Jared OK lets start. Can you share a bit with us please. Whats types of test equipment do you have. Believe we will need a scope, DVM (Reasonable grade), audio sig gen, perhaps a fairly good reference GPSDO. I am coming at this with the possibility the issue could be anyplace. The suggestion that the oven temps could be off is a good one. Though I have not so far run into that on CS or Rb references. I need to pull the 5065 manual and take a look but injecting small amounts of first and second signals should make the meter tick upscale. I believe that is 137 and 274 hz. Its possible and I have seen this issues simply on the metering board. But want to approach it logically by eliminating the detector chain. Regards Paul
On Thu, Nov 18, 2021 at 12:56 PM Jared Cabot via time-nuts < [email protected]> wrote: > 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_______________________________________________ > time-nuts mailing list -- [email protected] -- To unsubscribe send > an email to [email protected] > To unsubscribe, go to and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] -- To unsubscribe send an email to [email protected] To unsubscribe, go to and follow the instructions there.
