[R-390] A question about silver-mica capacitors failures.

[Jacques Fortin]

It was flagged by many contributors to this site that the number of silver
mica capacitors failures is rising.

As the failure mechanism seems to be understood (silver migration within the
capacitor package), it is not clear for me if this occurs only when a
potential difference is applied to these capacitors, or if it can be
triggered only by the time, even if the radio containing those capacitors
was left unpowered for years.

I will appreciate to know your thoughts about it.

 

73, Jacques, VE2JFE