Re: Printed circuits caps

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

----- 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?
> Unfortunately fiber-glass is very lossy. That is good way to  make quickly
> filter caps but out of question for pulse caps. Teflon PCBs are another
> They just tend to be very expencive. :(
> Long-term lasting depends a lot on manufacturing process of the PCBs. If
> 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