Typical 10811 warm-up time is circa 10 minutes; cool-down time is actually several times longer (since there is no active "cool-downer" in the case!)
More modern, smaller OCXO's will warm up and cool down more quickly. If it's a double oven or user has added extra insulation around the basic OCXO, the times have to get longer. I remember someone here wanting to put his OCXO in a Dewar. As we used to say at Caltech, "Whatever fills your Dewar!". Not to be confused with "bake out" time! Tim N3QE On Wed, Oct 1, 2014 at 1:07 PM, Dr. David Kirkby (Kirkby Microwave Ltd) < drkir...@kirkbymicrowave.co.uk> wrote: > Following on from my question the other day about the type of > oscillator in the HP 8720D VNA, I finally got around to setting this > up on the spectrum analyzer today. Luckily, some software I wrote back > in 2008 for a friends HP 70000 system was easy to modify to grab the > save the frequency. So I can now grab the data. I will post a plot > later, once I have collected the data from a cold start. But it got me > wondering, how long do ovens take to cool? I'm sure it must depend > somewhat on the oven. > > According to someone on this list (sorry forget who), the option 1D5 > is an oven, but not a particularly good one. Unfortunately he can't > share the data he has on it, which is a bit annoying, but I understand > his reasons. > > Anyway, later today (tomorrow ??) I will post a plot of frequency vs > time. The question is though, how long is thing thing likely to take > too cool? > > My lab is air-conditioned, set at 23 deg C, though it varies about +/- > 1.5 deg C from that. > > Dave > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.