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Old 23rd Oct 2020, 9:52 pm   #54
beery
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Join Date: Jun 2006
Location: Ware, Hertfordshire, UK.
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Default Re: Restoration of a 1937 first generation pre-war television (HMV 900)

Quote:
Originally Posted by Ed_Dinning View Post
Hi Catkins, I'm a little puzzled as to how these caps reformed as they appear to be non polarised types. Also being sealed ther should have been no way for moisture to escape.
Ed
Hi Ed,
You've beaten me too it.
I was wondering the same thing.
Maybe any trapped moisture was moving about or being split into oxygen and hydrogen to reduce the leakage current. Or if some how the oil has decomposed, passing a current through it alters it chemically in such a way as to restore its insulating characteristics again. Either way, I'm not surprised it wasn't particularly successful.

Cheers
Andy
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