>From pratical experience I find that 1 cm is not very much when you are
talking about 20 kV. For 20 KV I would have a lot more
clearance than 1
cm.
Now maybe you do not have HV across the capacitor. If it
is the plate
tune capacitor you will have a coupling capacitor that
blocks the DC and
then you are only talking about RF voltage breakdown.
Remember Ohms Law is
the 'law' and
E square = P*R where P is your Power and R is your Z at
that point.
I have a feeling that you are looking for a vacuum
capacitor
Denis Ve6AQ
Richard wrote:
> >My understanding is that air breaks down at 20,000 v /cm.
> >Not sure what temp or RH.
>
> ? Altitude counts too. When in doubt, use a high-potential tester.
>
> cheerz, Ron
> >
> >
> >WYsixK wrote:
> >
> >> What spacing do I need between capacitor plates (air dielectric) for
> >> 12000 volts and where can I find tables for this stuff?
> >>
> >> Thanks!
> >> Michael
> >>
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> - R. L. Measures, a.k.a. Rich..., 805.386.3734,AG6K,
> www.vcnet.com/measures.
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