[TCML] Terry Filter Caps
Gary.Lau at hp.com
Sun Aug 24 15:20:48 MDT 2008
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
> -----Original Message-----
> From: tesla-bounces at pupman.com [mailto:tesla-bounces at pupman.com] On
> Behalf Of FIFTYGUY at aol.com
> Sent: Friday, August 22, 2008 10:48 PM
> To: tesla at pupman.com
> Subject: Re: [TCML] Terry Filter Caps
> In a message dated 8/22/08 10:29:59 P.M. Eastern Daylight Time,
> piranha at drsstc.com 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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