[time-nuts] need recomendation for a portable 10mhz referenceoscilator

[SAIDJACK at aol.com]

In a message dated 12/11/2007 17:00:17 Pacific Standard Time,  wb6bnq at cox.net 
writes:

>A  very high quality ocxo would probably satisfy the need.  Or as  someone
>suggested, a combination of ocxo and a Rb.  The Rb would  provide the longer 
term
>needed for the really high multiplication into  upper GHz region and the ocxo
>locked to Rb would [ possibly ] provide  the "quiet" drive  source.

>Bill....WB6BNQ



Hi Bill,
 
a Rubidium would take about 15 to 20 Watts, and they don't  usually work at 
12V battery voltage typically.
 
At 20 Watts we would consume 1.67A at 12V, so a (large) 80Ah car batt would  
only last two days in best conditions at room temperature.
 
If we add the OCXO power and low battery temperatures, then we are probably  
down to 20 to 24 hours of operation or so.
 
BTW: interestingly Lead battery capacity is also related to discharge  
current, not just temperature.
 
bye,
Said



**************************************See AOL's top rated recipes 
(http://food.aol.com/top-rated-recipes?NCID=aoltop00030000000004)