Poul-Henning wrote:
Cooling Rb's should happen only through the base-plate.
For frequency stability, you should strive to have a constant baseplate temperature.
I mounted an FRS-C in an unvented cast aluminum box by its baseplate (after cleaning up the mating surface in the box on a mill to get good contact), then mounted the cast box on shock mounts in an enclosure along with a power supply, batteries, dist amp, dividers, monitoring, etc. The outer box has a small, variable-speed fan that is controlled by the temperature of the inner box in the middle of the FRS-C baseplate contact area. The control loop keeps that temperature at 45C +/- about 0.1C. It seems to work very nicely. I can't detect any effect from the fan's vibration.
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.
