[time-nuts] Where does 28V come from?

phil fortime at bellsouth.net
Tue Jul 21 07:17:00 UTC 2009


----- Original Message ----- 
From: "Hal Murray" <hmurray at megapathdsl.net>
To: "Discussion of precise time and frequency measurement" 
<time-nuts at febo.com>
Sent: Tuesday, July 21, 2009 2:59 AM
Subject: [time-nuts] Where does 28V come from?


>
>> That said, the modules also appear to be powered by 28VDC, add some
>> regulation, you could use the chassis to power the Thunderbolt, and
>> mount it in one of the blank panels.
>
> Lead acid batteries are close to 2V per cell.  For cars/trucks, they come
> conviently packaged in 6V and 12V units.  The phone company works off 48V.
>
> But where does 28V come from?
>
> The Isotemp OSCO 127-10 data sheet says 27 V, but that's +3, -6 or 21-30V
> which straddles both 24V and 28V.

Hal,
Where did you find that Isotemp OSCO 127-10 data sheet ?
Any other data on that unit?
Phil 





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