[time-nuts] Power Back-up
G0MIC at aol.com
G0MIC at aol.com
Sun Aug 9 20:56:26 UTC 2009
On Sun, 9 Aug 2009
Robert Darlington wrote
>I use a 100 pound APC UPS (Smart-UPS 2200XL) that I was given a few years
>ago. I suspect it will run a thunderbolt for a month. Check eBay and you
>can probably pick one up cheap.
>-bob
I tried to use a Trust UPS to transport a GPSDO for a demonstration so
that I would not have to wait for the warm up and stabilisation period. The
attempt failed because the UPS cut out after a few minutes despite the UPS
being proven capable of running a 60 Watt light bulb for an hour. After
emailing the distributors it turned out that the unit was designed to cut out
if the load was not high enough. The 8 Watts the GPSDO used was not enough
in this case despite the UPS theoretically being able to support it for
over 7 hours.
You may need to check out the specification of the UPS to see that the
minimal loading will not be a problem if you are looking for a long support
time from a UPS.
Regards
Malcolm
G0MIC
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