[ARC5] Carbon mic rejuvenation

[Robert Nickels]

I though the topic of rejuvenating carbon mic elements came up on this 
list a while back but a check of the archives came up empty, so maybe 
someone will remember or can direct me.   I have two RS-38A  type carbon 
hand mics and both work but produce substantially less audio than other 
mics.   I don't know if this is due to some design difference or aging 
effects but I'd like to see if I can improve the output.    If I recall 
the method involved applying a AC voltage.

Thanks and 73,

Bob W9RAN