> > Some isothermal radiation (thermal) shields between the blanket and the > top of the Rubidium source may also be required. > > Unless you have a hydrogen maser you will need to use 3 rubidium sources > each with its own engine block in order to determine AVAR (using the 3 > cornered hat technique). > FEI claim that their rubidium sources are actually quieter than typical > caesium sources so using a caesium reference isn't as effective for > measuring the short term (< 1day) stability.
That's what I've found, even with no special effort to heat-sink the LPRO's baseplate. You need a better-than-average cesium standard to benchmark the medium-term stability of one of these. Not bad for $79... -- john, KE5FX _______________________________________________ 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.
