05-17-2012, 09:09 PM
If it's a pair of micas inside it may be alright to leave alone, the values are small enough to be micas. I opened up a Philco Bakelite block condenser once that had micas inside. If you do need to replace them then you can also use precision ceramic caps, I've used those a few times in various things.
Regards
Arran
Regards
Arran