Ended up with a gently used trimble thunderbolt a few months ago, and been trying to figure out the best settings to use (time constant, damping, etc.) for best performance.
I got distracted though. There is something which I find rather annoying, and I'm spending more time messing with this factor than actually observing the performance at different damping / time constant / etc... The temperature seems to be aprox 20C above ambient temperature rather than a steady 40C. I thought the purpose of the oven was to keep the temperature stable. When I adjust the thermostat because I'm chilly, the thunderbolt gets warmer too (but not by as much) I've tried (seemingly, to me) everything: light insulation putting the unit in a spot away from drafts putting the unit in a place away from drafts in a shoebox with light insulation with a fan blowing in it (currently in a cupboard in this state, and the temp seems to fluctuate the least, but still by more than 1-2 degrees centigrade) I feel like shouldn't need to fuss with ambient conditions this heavily for an OCXO, and find myself researching construction / design for a DIY outer-oven to wrap the thunderbolt in. Anyone have experience with non-stable temperature on a trimble thunderbolt? I've also noticed (monitoring with Lady Heather's Disciplined Oscillator Control Program v3.10 by John Miles aka KE5FX) the thunderbolt unit sometimes flags an alarm briefly (and I rarely ever manage to write it down before the screen updates or the alarm goes away) and the last one I was able to "catch" before it went away was related to temperature. Should I be getting a steady / non-flucturating 40C or something if the oven is working normally? Thanks in advance, Sarah _______________________________________________ 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.