > > Subject: Re: Maxwell capacitor 35Kv 0.03uf
> > >
> > >
> > > Original poster: "Dr. Resonance" <resonance@xxxxxxxxxx>
> > >
> > >
> > > What is the pulse duty rating for this cap?
> > >
> > > Dr. Resonance
> > >
> > >
> > > >Hey gang I have a Maxwell pulse capacitor for sale or trade for
> > > >Cornell Dubilier caps of 2000 Vdc .15Mfd if interested please
> > > >contact me off list.
> > > >Specks are
> > > >Catalog no 37667
> > > >Rated Cap 0.03 uf
> > > >Voltage 35Kv
> > > >Ser no. 9645C0116
> > > >