Re: [TCML] Capacitors for MMC

["Shaun Epp" <scepp@xxxxxxx>]

I don't think those capacitor will work for Tesla coils.  If you look at the 
curves of applied voltage vs frequency on the web site, these capacitors 
roll off at much lower frequencies than we work with.  In other words we 
couldn't apply a high voltage to them at primary/secondary frequencies.

See 
http://www.kemet.com/kemet/web/homepage/kechome.nsf/file/PHE450%20Series/$file/F3294_PHE450.pdf

Shaun Epp



> Date: Sat, 11 Dec 2010 10:10:46 -0800
> From: "Bob Deuel" <k2glo@xxxxxxxxxxxxxx>
> Subject: Re: [TCML] Capacitors for MMC
> To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
> Message-ID: <591A78BF7702437CA88E9B2C888E3D99@bdeuel64>
> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
> reply-type=response
>
> Thank you Bert. That is exactly the information I was looking for.
> Bob
>
> ----- Original Message ----- 
> From: "Bert Hickman" <bert.hickman@xxxxxxxxxx>
> To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
> Sent: Friday, December 10, 2010 10:56 PM
> Subject: Re: [TCML] Capacitors for MMC
>
>
> > Hi Bob,
> >
> > Per the following site, the PHE431 series is an obsolete polypropylene
> > film cap that has been superseded by the Evox Rifa PHE450 series. They 
> > are
> > indeed constructed with a polypropylene dielectric with double metalized
> > polyester film as electrodes (i.e., the polyester is used as a mechanical
> > structure but NOT actively used as a dielectric in the capacitor). The
> > series is rated for high frequency applications with high current stress.
> > Sounds like a potential TC MMC app to me... :^).
> >
> > http://www.pikpower.com/new site/evoxrifa_b/evoxrifa_crossref.html
> >
> > The specs for the PHE450 series can be found here:
> >
> > http://www.kemet.com/kemet/web/homepage/kechome.nsf/file/PHE450%20Series/$file/F3294_PHE450.pdf
> >
> > Good luck,
> >
> > Bert
> > --
> > ********************************************************************
> > We specialize in UNIQUE items: coins shrunk by ultra-strong magnetic
> > fields, Captured Lightning Lichtenberg figure sculptures, and scarce
> > technical Books. Please visit us at http://www.capturedlightning.com
> > ********************************************************************
> >
> > Bob Deuel wrote:
> > > I picked up some 100n (0.1uf) @ 1000v and 33n (0.033uf) @ 1500v
> > > "RIFA 431" series capacitors at a swap meet that I would like to use
> > > for a MMC. I assume that they are film capacitors. They have light
> > > blue 1.2"x0.9"x 0.55" rectangular plastic cases with radial leads. I
> > > have tried to find catalog reference data for the RIFA 431 series but
> > > I am not having any luck. I can find other series of Evox RIFA (now
> > > Kerment) capacitors but not the "431". My main question is if anyone
> > > knows if they are pulse rated and the type of film dielectric they
> > > have. Also has anyone sucessfully used them in a MMC? Thanks in
> > > advance, Bob _______________________________________________ Tesla
> > > mailing list Tesla@xxxxxxxxxx
> > > http://www.pupman.com/mailman/listinfo/tesla

_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxx
http://www.pupman.com/mailman/listinfo/tesla