[Milsurplus] Bathtub Capacitors

[Bruce Gentry]

The cans are almost always tinned steel. The oil may be chlorinated, but 
usually not for these small size ones unless they are marked. I have 
never seen any difference in failures between fully isolated and 
grounded condensers. Failures of the bathtub style condensors is quite 
rare, and the few I have seen was simply leakage, no dead shorts. Some 
of these bathtub types are electrolytic, they lose capacatance and 
usually don't re-form, I gut the case and put a moderrn one inside.   

   Bruce Gentry, KA2IVY

J. Forster wrote:
> Hi,
>
> Does anybody know:
>
> What are the cans of WW II bathtub capacitors made of? Brass or Steel?
>
> What is the plating? Tin? Zinc? ??
>
> What kind of oil was used to fill them? Mineral? Something chlorinated?
>
> Is there an increased failure rate on caps with one side electrically tied
> to the case v. those with both terminals of the cap floating?
>
> Thanks,
>
> -John
>
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