[time-nuts] Oncore battery backup

[Greg Broburg]

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<jgray at 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
>>
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>
>