Hi Either tear into the OCXO or go shopping for a new(er) GPSDO. The Z38xx devices all had a lot more in common with each other than they did differences. The OCXO design changed from the 10811 to various more modern designs. The disciplining process seems to have remained pretty much the same over the years.
Bob > On Mar 5, 2018, at 11:21 AM, Joe Hobart <n...@npgcable.com> wrote: > > > Thank you, Hal, for these links and to others for your comments. > > Setting the oven temperature on a turning point appears tedious. Perhaps > there > is enough range in the frequency adjustment to put the oscillator back on > frequency - or close enough for the EFC to be effective. If not, I may have > to > adjust the temperature, but time is limited. > > Some measurements with the EFC disconnected and a calibrated frequency > counter: > > 9999.815 KHz at Z3801A turn on > > 9999.9984 KHz highest frequency seen (temperature overshoot) > > 9999.9947 KHz approximate final frequency > > The EFC does have wide range; it can almost pull the 5.3 Hz offset onto > frequency. > > Thanks again, > Joe, W7LUX > > >> Does the oscillator have an adjustment? If so, is this somewhat accessible >> without destroying the assembly? Are there pictures of the oscillator >> assembly? > > https://www.realhamradio.com/GPS-oven-journey.htm > > https://www.realhamradio.com/z3801a-turning-point.htm > > _______________________________________________ > 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.
