[AMPS] Capacitor voltage rating?

[Fraser Robertson]

I am building a HF LPF to handle 150W.  In a 50R system that equates to 87V
rms, or 245Vpp.

I have some polystyrene capacitors rated at 630V dc.  Would these be ok?
How do I de rate the dc voltage for RF?  Presumably it depends on the
dielectric.  Would I be better off with silvered mica caps, readily
available at 500V dc rating?

I appreciate that the voltage could go higher into a non 50R resistive load.
They seem to get away with very small capacitors in modern black boxes.

73 Fraser G4BJM


--
FAQ on WWW:               http://www.contesting.com/ampfaq.html
Submissions:              amps@contesting.com
Administrative requests:  amps-REQUEST@contesting.com
Problems:                 owner-amps@contesting.com
Search:                   http://www.contesting.com/km9p/search.htm