Bill and Magnus, Thanks for the tips. At this point I was mostly curious to see if the oscillator worked and if it was reasonably stable. To let it cook for a while, I will definitely have to put everything in a box. I am getting a battery and putting the pieces together to run it off battery or AC. I have a nice portable enclosure that has been on the shelf for months. This would be a good use for it.
Later, I want to replace the OCXO with a Rubidium. In the mean time, I'll have the OCXO to play with. When I get the Rubidium, I'll replace the OCXO and have a much better portable standard. I just happened to have the OCXO and the enclosure lying around, so I thought I'd start there. Joe Gray W5JG On Tue, Apr 12, 2011 at 2:48 PM, Magnus Danielson <mag...@rubidium.dyndns.org> wrote: > On 04/12/2011 10:05 PM, WB6BNQ wrote: >> >> Hi Joe, >> >> You should have left the frequency adjustment alone for at least 30 days >> and more >> like 90 days. On a high quality oscillator it takes at least 30 days >> minimum for >> the package to stabilize. Otherwise you will just be chasing all the >> mechanical >> stresses, including the crystal itself, that take that long to settle out. >> Changing the adjustment causes additional stresses that need time to >> settle. It >> does not have to be "spot on" frequency to determine the drift and the >> Adev. >> Unless the thing is so far off as to be outside the range of your >> measurement >> process, it would have been better to leave it alone. > > It soo depends on the quality. For lesser OCXOs the daily shifts have the > frequency walk around sufficiently anyway. Still, you want the oscillator > run for quite some time for the normal termal related drift (many sources) > to settle down. > > Cheers, > Magnus > > _______________________________________________ > 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.
