[time-nuts] Actual life time of a Datum LPRO-101?

[Predrag Dukic]

Hi, Neville,

is the same with FEI products; Higher voltage when new,  decreased with aging?

Predrag Dukic






At 12:17 30.3.2009, you wrote:
>Hi,
>they finish their life when the lamp fades out.
>When you stoke it up there is a lamp monitoring voltage that
>is about 10 volts when new but drops below 4 volts at end of life.
>Otherwise, if it will lock on it is probably a good unit. New users
>tend not to understand that the frequency trim only covers a range
>of a few millihertz, which is quite enough to set them right.
>I have seen comments like" it does not respond to the frequency trim..."
>by users that are used to OCXO standards.
>The manual is around.
>Cheers, Neville Michie
>
>
>On 30/03/2009, at 8:41 PM, Ulf Kylenfall wrote:
>
> >
> > All,
> >
> > Does anyone have any experience with the Datum/Efratom LPRO-101
> > Rubidium standard? There are large amounts of these on e-bay.
> >
> > The datasheet specifies life time to "at least" 10 years
> > and the one that I found on a flea market is dated 1999.
> >
> > I assume that they are replaced as a planned maintenance
> > and the unit that I found was said to be in good health.
> >
> > Comments invited
> >
> > Ulf Kylenfall
> > SM6GXV
> >
> >
> >
> >
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