UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Restoration of a 1937 first generation pre-war television (HMV 900)

Maarten · 24th Oct 2020, 1:31 am

Even when sealed, some moisture ingress is unavoidable. Applying a voltage to a leaky capacitor will heat it up a bit, sothe moisture might be absorbed in the oil or even vent out a little bit.

A good sanity check is that electrolytics above roughly 500-600V are mostly not economic to manufacture, so a paper cap was to be expected.

24th Oct 2020, 1:31 am	#57
Maarten Dekatron Join Date: Dec 2007 Location: Haarlem, Netherlands Posts: 4,199	Re: Restoration of a 1937 first generation pre-war television (HMV 900) Even when sealed, some moisture ingress is unavoidable. Applying a voltage to a leaky capacitor will heat it up a bit, sothe moisture might be absorbed in the oil or even vent out a little bit. A good sanity check is that electrolytics above roughly 500-600V are mostly not economic to manufacture, so a paper cap was to be expected.