On Sun, Mar 11, 2001 at 02:51:56PM -0000, Alan wrote:
>
>
> Gary,
>
>
> Maybe all the 'bad' OM-2s (due to circuits) have already been thrown away.
> Generally speaking, poor electronics fail faily quickly. The good stuff
> last for a while until (eventually) a resister or similar fails at the normal
> fail rate (anyone know what that is?).
Have you ever wondered of MTBF-values ? Very comon as value for trstiness of
computer disk drives. 500 000h live time for a hard drive??
Well it is not the time a drive will last between two repairs. It is a rahter
theoretical
value. Interesting is the reciprocal value, which is the likeliness your
equipment will
fail. Too sad, Ive no MTBF values for OM-2S circuits. But this MTBF may give
an idea of reliability of (good) electronics.*)
Frieder Faig
*) Constant MTBF-values over the whole life time are used for electronics in
general.
The reliability of mecanical parts is different. It decreases due to wear it is
not possible
to descibe the failure with a single value over the whole live time.
~
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