[time-nuts] Lamp for FRK Rubidium Needed

[paul swed]

OK so the scientific method. NOT.
The FRKs are nice in that you can get to the pellet pretty easily from the
posts I have seen on time-nuts. The FRS you have to break a glass cover.
Much like a very thin microscope cover slide. No way to fix that and I am
sure it matters only it doesn't seem to.
Heat the bulb with a heat gun it will get pretty hot so you need something
to hold the bulb.
Couple of things will happen. The black stuff will disapear very slowly Or
most likely a blob will form at the bottom or low spot. This blob needs to
be heated and gently rolled back just by tilting it in the direction you
want it to go in. You want it away from the emission end of the buld. As
you heat it will slowly vaporize so you want to gently do this until its
gone.
Do not go red hot on anything you will get a feel. Peter I actually suspect
you will come back with far better guidance then I have given here.
Regards
Paul
WB8TSL


On Fri, Jun 20, 2014 at 2:46 PM, Peter <peter at g0rsq.co.uk> wrote:

>
>
> paul swed <paulswedb at ...> writes:
>
> >
> > Chuck is correct I have done this trick on FRS units. The glass clears
> and
> > the lamp re-ignites and continues to work for a long time. Actually it
> > hasn't failed and this must be 2 years now.
> > Regards
> > Paul
> > WB8TSL
> >
> > On Fri, Jun 20, 2014 at 8:34 AM, Chuck Harris <cfharris at ...> wrote:
> >
> > > Just in case you weren't aware, bad lamps can often be
> > > resurrected by the judicious application of heat.  The idea
> > > is to heat the bulb enough to evaporate all of the Rb
> > > that is deposited on the glass (making it black), and then
> > > let the lamp cool.   The Rb will again condense out on the
> > > glass, but this time it will condense out where the lamp
> > > is coolest, and will spare the rest of the bulb, allowing
> > > the light to get out.
> > >
> > > -Chuck Harris
> > >
> > >
>
> Chuck and Paul
>
> Do you have any more specific information on how to do this?
>
> I also have an FRK that has a lamp that is failing to run consistantly, and
> would like to try this to resurrect it.
>
> I am afraid of doing more harm than good without some good guidance.
>
> regards
>
> peter
> G0RSQ
>
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