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 Strange Capacitors

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RioRadioAtlanta
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Join date : 2015-03-07

PostSubject: Strange Capacitors   March 7th 2015, 11:37 am

Hi, I am working on a 1938 Centrum jw5 table radio. It was made in Sweden and the capacitors have nomenclature that I've never seen before. A typical one reads: 1000000cm/1000v  What is this in uf??? I've looked online, but I can't find any reference to it. Can anybody help?
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FrankB
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Join date : 2010-11-22

PostSubject: Re: Strange Capacitors   March 14th 2015, 6:23 pm

You might try posting this question on the UK Antique Radio Forum.
IIRC, There are a few Swedish members on it.
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FrankB
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PostSubject: Re: Strange Capacitors   April 27th 2018, 9:33 pm

I have been looking into that rating you posted. I am stumped.
Very strange marking. I have not found anything that explains it, anywhere 
Ii have looked.
.
The "cm" is the oddball thing.

Now if it was in PFD/MMFD/NFD it would be easily convertible.
 (If they really meant pfd, it would be 1F, which is a lot of capacitance for a radio, especially in 1938, that would have been the size of a few rooms in a house!)

Its 1KV rating means its likely across the output transformer winding, correct? 
Typically, I have seen them in the .01 to .008 mfd range used in that fashion, and up to 2KV rating, depending on the B+.
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