On Wed, Dec 03, 2003 at 10:48:35PM -0800, vrs wrote:
> Hi,
>
> I've got an electrolytic I pulled from my TU56 drive because it had a big
> crusty electrolyte extrusion through the vent plug in the top.
Ewwww.
> .... "SPRAGUE 100 MFD 55V - 60CY A5030". It is 2" in diameter and just
> over 4" tall, with two solder lugs on top. I think they are connected to
> the drive motors.
Yes. The motor start capacitors.
> I have looked for replacement electrolytic, but they all have way more
> capacitance or way more voltage rating, and are nowhere near the right
> physical dimensions.
Voltages that are "too high" are no problem. Too low is a big no-no. You
want something with a fairly close capacitance match, because too little
would probably increase the startup time on the motor and might cause issues
if too far off.
> Is there a source for exact replacements?
Not that I am aware of.
There are others (David Gesswein?) who have had to replace TU-56 motor caps.
I have not yet had to do so (but it's been years since I fired mine up, since
I've only recently repaird my -8/e PSU). My personal priority would have to
be voltage and capacitance over physical size.
A caveat - these are not filter caps. They are motor start caps (or they
might be "motor run" caps. They will be hard to find an appropriate sub
for.
-ethan
--
Ethan Dicks, A-130-S Current South Pole Weather at 04-Dec-2003 08:00 Z
South Pole Station
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Ethan.Dicks_at_amanda.spole.gov http://penguincentral.com/penguincentral.html
Received on Thu Dec 04 2003 - 02:05:35 GMT