[R-390] Silve Mica cap question

[Perry Sandeen]

Gents,

Wrote: I have had very poor results with NOS micas from a variety of sources that were made before 2000, so I don't buy them anymore.  <snip>

Could you please expand?  

I have a bunch of  epoxy dipped silver mica’s that I’ve acquired over the years.  Some are probably 30+ years old and most don’t have a date stamp on them.  Or are you referring to NOS molded Micas?

If you are referring to the epoxy dipped SM’s, is there a simple way to test for leakage?  I have a Marconi LCR bridge that is SS.  Does one need a Sprague TO-6 or something similar with a HV leakage test?

I sure don’t want to have to replace a replacement but I also don’t want to throw away the SM’s I have.

Regards,

Perrier