[time-nuts] HP 5065A, no 2nd harmonic.
With that offset either the oven set point has changed or there has een a component value shift in the oscillator circuit. The easiest way to test is to stick in another 10811 if available. You could also install one of the original 105 style oscillators if you have one. Cheers, Corby ___ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there.
[time-nuts] HP 5065A, no 2nd harmonic.
Jared, There is a non-hermetic electrolytic cap in the A7 (100uf C3) that if it leaks can "eat" the lead or trace off killing the gain.. Pull the A7 and take a look at that. Cheers, Corby ___ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there.
[time-nuts] HP 5065A, no 2nd harmonic.
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 signature.asc Description: OpenPGP digital signature ___ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there.
