[Milsurplus] Recovering "Bumble Bee" Capacitors

[David Stinson]

At a recent hamfest, I bought a large bag of NOS Sprague
.1 uFd, 400 volt "Bumble Bee" capacitors, the ancestors of
 the "Black Beauty" type, for $3.
All of them were, of course, leaky to one degree or the other.
I took a handful of the worst leakers and put them in the stove
at 250 degrees for one hour.  The cases split, of course,
and a small amount of wax pooled under them.
I let them cool overnight and checked them again.
To my surprise, they check excellent!  Every one of them
came back.  At full voltage, they are in spec for capacitence 
and leakage is less than 10-20 microamperes at 400 volts.
Of course, with the cases split, they'll absorb water again. 
I'm thinking of resealing with liquid tape or the like.  
I have quite a few more of them left.
Perhaps if I use a lower temp and longer time, 
I can "dry" them without splitting the cases.  

73 Dave S.