Question: Do you stabilize the oscillator inside the dewar, or do you stabilize the temperature of the dewar's outside environment?
This may boil down to a slightly different expression: Where do you *sense* the temperature for the stabilization loop? On the crystal itself, or on the outside wall of the dewar? Thanks, Dana On Fri, Aug 2, 2019 at 4:00 AM Bill Slade <slade_b...@hotmail.com> wrote: > Hello! > I have done this and can attest that it works well. I did not use a TCXO, > though. I used a 48 MHz, third-overtone AT-cut crystal in a Colpitts > oscillator configuration. The vacuum flask was ovenized to maintain > temperature near the stationary point of the temp characteristic (near 50 > deg C). The oscillator could be phase locked to an external atomic > reference (in our case, a rubidium) or 10 MHz from a GPS receiver. > > The inspiration was a couple of excellent NASA reports from some years > ago, which I have attached (as links because files are large) for > convenience. > Cheers, > Bill > Nasa Precision Quartz 1< > https://onedrive.live.com/embed?cid=3CBCA1CF8AB21FE1&resid=3CBCA1CF8AB21FE1%213504&authkey=AA4EqyT05-Iz2nU&em=2 > > > Nasa Precision Quartz 2< > https://onedrive.live.com/embed?cid=3CBCA1CF8AB21FE1&resid=3CBCA1CF8AB21FE1%213505&authkey=AEG_NqxtMFVIE_o&em=2 > > > > On 02/08/19 01:35, Perry Sandeen via time-nuts wrote: > > Yo Bubba Dudes!, > If one has the space, a simple cure might be to get one of the wide mouth > thermos containers that they sell in large variety stores such as Wal-Mart > for being able to eat something like stew or some semi-solid hot food out > of the container itself. > Regards, > Perrier > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com<mailto: > time-nuts@lists.febo.com> > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. > > > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
