[fenbach]

i tested the various caps in the 30-4561 can from a philco F-1540 for leakage and found that the magic eye began to close at the voltages listed below. all plausible, remarkable even, for a can that's 80 some years old.

rated.............measured......leakage
capacitance....capacitance....at V =

.01--------------.02-------------500+ (this cap is attached to a plate ~200 V)
.05--------------.1---------------400
.25--------------.4---------------250
.25--------------.4---------------250
.5-----------------1--------------100