[time-nuts] Re: Question: Efratom FRK-L Rubidium Standard

[paul swed]

Hal
I am not sure the bulbs wear out. But on telco Rbs I have seen the Rb
plates out on the glass. Other time-nuts have seen the same.
When that happens the bulb darkens and lowers the transmission. Finally
with enough Rb missing the lamp fails to ignite.
Others and myself have heated the lamp to get the RB back into circulation
and they fire up and run quite well and seem to end up back in the midlife
region. Its really hard to say how good they are but they ignite and lock
and are stable.
Regards
Paul.

On Mon, Aug 28, 2023 at 4:49 PM Hal Murray via time-nuts <
time-nuts at lists.febo.com> wrote:

>
> Razvan Popescu said:
> > It depends on the lamp life left... The majority of the FRK-L units I saw
> > have a date code from '84 to '92 and if they were powered on 24/7
> probably
> > not much life is left in the lamp.
>
> What wears out in a Rb lamp?
>
> --
> These are my opinions.  I hate spam.
>
>
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