hi Paul, Bob, Is there a significant difference between these telco-surplus Rb and the more 'fancy' ones in this regard?
I happen to own an Efratom MRK-HLN, which, I presume, is also more geared towards "always on". So, I wonder would the MRK be better or worse compared to a telco-surplus unit? Arguably a telco-surplus unit is also of the always-on variety or? best, Wilko (newbie trying to get a feel for this) > On 11 Dec 2021, at 16:27, paul swed <[email protected]> wrote: > > Totally agree with Bob. Same experience. > > >> On Sat, Dec 11, 2021 at 8:12 AM Bob kb8tq <[email protected]> wrote: >> >> Hi >> >> Yes, that’s pretty normal operation for any of the telecom Rb’s. They >> also typically drift about 1x10^-9 over the first day of operation. It’s >> best to leave them running all the time. Second best is to turn them >> on a couple days before you need to use them. >> >> Bob >> >>>> On Dec 11, 2021, at 2:23 AM, Erik Kaashoek <[email protected]> wrote: >>> >>> My rubidium frequency standard (Accubeat AR60A) finally got its nice box >> with good cooling and some LED's showing the status. >>> While watching the unlock LED I noticed the AR60 say's it is locked, >> about 4 or 5 minutes after cold start, when the frequency error jumps below >> about 1e-8 >>> It takes 2 or 3 more minutes of slow drift to become stable within >> 1e-10. Is this to be expected? >>> With this locking speed it is tempting to switch off the AR60A unless >> needed for some measurement. Would daily switching on/off have any impact >> on lifetime? >>> _______________________________________________ >>> time-nuts mailing list -- [email protected] -- To unsubscribe >> send an email to [email protected] >>> To unsubscribe, go to and follow the instructions there. >> _______________________________________________ >> time-nuts mailing list -- [email protected] -- To unsubscribe send >> an email to [email protected] >> To unsubscribe, go to and follow the instructions there. > _______________________________________________ > time-nuts mailing list -- [email protected] -- To unsubscribe send an > email to [email protected] > To unsubscribe, go to and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] -- To unsubscribe send an email to [email protected] To unsubscribe, go to and follow the instructions there.
