[AMPS] Re: Need info on mica caps

[Tom Rauch]

> >Just as a ball park reference, in my hand is a 258 pF 8KV 7A @ 3mHz. It
> >measures 3X3X2 1/4 inches.
> >
> €  As I understand it, the current handling ability of mica caps 
> decreases above 3MHz.  

> Rich...

Not according to the data I see in about a half dozen places. Many 
mica capacitors continue to increase in current with frequency, 
depending on the style of construction and value, way up into VHF.

Multi-layer micas are a very common high current  VHF capacitors.

Mica does not become a poor dielectric at 3 GHz, let alone 3 MHz. 
Especially Ruby Mica, which is used in some of the lowest ESR 
capacitors available for microwave.
73, Tom W8JI
w8ji@contesting.com

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