> Hi Antonio, > > precise pendulum clocks also suffer rate jumps, the process > of rate jumping seems to be common to most time counting > systems.
Thanks, I was missing this info. > I have an LPRO rubidium oscillator. I mounted it on a heat > sink with fins and placed it in an insulated box. A small > (40mm) fan is switched to control the base-plate > temperature at 40*C + or - 0.05*. As it warms up to the > control point the oscillator control voltage changes by 1 > volt, so the oscillator control voltage is very temperature > sensitive. I do not think it will age beyond its > control range. In this case, I believe it is a design spec. I experience the same with several LPRO's. The crystal inside LPRO has an heatsink itself, which would improve the thermal coupling between it and the rest of the assembly. I think it is expected to run at its nominal frequency after the warm-up of the whole unit. It may have beed designed accordingly. 73, Antonio I8IOV _______________________________________________ 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.
