[Boatanchors] Navy RAL Filament Voltage: Solved

[Rob Atkinson]

> A lot of the “mica look alike” caps that are of a high value are actually
> the old wax paper types in a flat pack that look just like the mica
> construction from the outside.

That's one of the reasons why I shotgun all of them out.  There's an
arcane, complex and difficult to remember way to tell the real micas
from the micamolds but pigs will fly before I ever commit it to
memory.

> Most failed micas do so because of silver
> migration which can occur when there is a high DC differential across the
> capacitor but they normally don’t develop the high resistance leakage common
> to older foil/paper types sealed in wax.

Another reason why I shotgun out the old micas. Depending on the
circuit they get replaced with either ceramic or polypropylene film.

Rob
K5UJ