Re: Printed circuits caps

• To: tesla-at-pupman-dot-com
• Subject: Re: Printed circuits caps
• From: "Steve Cook" <Steve-at-g8cyerichmond.freeserve.co.uk> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)
• Date: Mon, 27 Sep 1999 03:36:36 -0600
• Approved: twftesla-at-uswest-dot-net
• Delivered-To: fixup-tesla-at-pupman-dot-com-at-fixme

I seem to remember that in the Scientific American in the late sixties or
early seventies a design for a nitrogen laser that used epoxy PCB.
Unfortunately I don't have comaprison tables showing loss, but the same
material is used for transmission lines at UHF and microwave frequencies. Is
it really worse than glass as per SWCs? Unfortunately I can't measure RF
losses.

----- Original Message -----
From: Tesla List <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Sunday, September 26, 1999 6:33 PM
Subject: Re: Printed circuits caps


> Original Poster: "Harri Suomalainen" <Harri.Suomalainen-at-pp.inet.fi>
>
> > has anyone thought of using printed circuit board for making pulse caps?
I
>
> Unfortunately fiber-glass is very lossy. That is good way to  make quickly
some
> filter caps but out of question for pulse caps. Teflon PCBs are another
thing.
> They just tend to be very expencive. :(
>
> Long-term lasting depends a lot on manufacturing process of the PCBs. If
there
> is even tiny air bubbles between the conductor plates the partial
> discharges will
> eat the way through in time. Anyone out there with info on typical
> manufacturing
> processes for PCBs?
>
> Harri
>
>
>
>

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