On 5/1/2018 2:18 AM, Paul Bicknell wrote:
As I have just bought a Racal 9475 Rubidium and it has problems

Is there any stock faults ?

What is the life of the rubidium standard?

The Racal manual for this only covers the support stuff.  Your problem is almost certainly with the Rb module; these were some variety of FRK, either FRK-L or -H.  These are repairable without much difficulty, but obviously you will need the manual for it.  In the FRK there is a crystal that will have aged, and a free running audio oscillator around 8 kHz in the servo unit that may well need attention.  I did fix mine some ten or more years ago and since then it has worked when needed.   I wouldn't worry about the lamp yet before checking the rest of it.

Dan
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