Hi One of the weak points of a normal 10811 is that it is not hermetically sealed. Left in storage for years, they “soak up” humidity. In some cases it can take a fairly long time (weeks, months) for them to fully dry out. Until they have been run for at least a week, don’t get excited about the drift.
Bob > On Nov 8, 2017, at 12:24 PM, Ulf Kylenfall via time-nuts <[email protected]> > wrote: > > > Gentlemen. > I am about to try to repair a second 5065Aand have now tested a number of > 10811 Quartzoscillators that was in the junk box. > In order to test the 10811, I put them it in a chassisthat is used for > GPS-locking. Adjust for lockand then monitor the EFC-voltage over time. > Starting out with a lock condition and the EFCvoltage adjusted to -2.500V I > can see that theoscillators exhibit a monotonus EFC voltagedrift towards 0 > volts. About + 1 mV in 3 minutes. > By comparison, I have a 10811-60109that was tested in the same > GPS-application andthis unit is rock-steadyand that does not show any sign of > EFC drift. > Test time has been 3 Days, and I beleive thata 10811 should have been able to > reachthermal equilibrium during this time. > I can and will (of course) take them apart.Anything special to look for other > thanthe usual signs of long-term over-heated discretes? > Ulf Kylenfall - SM6GXV > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
