Hi Achim, I have very stable thermal conditions in my house. The temperature indicated by the box (internal sensor) does stay stable within 50 mK/d when the sun is not shining with very slow ripple. On sunny days the in-box temperature does climb up by about 350 to 450 mK (less then 100 mK/h) and will come back to the stable floor in about 12 to 14 hours. Today it was sunny from 11h30 to 15h30, raising the temperature by 300 mK to 29.25 °C. The box has no housing (yet) and is sitting on the to of my rack.
The influence to the EFC-Voltage is still visible (around 50 µV) but with a delay of close to 2 hours. Arnold, DK2WT Am 15.01.2011 17:36, schrieb Achim Vollhardt: > Hi list, > as my Thunderbolt is now nicely cooking for a few weeks now, I am > wondering what a typically achievable ambient temperature > stability/variation is in your setups. > > Of course, a more stable environment is better, but currently I am > struggling to achieve more than +-0.5 K variation on the temperature > reading on a weekend.. during working days (when I am around in the > lab), the variations are as much as 3 times higher. > > I am just wondering, if I should rather worry more about high > temperature gradients rather than excursions from a mean value, as slow > variation can be compensated by the control loop while for quick > changes, the loop is just too slow :) > > 73s Achim, DH2VA _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.