At the prices of these Rb devices, why not get one. If for nothing else than a learning experience. They cost about what a Textbook costs today !!
73, Dick, W1KSZ -----Original Message----- >From: Joseph Gray <jg...@zianet.com> >Sent: Oct 5, 2009 1:20 PM >To: j...@quik.com, Discussion of precise time and frequency measurement ><time-nuts@febo.com> >Subject: Re: [time-nuts] Why would I want a rubidium > >I know I don't "need" any of this stuff. I was just wondering what I >could do with a rubidium vs what I already have. > >On Mon, Oct 5, 2009 at 10:58 AM, J. Forster <j...@quik.com> wrote: >> From an engineering point of view: >> >> Very few people really "NEED" a Rb or Cs as they are not really doing >> anything that requires that level of precision in frequency or accuracy in >> time (me included). These days a BC-221 or WWB is not good enough, but 1 >> Hz at X-Band is for almost all practical uses. >> >> It's a hobby. Just enjoy it! >> >> FWIW, >> -John >> >> ================ >> >> >>> Rubidium is a 'Secondary' reference, meaning it must be calibrated against >>> a >>> 'Primary' reference such as a Cesium Beam or Hydrogen Maser or, perhaps, >>> your GPSDO. Cesium Beam Standards some times appear on e..y in various >>> states of disrepair but are fun to play with. There have been many >>> discussions about their merits, or lack there of, on this list and it >>> might >>> make interesting reading. I am amazed that, in my little shop, I can >>> generate something that seems 'locked' to the signal I get from my GPSDO >>> and >>> requires no calibration. >>> >>> Your GPSDO is 'linked' to the NIST Hydrogen Maser via the satellites. The >>> only problem comes when and if the satellites are not usable. >>> >>> I am a relative 'newbie' as well, so be careful. This stuff is addicting. >>> >>> Joe >>> >>> >>> >>> -----Original Message----- >>> From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On >>> Behalf Of Joseph Gray >>> Sent: Monday, October 05, 2009 2:09 AM >>> To: Discussion of precise time and frequency measurement >>> Subject: [time-nuts] Why would I want a rubidium >>> >>> >>> Sorry for the newbie question, but with two Z3801A's, what use would I >>> find >>> for a rubidium unit? I see lots of them on ebay from the Chinese sellers. >>> >>> _______________________________________________ >>> 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. >>> >>> >>> _______________________________________________ >>> 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. >>> >>> >> >> >> >> _______________________________________________ >> 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. >> >> > >_______________________________________________ >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. _______________________________________________ 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.