Hal
I think you will find that 28 volts DC is standard in many aviation and
military mobile equipment power requirements. It is the nominal battery
voltage that comes from two 12 volt cells in series that are fully charged.
The voltage to run such equipment is not critical (can be less than 28
volts), as you normally charge two series 12 volt cells at 27.6 volts - this
is indicative of the nominal voltage of such supplies. Trust that this is
the information you are looking for ?
Roy Phillips.
----- Original Message -----
From: "Hal Murray" <[email protected]>
To: "Discussion of precise time and frequency measurement"
<[email protected]>
Sent: Tuesday, July 21, 2009 7:59 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.
--
These are my opinions, not necessarily my employer's. I hate spam.
_______________________________________________
time-nuts mailing list -- [email protected]
To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
_______________________________________________
time-nuts mailing list -- [email protected]
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
