Re: Electrolytic caps and Apple analog circuits (semi on topic)

["jsnospam@cimmeri.com" <js@cimmeri.com>]

On Jul 9, 3:43 pm, "Michael J. Mahon" <mjma...@aol.com> wrote:
<<  Unless an electrolytic capacitor is stressed by large ripple
currents or a marginal voltage rating, elevated temperature is the
main killer.>>

Interesting.   Is that for the simple reason that higher temp equals
higher evaporation rate?

What is it I've read about the electrolyte tending to dry out in the
absence of a sufficient rejuvenating voltage?   What's the best way to
keep electrolytics happy?  Use power supply once a month, for
instance?



<< Position shift is also readily caused by DC leakage in the sweep
circuits that drive the yoke.  As the schematic showed, the
electrolytic cap in the horizontal yoke coil circuit would produce
just such a shift if it were leaking>>

How does one test for leaking current?  Is a good ESR not good
enough?


OT MAC STUFF:
<< BTW, the centering permanent magnets are usually two rings with
tabs >>

Yes, that's what's there... as well as small cubic magnets all around
the yoke.   The Apple service manual seems to suggest it's normal to
adjust the centering using the rings.

~ J