I've been paying particular attention to the discussions involving the FE-5680A frequency standards of recent attention. I do not have a FE-5680A yet, but rather I am studying what is shared from the others prior to buying. At the very least I want to know what I'm up against should I get a DOA module.
It appears that these units use a heated crystal.(..i sure hope it's heater and not an acoustic resonator). Has anyone performed sub 1degree c drift testing against a known stable source? What are the performance gains by using tighter temperature control? Also It appears that quite a few of these have corroded Rb tube interfaces. My guess is the corrosion is a tale-tale sign of small amounts of rb gas leakage in combination with the raised temperatures of the tube oven? If this is the case I suppose a visual check of the tube interface for corrosion would yield a fair approximation of the tube condition? Lastly, is the Rb tube a quartz tube or is it a metal(silver lined?)canister sealed with polymer tape? Thanks, Steve _______________________________________________ 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.
