[time-nuts] Restoration of a 5065A - Continued (Ulf Kylenfall)

Scott McGrath scmcgrath at gmail.com
Tue Sep 12 19:13:28 EDT 2017


Hi Ulf

Also you noted the bulb had the thermionic device,   That's used for remigrating the Rb into the reservoir there is a procedure for doing it in the manuals on the web.

It can take up to a week to draw all the Rb back into the reservoir after long inactivity.    Just make sure you use a well regulated power supply while doing this procedure

Content by Scott
Typos by Siri

> On Sep 12, 2017, at 7:01 PM, paul swed <paulswedb at gmail.com> wrote:
> 
> Totally agree with Scott.
> On the lamp thats good it lights.
> If you search older threads on Time-nuts you will see that on the FRS
> rubidiums you can heat the lamp with a heat gun and re-migrate the RB off
> of the glass. It makes them re-usable and extends the life very nicely.
> I do not suggest doing this if the lamp lights and the system can be
> recovered. Just something to know about. I have done this several times on
> different FRS units.
> 
> Wow now you have 2 5065s. Nice.
> Regards
> Paul
> WB8TSL
> 
>> On Tue, Sep 12, 2017 at 5:16 PM, Scott McGrath <scmcgrath at gmail.com> wrote:
>> 
>> I would say fix both units
>> 
>> The color of the bulb is simply Rb vapor condensed on the walls of the
>> envelope.
>> 
>> 10811 units are fairly common at good hamfests and ebay
>> 
>> Content by Scott
>> Typos by Siri
>> 
>>> On Sep 12, 2017, at 4:54 PM, Ulf Kylenfall via time-nuts <
>> time-nuts at febo.com> wrote:
>>> 
>>> 
>>> What does the community say: Can the lamp still be useableas a spare, or
>> is the color a sign of end-of-life?
>>> I am considering either use this instrument as spare parts or tryto
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