[sdiy] How I spent my week (Polymoog restoration-long)

[Kevin Lightner]

>  >
>[...]
>Power supply-
>Replaced all electrolytic caps with new, higher voltage types
>[...]
><
>
>I have read somewhere that the voltage rating for power supply caps 
>should be no more than about 50% of the output voltage, to preserve 
>the longevity and effectiveness of the capacitor. Is this true?
>
>Paul

I don't go very much higher. Size usually dictates what I can do anyways.
However, some caps are very small even with these better ratings, but 
they're not always good at handling the same current or have other 
considerations in terms of frequency.
You wouldn't want to put a smaller physically sized electrolytic in, 
say, a TV's high voltage horiz amp.
I usually just put in a 50v if it was a 35v and that sort of thing 
and usually only on linear supplies.
The higher you go, the more expensive they get, which is why many 
units have marginally rated caps anyways. The instruments would have 
cost too much to make.
Putting a higher rating in some power supplies is probably better 
than putting in their originals. ;-)

-- 
Regards,
Kevin Lightner

Myself: http://www.synthfool.com
Service and sales: http://www.moogmusic.com/service.php
Sales: http://www.cluboftheknobs.com
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