According to your theory, there should be differences in the schematics of the oven controllers between the single and double oven variants of the 10811. Last year I picked up a couple of those double oven 10811s from China that had the outer insulation removed. I wonder if I could see any anomalies in its operation with no outer insulation and only the inner oven operating.
My understanding is that the unique "double" oven 10811 found in the Z3801A is not there for improved temperature stability, but simply so that this first-generation GPSDO can power up within spec in ultra cold (like minus 40) telecom environments.
No other hp/Agilent instrument uses an external outer oven around the 10811 as far as I know. Does anyone on the list have access to a low temperature test chamber? It would be interesting to see how slowly a 10544 or 10811 warms up from that cold environment as compared to a more modern and compact E1938 or MTI or TBolt-style OCXO. /tvb _______________________________________________ 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.
