Really have to open the 3801 up and go find the magical header. 2011/4/6 Greg Broburg <semif...@comcast.net>
> I would vote for a lithium AA. > > Something like a Tadiran TL5104 3V6 @ 2A10 hrs > > Greg > > > On 4/6/2011 2:43 PM, Chris Albertson wrote: > >> I remember reading in one of the docs I have for the Oncore that >> Motorolla recommended a battery over a cap mainly for practical >> reasons. But now all I can find is some basic specs for what you need >> to conect to pin-1 on the header >> >> BATTERY (Externally applied backup power) >> Voltage: 2.5 V to 5.25 V >> Current: 5 μA typical @ 2.5 V >> 100 μA typical @ 5.0 V >> >> >> On Wed, Apr 6, 2011 at 12:54 PM, Joseph Gray<jg...@zianet.com> wrote: >> >>> Yes, a UPS isn't the most efficient method of running the GPSDO. It >>> was an expedient until the day I run it on batteries. >>> >>> As for backing up the Oncore, power outages are not the only reason. I >>> may need to power down the GPSDO to add mods or other reasons may >>> arise. Having the almanac stored will help. >>> >>> I would still like to know if using a supercap is ok. They are made >>> for memory backup, so why couldn't I use one for the Oncore? I have a >>> few different values on hand. >>> >>> Joe Gray >>> W5JG >>> >>> _______________________________________________ >>> time-nuts mailing list -- time-nuts@febo.com >>> To unsubscribe, go to >>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >>> and follow the instructions there. >>> >>> >> >> > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.