exray wrote:
Grumpy The Mule wrote:
Howdy,


Without seeing the parts I can only take a WAG at what the
capacitors in question might be. This web site might help.
http://www.faradnet.com/

UNKNOWN TYPE AND APPLICATION:
1. Blue, really shiny, flat, and small like a disc ceramic.

Possibly Murata (or others) ceramic capacitors designed for
use in AC line filters.

I'll add my cents worth.
A few years ago I bought some high-voltage disc ceramics like you are
describing. 6kv rating in 'rf' values like "681" (680pf). About 10mm
in diameter and 5cm thick. The 1kv ones are about half that size.

I used them in the output pi-network loading of a Galaxy 5 and they were
up to the task although they are plain Z5U types.

They are marked, btw, no mystery as to their rating. You don't normally
look at something this small and think 6kv.
=======================================
They might be OK capacity and voltage wise ,but are possibly not
suitable to handle RF current ,so when using them in HV RF circuits it
might be better to use a few in parallel.

Frank KN6WH