Re: Cap question

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Gregory Hunter by way of Terry Fritz <twftesla-at-qwest-dot-net>" <ghunter31014-at-yahoo-dot-com>

Here's the rule for converting max DC to AC. Just
multiply the max allowable DC by 0.707 and that will
equal max allowable AC. For example, 20,000VDC x 0.707
= 14,140VAC. However, it's unwise to push a cap of
unknown quality to its maximum, especially in TC
service. I wouldn't push these caps above 12KVAC if
they were mine. They may have a safety margin
engineered in, but who knows?

Regards,

Greg
http://hot-streamer-dot-com/greg

--- Tesla list <tesla-at-pupman-dot-com> wrote:
> Original poster:
> "=?Windows-1252?Q?Hans_J=F8rgen_Grimstad?= by way of
> Terry Fritz <twftesla-at-qwest-dot-net>"
> <hansj.grimstad-at-consultit.no>
> 
> Hi !
>  
> I recently purchased some .02 MF/20KVDC rated caps
> for use in my coil.
> I've tried a couple of them and they seem to perform
> well. I've only
> tested the setup for very short runs, since I'm a
> bit concerned about
> how high AC voltage they can handle.
>  
> There's no manufacturer info on the caps. They're
> labeled F-C-1.
> D6-200-20, 69-18, 5910-9410310 (ceramic body, 12 cm
> long, 4 cm
> diameter). Does anyone have any experience with
> these caps in a TC ?
> What's the max AC voltage I can apply without
> worriying about seriously
> reducing the lifespan of these caps ?
>  
> Regards
> Hans J. Grimstad
>  
>  
>