[time-nuts] WTS: Efratom PTB-100 Precision Timebase

[Gregory Beat]

In 2008, G Molenkamp, VK3UM noted that of the 20 Efratom model FRS-C units he restored, component failure due to long heat exposure caused most of the failures. 
http://www.vk3um.com/Rubidium%20rejuvination.pdf
He notes that some lamps had Rb splattered over the inside wall of the glass.  
In these cases, the Rb material was not consolidated in the “pinch of the glass lamp”.
Using the “heat gun process” he was able to rejuvenate those Rb lamps.

w9gb
==
>Time-Nuts Group,
>For someone interested in working on the Rb package which I believe is the
>FRK series. Worked great in my lab for years and recently started being real
>slow to lock during power cycles and now won't lock at all. Not sure what
>the fair asking price would be in this condition. Maybe someone has
>repair/refurb experience with the Efratom FRK.
>Contact me if interested.
>Don