On 3 December 2014 at 13:38, Marcus Bowman <[email protected]> wrote:
> I don't believe 1500 Million hours. It is, in any case, a calculated value > (not that there's anything wrong with that). If the unit contains large > capacitors, 1500 hours is a much more realistic figure. Short; yes. But > realistic. 63 days? That doesn't seem _that_ much more plausible than 170,000 years. Given that (statistically) only 38% of parts would be expected to get to the MTBF time it looks even worse. The background here is a 24V supply for a pulse clock. The clock has been running since 1957 and still would be were it not that the master clock was in a demolished building. I would like to think that the PSU I choose would last for 10 years or more. (I plan to put a hot-swappable replacement in the case too) -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto ------------------------------------------------------------------------------ Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=164703151&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
