Hi Bob, On Freitag, 4. September 2020 15:03:26 CEST Bob kb8tq wrote: > Hi > > Best guess is that the oven circuit has “issues”. If that’s the case, it > will go on pretty much forever and ever. Without a plot, it’s sort of hard > to guess ….
Unfortunately, I don't have a longer history on record, my monitoring software only logs about the last 7 hours. Hard to tell if the oven has an issue, I only checked the power consumption during warm-up, it looked "reasonable", but if the regulation is off and the crystal is not at its zero-aging temperature, not much I can do. I'll give it another week or two waiting for a sign of deceleration. If it doesn't happen, I'll scrap it. Regards, Matthias > > Bob > > > On Sep 4, 2020, at 2:50 AM, Matthias Welwarsky <[email protected]> > > wrote: > > > > Hi, > > > > I mentioned in a previous email that I seem to have picked a particularly > > bad (broken?) OCXO for GPSDO testing. It drifts at a very high rate, from > > the DAC graph I calculate it is around -4e-4 Hz/hour. It's been on for > > about 1 week now and the drift doesn't seem to come down, or maybe just > > marginally. > > > > Of course, this being a surplus OCXO with unknown history, odd startup > > behavior is somewhat expected but so far I haven't seen anything this > > drastic. > > > > Could this be OCXO retrace? How long can that phase last? I'm trying to > > decide if I should give it another week or just scrap it and move on. > > > > Regards, > > Matthias > > > > > > > > _______________________________________________ > > time-nuts mailing list -- [email protected] > > To unsubscribe, go to > > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and > > follow the instructions there. > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow > the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
