[Amps] Mica cap substitute \ alternative

[R L Measures]

It's called Dissipation Factor.  For example, Nylon, Delrin and Vinyl  
are excellent insulators at 50Hz, but at 50MHz they are not.

On Jul 12, 2006, at 2:13 AM, Peter Chadwick wrote:

> Rich said:
>
> >Unlike barium-titanate dielectric (ceramic)  doorknob capacitors,
> whose current carrying ability increases from 5MHz to 30MHz, mica
> dielectric caps' current carrying ability decreases above 5MHz.<
>
> Yes, but WHY? What's the mechanism that allows mica to be a  
> perfectly good insulator in other application, way way up in  
> frequency?
>
> 73
>
> Peter G3RZP
>
>

R L MEASURES, AG6K. 805-386-3734
r at somis.org