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RE: Reducing Inductance In Caps And ?, Was RE: Reducing Self Resonance In Rolled Caps



> -----Original Message-----
> From: Tesla List [mailto:tesla-at-pupman-dot-com]
> Sent: Tuesday, February 15, 2000 10:27 PM
> To: tesla-at-pupman-dot-com
> Subject: Re: Reducing Self Resonance In Rolled Caps
> 
> 
> Original Poster: "Bunnykiller" <bigfoo39-at-idt-dot-net> 
> 
> Tesla List wrote:
> 
>  SNIPPREZ...
> 
> 
> > Has this been tried?
> > If yes, What are the results?
> > Would this prevent self resonance?
> > 
> > Many Thanks,
> > Bill Parn
> 
> 
> Hi Bill...
> 
> many of the professional cap companies use this method    it reduces the
> charge /discharge time by a few nanoseconds  ( it reduces the inductance
> in the cap) 
> 
> not to sure what you mean by self resonance tho    if you are refering
> to the resonance between the power supply and the main cap ...   i dont
> think extended foil design makes a difference there  
> 
> Scot D
> 
> 

I had read that rolled caps self resonate, because they are a cap
and a coil all at the same time.  However now I understand they must 
have really meant that rolled caps have higher inductance.  There
by slowing the charging and discharging time, that makes sense.

Now the question is if the inductance slows the charging and
discharging, would not that change the overall freq in the primary?

For TC use is it better to use extended foil design or the non
extended foil design in rolled caps?

Does this inductance change the overall capacitance?

Does it change the number of turns needed on the primary?

Many Thanks,
Bill Parn