Excellent. Now we know for sure. Thank you John.
At 05:09 AM 3/5/99 -0500, you wrote:
>
>Message text written by Rich Measures
>
>>As I understand it, the lifespan of an electrolytic capacitor approx.
>doubles for each ten degrees C below its rated operating temp. --
>provided that the temp. stays above the minimum allowable.<
>
>>From an STC application note:
>
>"Reducing the element temperature greatly extends the life of the
>electrolytic capacitor. A component which is endurance tested for 1000
>hours with an element temperature of 85C can have a life expectancy of
>100,000 hours at an element temperature of 40C...The leakage current
>follows a logarithmic law, approximately doubling for each 10C increase in
>temperature."
>
>>From an RS Components application note:
>
>"As a rule of thumb, the useful life of an electrolytic capacitor can be
>considered to reduce by a factor of 2 for each 10C increase in operating
>temperature..."
>
>John Nelson
>GW4FRX
>
>
>
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