[time-nuts] FE-5680A temp coefficient seems to be -7E-12 per degree C
EWKehren at aol.com
EWKehren at aol.com
Wed Dec 21 21:46:31 UTC 2011
I hope this picture goes through. I did mount the pictured heat sink on it
and when I started to look at long term I realized I had to temperature
control. I am holding the heat sink at 37 C within 0.1 C and over now three
weeks no aging and the stability 1 E-12. I am surprised and impressed.
Bert Kehren
In a message dated 12/21/2011 1:56:15 P.M. Eastern Standard Time,
beale at bealecorner.com writes:
My measurements on one FE-5680A Rb sample indicate a temperature
coefficient of -7E-12 per degree C (T measured at exterior case top
center); more details below. Can anyone opine if this is a reasonable
value?
I can't say anything about long-term drift until I stabilize the case
temperature. Currently experimenting with a variable-speed fan and PID
controller looking at a thermistor attached to the case, to that end.
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