Dave wrote:
what about replacing your aluminium box with a, say 2 foot piece of 6 inch pvc pipe (ocxo suspended inside it clear of the wall and sealed off ends) and burying that a few feet in the ground?
I share Poul-Henning's lack of enthusiasm for burying electronics. But if you try it, I'd be interested in hearing how it works. Depending on your climate, you may need to go deeper than a few feet to achieve a reasonable approximation to isothermy. Of course, even a few feet should get you to where the rate of change of temperature is quite slow and the peak-to-peak swing is lower than the outside air temperature. (But is that the standard? Aren't most time-nuts labs in climate-controlled living spaces?).
If you really want to go nuts, it's pretty simple to put the cast aluminum box into a larger enclosure with a small, thermostatically controlled fan. If you bond a temperature sensor to the inside wall of the cast box, it's easy to hold the temperature of the cast box to well within 0.1C.
Best regards, Charles _______________________________________________ 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.
