RE: [TCML] Terry Filter Caps

["Lau, Gary" <Gary.Lau@xxxxxx>]

I don't believe that caps used in a Terry filter need to follow the same criteria for being "good" as caps used for a tank capacitor.  The current in Terry filter caps is limited by those big 1K resistors, and is very small compared with what a tank cap sees.  Typical values for ESR and ESL in any kind of cap should present no problem in a Terry filter application.  I have used ceramic doorknob caps, and even ceramic disc caps, provided they have a suitable voltage rating, are fine.

Regards, Gary Lau
MA, USA

> -----Original Message-----
> From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On
> Behalf Of FIFTYGUY@xxxxxxx
> Sent: Friday, August 22, 2008 10:48 PM
> To: tesla@xxxxxxxxxx
> Subject: Re: [TCML] Terry Filter Caps
>
> In a message dated 8/22/08 10:29:59 P.M. Eastern Daylight Time,
> piranha@xxxxxxxxxx writes:
>
> >There is no problem at all using other near value caps.   Whatever
>
> >DigiKey has that's close is fine.
> >From the horse's mouth!
>
>     Just keep in mind you should still use "good" caps.  Self-healing, low
> ESR, low L, high peak current, suitable voltage ratings.
>
> -Phil LaBudde
> Center for the Advanced Study of Ballistic  Improbabilities

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