At 09:51 PM 10/04/2010, Carl wrote:
>I dont know if it still holds with some caps but they used to have a memory.
>IOW if run for a long spell (weeks, months) at say 60% of ratings and then
>run at max they had a tendency to fail.
>
>Carl
>KM1H
Yeah, that's what I was always lead to believe. I was told that it is
better to run your caps very close to their voltage rating. Dunno if
its a wives tale or not.
I usually sail pretty close to the wind. I work on having 1 spare
capacitor worth of headroom in a bank. For example, if the dc voltage
is 4500V, then I would use 11 x 450VW capacitors in the bank. Never
had a cap go bang on me by using that crude formula.
73, Alek.
VK6APK
From sunny Binningup, Western Australia
http://www.qrz.com/db/vk6apk
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