TU56/TC11 restoration - VARIAC question - test-drb@ccmp.vtda.org

18 Mar 2005

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 From: "vrs" <vrs at msn.com>
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What you are saying is consistent with what I see on most sites selling
these things.  There, "run" caps are generally oil, and "start" caps
are
generally electrolytic.  The exception being the occasional "start/run" cap,
whatever that is. 
 I believe that refers to how it is used. During the start,
it is connected to a high current coil but during run, is
is connected to a high resistant one to create phase shift.

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The original caps in the TU56 are high capacitance, and clearly
electrolytic.  But they appear to be wired for continuous phase shifting
duty.  Hence some of the people on the list insisting that they are "run"
caps, and that the beefier, more expensive "run" cap should be used. 
 Most likely to make the motor run smoother, as though there
were more phases to the AC.
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Dwight