Tom - WØEAJ
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Hearing the plates shorting is your first clue - another way to find the
points at which they DO short, is with an ohmmeter (analog is best).
Aluminum plates of caps, in some climates, develop something akin to "tin
pest" in that metal. Aluminum oxides begin to "grow" on the plates; they
can and will short out. Old fashioned contact-burnishers (for relays) work
swell for getting rid of them, but in severe cases, you'll have to use
sandpaper. Remember, the oxide IS kind a semi-conductor, so be sure to get
all the remains OUT.
