"Chuck Harris" wrote in message
...
[snip]

The tolerance has nothing to do with manufacturing
capabilities, or
price, and everything to do with the highly variable
nature of the
oxide layer.

-Chuck, WA3UQV


OK, I'll grab some of those old Ducatis and check 'em. I'm
sure they haven't seen a polorizing voltage in at least 25
years, because that's when I bought them as surplus.

Then I'll run 'em up to their rated voltage for 24 hours and
recheck.

I'll see how much extra voltage they take and hold them at
that voltage for another 24 hours.

Just for curiosity, I'll also check the ESR at each step
with my Dick Smith meter.

I know none of this is lab quality procedure, but if there's
any gross changes, I think I'll catch 'em.

Frank Dresser