); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY [EMAIL PROTECTED] wrote: > Hi Rick, > > thanks for the pointers to the E1938A oven quality. > > Today there are some interesting new technologies which allow small double, > or even tripple (not sure if that makes sense) ovens to be built. Vectron for > > example just had a lead-article in RFDesign magazine introducing their > newest evacuated OCXO's. > > _http://rfdesign.com/vlf_to_uhf/time_and_frequency/709RFDF1.pdf_ > (http://rfdesign.com/vlf_to_uhf/time_and_frequency/709RFDF1.pdf) > > They claim stabilities on the order of 2E-07 over a very wide temp range of > -40 to +85C in a DIP14 can. > > The 1/2 size DIP8 can is supposed to be available end of the year with > similar performance. > > Those small cans and wide operating ranges should make it possible to build > a nice small and inexpensive oven. If one can get a true thermal gain of > 1000+, then that would theoretically mean stabilities approaching 2E-010 > over > temperature. That's 1.6E-012 per degree Celcius. > > bye, > Said > Said
The lack of radiation shields and an isothermal block enclosing the oscillator components within the vacuum will surely reduce the performance somewhat. Bruce _______________________________________________ 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.
