Hi Rubidiums are somewhat unusual beasts. They typically have two heated zones ( = two ovens) in them. One is a bit hotter than the other. Because of the basic physics, those ovens are right next to each other / in contact with each other.
If you go to crazy with the insulation, the “colder” oven will heat up due to heat leakage from the “hotter” oven. You need a certain amount of heat coming off the package to allow this to happen. The bigger issue is that there is a pretty big batch of electronics near the ovens in the typical telecom Rb. Unless you heatsink things pretty well these parts heat up. When they do their MTBF drops quite a bit. You save a couple of watts of heat (maybe) and loose the Rb after a year or two. Not a great tradeoff. Yes, there are a lot of different designs for lab grade Rb’s. There are also some really tiny little guys running around. Neither category is all that easy to get on the surplus market. If you want to dive into either of those categories, there are issues, they just may not be quite the same. Bob > On Oct 4, 2021, at 1:39 PM, Wim Peeters <[email protected]> wrote: > > Insulation decreases the power consumption. But it will also increase the > temperature of the electronics. > > A heath-sink will cool the electronics but will increase the power > consumption. > > Or maybe insulate the part of the case that gets hot, and put a heat-sink on > the other parts? > > Wim Peeters > _______________________________________________ > time-nuts mailing list -- [email protected] -- To unsubscribe send an > email to [email protected] > To unsubscribe, go to and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] -- To unsubscribe send an email to [email protected] To unsubscribe, go to and follow the instructions there.
