TU56/TC11 restoration - VARIAC question

[woodelf]

vrs wrote:

>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.
>
>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.
>
>Finding a 100uf oil-filled "run" cap is not easy, and they tend to be
>expensive (as Jay pointed out).
>
>  
>
Well they are more around I think do to the vacumm tube audio field and 
may want to look there.
http://www.percyaudio.com/   some nice NEW caps here.  Still about $50 
for 100uf.

>The TU55 uses a 7uf oil capacitor in this role, which again argues for a
>"run" capacitor, except the values are wildly different.  Is it possible
>"start" caps were used in the TU56 to save $$, but are being derated somehow
>so they can be used as "run" caps??
>
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