How Much did the OCXO Drift Since the Last Calibration?

In this video I did a quick check on whether the OCXO frequency in my HP5350B had drifted since I last calibrated against a Symmetricom 8040 Rubidium standard. Also I finally got a chance to calibrate the OCXO in my Racal Dana 1992 frequency counter. Links to my the teardowns I mentioned in the video are listed below:
http://www.kerrywong.com/2014/06/29/hp-5350b-microwave-counter-teardown/
http://www.kerrywong.com/2014/07/01/hp-5350b-ocxo-repair/
http://www.kerrywong.com/2017/01/30/hp-5350b-backlight-upgrade/
http://www.kerrywong.com/2017/02/12/teardown-and-repair-of-a-racal-dana-1992-frequency-counter/
http://www.kerrywong.com/2017/03/04/datumsymmetricom-8040-rubidium-frequency-standard-teardown/

Видео How Much did the OCXO Drift Since the Last Calibration? канала Kerry Wong