harman & collins specs for condenser

First timer needs help. What are the specs for h&c mag condenser & how can I test ? Do you know where they might be available? I'm using a Mallory condenser and they go away after a couple of hours use.

 

all condenser are the same as long as they were made for the voltage being used. 6volt with 6 volt and so on

 

Thanks for the reply. What I'm looking for is the # of millefabs (sic) that are required for the magneto not the distributer.