Check the crystal frequency - if it has drifted too far, the frequency will not be "scanned" through the cells resonance.
Cheers!
Bruce
Quoting "Jared Cabot via groups.io" <jaredcabot@...>:
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Hi all,
I have a 5065A Rubidium Standard that was working ok, but has lost the 2nd harmonic.
My voltages are all ok, the physics package hasn't overheated and I have replaced the usual resistors on the lamp assembly (and it was running fine afterward for a while), the lamp illuminates, and I've done the procedure to remove cell flooding.
All readings on the 'circuit check' switch are nominal, apart from the 2nd harmonic position. No matter what I do, I can no longer get it to raise above 0.
However, when I first turn the unit on, the needle drops to 0 and flicks a little before settling on 0 and staying there.
Can someone help me get this unit up and running again?
Thanks!
Jared
