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Re: Apple /// & Vulcan IIgs Power Supplies went ka-boom



Oracle wrote:
On 8 Nov, 04:46, "atfphotogra...@gmail.com" <atfphotogra...@gmail.com>
wrote:
Hello,

I'm also confused as to the settings on the caps? What does the
40/085/56 mean?


The only important things are:

Capacitance (0,22uF) and tolerance (I can't see it)
Working voltage (250V)
Polarized or not (nonpolarized)
Distance between the two pin (you had to put in it the PCB)

I think you can find this kind of capacitor from a TV repair.

Actually, the capacitance is not at all critical (though if it is
too high, it will lower the effective rating of any fuse because
of additional reactive current).  A 0.1uF replacement for a 0.22uF
capacitor will work fine.

The highest working voltage you can find (that is at least as large
as the original rating) and will still fit is the best bet.  These
caps are directly across the AC line, and see any spikes on the line.

All non-electrolytic capacitors are nonpolarized, so no trouble there.

If a replacement will physically fit (not touching anything that gets
hot), it will work.  You can always bend the leads a bit to get the
spacing right.  (Use needlenose pliers to avoid high bending stresses.)

The critical thing about any replacement is that it be X2 rated, as the
one you show is.  These capacitors are designed to sit across the AC
line.  They are "self-healing" in the event of minor shorts (for most
of their life), and so are safe in this application.  The downside is
that their dielectric impregnant is really smelly.  ;-)

-michael

NadaNet 3.0 for Apple II parallel computing!
Home page:  http://home.comcast.net/~mjmahon/

"The wastebasket is our most important design
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